Andrew Huberman's framework for building a rational, personalised supplementation protocol
Andrew Huberman presents a solo episode on how to think about and approach supplementation for health and performance.
Summary
Andrew Huberman, neuroscientist and professor at Stanford School of Medicine, presents a structured framework for thinking about supplementation rather than simply recommending specific products. He argues that behavioral tools and nutrition must form the foundation of any health protocol, with supplementation layered on top — and that no supplement can compensate for poor sleep hygiene, poor diet, or lack of exercise. The episode covers three specific domains of single-ingredient supplementation — sleep, hormone support, and cognitive enhancement — with concrete examples, dosage guidance, and cycling recommendations for each. A central and recurring argument is that single-ingredient formulations, tried individually before combining, are the most powerful approach because they allow you to identify what works and what doesn't for your specific biology. Huberman also emphasises that many of these non-prescription compounds are genuinely potent molecules, not merely mild add-ons, and should be treated with appropriate care.
Key Takeaways
FULL TRANSCRIPT
The hierarchy of tools for health and performance
Andrew Huberman: Today we are discussing supplements — or more specifically, a rational guide to supplementation. During today's episode, I'm going to give you a number of different, very specific questions that you can answer in order to decide whether or not you should be taking any so-called supplements.
As we head into today's conversation, I want to emphasize something very important — not just as it relates to supplements, but as it relates to all aspects of mental health, physical health, and performance. I take the stance that behavioral tools — that is, specific actions that we take and specific actions that we avoid — form the foundation of mental health, physical health, and performance. Things like viewing morning sunlight and exercise are behavioral tools. They don't require the ingestion of anything.
Second to that, I would say the next layer is nutrition. No amount of supplementation, or non-prescription compounds, or prescription compounds for that matter, can ever compensate for poor nutrition — at least not for very long. Then, on top of that, I would place what is typically called supplementation, although today I'm trying to expand that word to include not just things that compensate for food deficiencies, or that are layered on top of food as a way to enhance the amount of nutrients you could get from food, but also compounds that are non-prescription, that can be used for a variety of different purposes, and many of which are not available in food at all. So I would place supplementation right on top of nutrition.
Then, past that, I would say prescription drugs — obviously prescribed from a board-certified MD. That said, there are many instances in which people can either reduce their dosages of prescription compounds or can replace those prescription compounds with quality behavioral tools, nutrition, and supplementation. But there are also many instances in which prescription drugs are the only route by which people can achieve the mental health, physical health, and performance goals they wish to achieve. So I would place that as the fourth layer in this stack.
Before moving further, I want to emphasize a very important point: I am not a physician. I'm not a clinician. I do not prescribe anything, nor am I going to do that today. I'm a professor. I review the research literature. I describe tools gleaned from and developed from the research literature. So I profess many things, but I do not prescribe anything. It is vitally important that anytime you are thinking of adding or subtracting any behavioral protocols, nutritional protocols, supplementation-based protocols, and certainly prescription drug-based protocols — for whatever purpose — that you consult a trusted, board-certified physician. That's absolutely essential.
What this episode is actually about
The most important aspect of today's episode is not that you discover one particular supplement or category of supplements or blend of supplements that is going to transform your mental health, physical health, and performance. The purpose of today's episode is for you to understand where you have needs that can be met by supplementation better than any other approach, and most importantly, how to think about supplementation — how to think about the different categories of supplements that are out there, and how those interact with your nutrition and your behaviors, so that you can maximize your immediate and long-term health.
Indeed, it may be the case that the ideal dosage of a given supplement for you is zero milligrams. For instance, if I ask you: are you sleeping deeply and enough each night? Do you feel rested throughout the day? Maybe you need a short nap and that's it, or maybe you don't. And you say, "Yes, I feel great. I sleep great. I wake up feeling great. I only need a short nap or no nap during the day to feel rested." Well, then there's really no discussion about sleep supplementation to be had. However, if you are not sleeping well, then a big discussion opens up as to what the reasons are. Is it related to nutrition, or when you're exercising, or when you're ingesting caffeine? No discussion about supplementation can be had in a vacuum. Discussions about supplementation need to be considered in a larger context.
So today you're going to learn how to place the discussion and thinking about supplementation in a larger context, and think about how specific supplements — specific ingredients and combinations of ingredients — can be used to buffer and support your overall health and lead you to specific health and performance outcomes.
Foundational supplements: the starting point for any regimen
So, what is an ideal supplementation protocol? Well, there are foundational supplements. These are supplements designed to establish a foundation or provide insurance alongside your nutritional intake to ensure that you're getting all the things you need in order to have a basic level of mental health, physical health, and opportunity for optimal performance. This is the one category of supplements for which I think it's appropriate — and in fact advantageous — to have multiple ingredients in a given supplement.
That raises a very specific question you need to ask: do you want to take a vitamin and mineral supplement? The answer will be highly individual, but you really just need to address two things. First, is the cost within the range that you can afford and want to pay? And then you need to ask yourself: are you able to regularly ingest enough foods with enough variety to cover your vitamin and mineral needs just from food?
For people who are extremely physically and/or mentally active, and for people who perhaps are following an intermittent fasting schedule — so they are not ingesting a lot of food in general, or are restricting their food intake to specific times of day — a vitamin and mineral supplement likely makes sense. However, it's going to be very important to ingest that vitamin and mineral supplement with food, because otherwise they can cause some stomach upset.
The so-called foundational supplements include, of course, a vitamin and mineral supplement, but the category has expanded over the last decade or more to also include things like digestive enzymes. This is why when people approach me and ask, "If I'm only going to take one supplement, what should I take?" rather than just giving them one specific answer, I actually ask them three questions. How well are you sleeping at night? How's your nutrition? And what's your budget?
Once those three questions have been answered, assuming that somebody is able to spend about $100 or more on supplements per month, my recommendation is that they not focus on any specific supplements directed toward sleep, or focus, or hormone augmentation, but rather that they focus on buffering and enhancing their foundational nutrition — adaptogens, probiotics, prebiotics, and digestive enzymes — because of the simple fact that if they do that, they're going to raise the tide on all the biological and organ systems that will lead to enhanced mental health, physical health, and performance, including sleep.
To close the conversation on foundational supplementation: I think a broad-spectrum supplement that has many, many ingredients is going to be the best route to ensuring foundational supplementation is covered, and I do think that should be the starting place for any and all supplementation regimens. That's going to allow you to feel better overall, sleep better overall, focus better overall, and support all the different systems in your brain and body that are going to allow you to be at your best — while of course also paying careful attention to your nutrition, because you simply cannot abandon nutrition, nor can you abandon the behavioral tools. Things like sunlight viewing, exercise, and so forth. Better living through chemistry still requires better living. Chemistry through supplementation should be an augment — a support to the behavioral and nutritional factors in your life that you're already paying attention to and trying to optimize.
Single-ingredient supplements for sleep
I'd like to now shift our attention to single-ingredient formulation supplements designed to achieve specific endpoints. The three categories I'm going to cover are sleep, hormone support, and cognitive enhancement and focus.
When thinking about supplementation for sleep, we need to ask ourselves a number of important questions. First of all, you should ask yourself how well — that is, how deeply and how much — you are sleeping per night. If you are someone who is not sleeping enough, there are two questions you should ask yourself. First: are you ingesting caffeine after 2:00 p.m.? If the answer is yes, you want to limit or eliminate caffeine after 2:00 p.m. The second thing is that most people would do well to avoid food within the two hours prior to bedtime — though of course you don't want to be so hungry that you can't fall asleep.
Those are the nutrition and behavioral tools that everyone needs to consider first. If, for instance, you're someone who falls asleep just fine but wakes up in the middle of the night around 2:00 or 3:00 a.m. and has trouble falling back asleep, there are two categories of supplements you might want to consider. The first is myo-inositol, typically taken at 900 mg.
Other people who wake up in the middle of the night do so because their dreams are very intense. Those people would do well to avoid certain supplements. In a moment I'll talk about the value of theanine for falling asleep, but theanine — which is typically taken in dosages anywhere from 100 mg to 400 mg — can be great for many people. However, for people who have excessively vivid dreams, those dreams can lead to immediate waking and sometimes a little bit of anxiety upon waking in the middle of the night. So some people who wake up jolted mentally and physically out of sleep because of intense dreams would do well to avoid theanine supplementation.
Now, for those of you who are not waking up in the middle of the night or not having excessively vivid dreams, but are having trouble falling asleep, two supplements in particular have been shown to be effective for shortening the transition time to sleep and allowing people to ease into sleep more readily. The first is magnesium threonate, which is interchangeable with magnesium bisglycinate. Both have transporter systems that allow them to readily cross the blood-brain barrier, and they lead to a mild form of drowsiness — mild in the sense that it's not going to prevent you from operating a motor vehicle or responding to any emergency that might arise in the middle of the night, but people who take them often find that their transition time into sleep is much faster and their sleep is also much deeper. Incidentally, those supplements are also thought to be useful for cognitive support and neuroprotection, although there's less data on that.
The other supplement is apigenin — spelled A-P-I-G-E-N-I-N — which is a derivative of chamomile. It also acts as a mild anxiety-lowering compound, which is essential prior to sleep for people to essentially turn off their thinking, or to reduce the amount of ruminating and problem-solving and future anticipation they're doing — which is a requirement for falling asleep.
So, what's the rational approach to supplementing in a way that allows you to fall asleep more quickly and stay asleep? Would you immediately take magnesium threonate and apigenin together? Well, that depends. If you have the budget and you simply want to fall asleep quicker and you don't care which of those two ingredients is going to be more effective for you, you could try one — for instance, magnesium threonate — for perhaps a week and see how that affects your latency to sleep, that is, how quickly you fall asleep. Or you could try apigenin in the first week. Or you could combine them both. Or you could try magnesium threonate for a week, then switch to only apigenin for a week and evaluate which one works better for you. If neither works for you, I do recommend trying the combination together.
This is just the way that any scientist would design an experiment to understand which variables — which ingredients — are most effective for the result you want, as opposed to just lumping them together and taking them. That said, a lot of people want excellent sleep so badly that they just say, "Okay, I'm going to take magnesium threonate, I'm going to take apigenin, I'm going to take theanine — and if my dreams are too vivid and I'm waking up in the middle of the night, I'll drop the theanine." Many people actually derive great benefit from that approach.
I think one week's time of taking something — provided it doesn't induce any negative effects — is a reasonable trial period. If something induces a negative effect, I recommend ceasing taking it immediately. But if something does not produce any negative effects, then try a single-ingredient formulation for about a week while not varying anything else in your overall protocols, and then see what works best and see if the combination works even better.
Once you start to develop that intuition — that sensitivity to how different ingredients impact you — it is an enormously powerful stance to have, because you're going to keep your costs limited, you're going to find the things that work particularly poorly for you, and more importantly, the things that work particularly well for you toward your goals.
Why Huberman doesn't recommend melatonin
Any discussion about supplementation for sleep has to include a discussion about melatonin. I will say once again: I am not a fan of melatonin, for a couple of reasons. Melatonin is a hormone known to induce sleepiness, but not keep us asleep. So oftentimes people will take melatonin, fall deeply asleep, and then wake up and have trouble falling back asleep. The other reason is that melatonin supplements almost always include levels of melatonin that far, far exceed the normal biological — so-called endogenous — levels that we would normally produce. And yes, it's true that as we age we produce less melatonin, but it's very clear that melatonin can impact not just sleep, but other systems in the brain and body.
Hormone support: behaviors and nutrition first
The next category of supplementation I'd like to talk about is hormone support. The discussion about hormone support and augmentation has to include some acknowledgment of the fact that nutrition — and the way nutrition impacts hormones, and the way hormones such as insulin impact other hormones such as free testosterone — all has to be acknowledged. It's also important to remember that behaviors matter for hormone status. Getting morning sunlight increases cortisol levels. Cortisol levels are very important to have elevated early in the day for focus, alertness, and immune function, and to make sure that cortisol levels are low at night — so that levels of growth hormone and testosterone, which is secreted mainly in the early morning, can be elevated at night and in the early morning. So you want to get your behaviors and your nutrition correct before you start thinking about supplementation for hormones.
Fadogia Agrestis and Tongkat Ali
With all that said, I'd like to provide some examples of supplements that work directly on specific hormone pathways aimed at achieving more specific goals such as elevated testosterone or elevated free testosterone. I always like to remind people that testosterone and estrogen are present in both males and females, and both are important for things like libido, muscle growth, and so on.
Fadogia Agrestis is an herb that, when taken at dosages of 600 mg per day, many people — not all — report elevated levels of libido, elevated sperm production, elevated testosterone, in some cases elevated estrogen, and a range of hormones downstream of luteinizing hormone. Now, are you going to be a Fadogia Agrestis responder or a non-responder? There's simply no way to know except by trying it.
If you are going to go down this route, there are two very important considerations. First, there is a fairly extensive literature on the fact that Fadogia Agrestis can be toxic to testicular cells and perhaps other cells when taken at very high dosages. So obeying the particular dosages recommended on product labels and cycling Fadogia Agrestis is important. Some people cycle it eight weeks on, two weeks off. Other people opt for twelve weeks on, a month off. Stay within the recommended dosage ranges — you can go lower, but certainly don't go higher. And I think it is wise to cycle every eight weeks or so, come off it for two weeks, and then go back on if that's your choice and you feel it benefited you — or take it for twelve-week periods and then cycle off for a full month before repeating.
Just because there's a recommended dosage of, say, 600 mg per day is not an invitation to take twice as much and expect twice the positive effects. That is not a good approach, especially with something like Fadogia Agrestis which can at high dosages be toxic. It's also important to perhaps consider taking a lower dosage and seeing how that affects your hormones. That approach requires a bit more patience. I know most people are thinking, "I want the effect and I want it now." But I think it's very important when thinking about exercise, nutrition, or supplementation to really play the long game — to think about what's going to work for you in the immediate and in the long term, and to ease into any kind of supplement regimen. Fadogia Agrestis is a good example of a supplement that is known to have potent effects, but you need to approach it with appropriate respect for the fact that the dosage ranges in which it works have to be kept pretty narrow to avoid causing issues.
There are other supplements — in particular Tongkat Ali — which is known to increase free testosterone by reducing sex hormone-binding globulin. Tongkat Ali can be beneficial both for men and for women in dosages anywhere from 200 mg to 600 mg per day. To my knowledge, Tongkat Ali does not need to be cycled, meaning you don't have to take periods of time off from it. I should note that the effects of Tongkat Ali can take a little bit longer to experience, so blood work should perhaps be done eight to twelve weeks after initiating the Tongkat Ali protocol as opposed to earlier. It does seem to have cumulative effects on libido, and that points to the likelihood that it's having some impact on neural pathways as opposed to purely hormone pathways. Hormone pathways can be slow, but in general neural pathways are the ones that explain slow-rising shifts in any kind of physical or mental aspect that then remain stable over time.
A note on supplementation and the female menstrual cycle
As a final note on supplements for hormone augmentation, I want to make a brief mention of something specifically related to female health — which is the menstrual cycle. Across the menstrual cycle, different hormones are present at different levels. Follicle-stimulating hormone is very high during the follicular phase, and then you have the luteal phase. The point I'd like to make is that for women, they should fully expect that certain supplements — not all, but certain supplements — because of the way they impact different hormones, would have different effects, maybe even opposite effects, at different phases of the menstrual cycle. For that reason, I believe it is especially important to have tight control over dosage and individual ingredients in your supplement regimen. This speaks to the critical importance of single-ingredient control, dosage control, and the ability to cease taking individual or multiple ingredients according to the backdrop of your health generally — and obviously the menstrual cycle is a profound shift in the hormonal and thus the entire biological and psychological milieu that exists in the body.
Cognitive enhancement and focus: stimulants vs. neuromodulators
The next category of supplementation I'd like to address is supplements related to cognitive enhancement and focus. Anytime we're having a discussion about supplements for enhancing cognitive ability and focus, a major category of those supplements is going to fall into the stimulant category, and that's going to include most often caffeine, although there are other sources of stimulants.
Let's talk about caffeine. If you want to increase alertness and focus, caffeine is a potent way to do that. It works. The other category of stimulant that can work in terms of enhancing alertness and focus are things that increase adrenaline in some other way — things that touch into or augment the so-called adrenergic and adrenaline systems. There are things like yohimbine and different forms of yohimbine like alpha-yohimbine. I would go to examine.com to explore the different forms of yohimbine. One particular form is called alpha-yohimbine — it sometimes goes by the name rauwolscine, spelled R-A-U-W-O-L-S-C-I-N-E. It is used as a stimulant, often to also promote fat loss and alertness. I have to say that it's a very potent and somewhat precarious supplement. Some people experience a lot of anxiety on it — that could also be because they tend to take it on either an empty stomach or in combination with subcaloric diets. It's sort of getting out on the edge of things that for some people can work not so well. For other people, they might actually find it to be a very effective stimulant.
In general, in terms of supplement-based approaches to increase cognitive function and focus, caffeine — either in coffee or tea form, or in tablet or capsule form at lower dosages than you would find in coffee and tea — is actually a reasonable way to explore stimulant-based approaches for enhancing cognitive function and focus. I mention all that not because I think you probably didn't already know that caffeine can enhance alertness and focus — most people already know that — but rather as a contrast point for the other supplement-based approach for increasing cognitive function and focus, which is to increase certain neurotransmitter pathways that are not stimulant-based.
For instance, alpha-GPC, which is essentially a choline donor, acts in the pathways related to the neuromodulator acetylcholine and can enhance focus. At dosages of anywhere from 300 to 600 mg, people experience heightened levels of focus for mental work or physical work. The half-life of alpha-GPC is about four to six hours, so it's relatively short-lasting, although you wouldn't necessarily want to take it right before bed. It is not a stimulant. It tends to enhance focus by augmenting acetylcholine and acetylcholine pathways specifically. It does create a little bit of an increase in alertness, so some people actually perceive it subjectively as an increase in overall stimulation, but it's different from a caffeine-type stimulant. For instance, 300 mg to 600 mg of alpha-GPC taken alone will allow people to be more focused, but doesn't tend to make people feel jittery or overstimulated.
Similarly, 500 mg to 1,000 mg of something like L-tyrosine — which is an amino acid precursor to dopamine, a different neuromodulator — taken alone, or in conjunction with alpha-GPC if you've already tried them separately and decided they worked well for you, leads people to experience what I'd describe as cholinergic stimulation from alpha-GPC and dopaminergic stimulation from L-tyrosine. Either alone, or combined, tends to produce increased levels of focus without the kind of overall feelings of stimulant-based alertness that one would experience with caffeine.
Of course, there are products out there and people out there that combine all three of these things together — caffeine, alpha-GPC, and L-tyrosine. While I'm not suggesting that's a good or a bad thing, I would suggest that anytime you start to explore the cognitive-enhancing and focus-enhancing effects of any supplement, you ask: which ones are stimulants? — caffeine and alpha-yohimbine, for instance. And which ones tap more into neuromodulator systems, like alpha-GPC and L-tyrosine? And separate those out conceptually, because whereas things like alpha-yohimbine and caffeine will mostly serve the role of increasing levels of alertness but not tightening your focus, things like alpha-GPC and L-tyrosine tend to serve the role of less elevation in alertness but more tightening of focus. This is of course why people often stack these and take them in combination. It's a very important distinction that most people aren't aware of.
I'm not here to tell you that the stimulant-based approach or the neuromodulator-based approach is better or worse — they are simply different from one another. Although I will say that I think it is important to explore them separately before you would start to combine them in a single formula.
I will routinely take 300 mg of alpha-GPC prior to some cognitive work or prior to a workout. I do often combine that with some caffeine — not in capsule or pill form, but rather in the form of a cup of coffee or yerba mate. And it turns out that for me, just by way of example, L-tyrosine is something that works very powerfully to elevate my level of focus, but I tend to crash pretty hard afterward. So I tend to err away from L-tyrosine. But some people tolerate it really well and actually really like it. I rely on something else for dopamine augmentation, which is phenylethylamine, which is a little bit more short-lasting. I arrived at these protocols for myself by mixing and matching, but mostly by trying individual ingredients alone before combining them into any sort of cocktail before a workout or a cognitive work bout. I suggest that you explore them in the same way, because that's going to deliver you to the best possible protocols for you — which only you can determine.
Omega-3 fatty acids: the top single-ingredient recommendation
I do think there's a category of supplements that can greatly enhance the probability of offsetting depression and maybe even improve mood directly or indirectly — there's evidence for this within the scientific literature — and improve metabolic function, cardiovascular function, and also enhance our ability to do focused work. Here I'm referring to the omega-3 essential fatty acids, in particular the omega-3 form. There's now a lot of data showing that ingesting 1 to 3 grams of EPA in particular — in the form of either fish oil capsules or liquid — can be beneficial for a number of different aspects of brain and body health, and can enhance focus and cognitive ability.
The point here is that if somebody has a limited budget to purchase supplements and cannot afford a foundational supplement of the sort we talked about earlier, but they do have a budget that would allow them to purchase a high-quality omega-3 fatty acid fish oil and ingest it in quantities sufficient to get above that 1 gram of EPA per day — this is really important. If you look at product labels, you'll often see 1,500 or 1,600 milligrams of essential fatty acids listed, but the key is the EPA. Make sure that you're above that 1 gram per day EPA threshold.
If I were asked what is the one single-ingredient supplement that serves the greatest role in increasing mental health, physical health, and performance, I would say it's going to be a high-quality omega-3 fatty acid, typically taken in the form of fish oil. Again, you have to decide based on your budget and other factors.
Food-based and food-mimic supplements
I do want to touch on the vast category of supplementation that includes food-based or food-mimic type supplements. This would be, for instance, whey proteins, milk proteins, egg proteins, or plant proteins. That's a discussion that in and of itself deserves an entire episode. If you want to understand which types and sources of proteins are going to be the most bioavailable — the best for protein synthesis, for recovery from exercise, for building muscle — I'd like to refer you to a segment within the episode I did with Dr. Layne Norton, where he talks about total protein needs per day. It's about 1 gram per pound of body weight per day for most people, although there's some variation depending on activity level. The quality and sourcing of those various proteins is extremely important. He actually pointed to some interesting data on potato protein as perhaps being a great plant-based substitute for those who don't want to take whey-based protein. Whey-based proteins can be very useful for getting to and above a protein threshold for all sorts of reasons — not just for muscle building, although it's great for that, but for other purposes as well.
That's but one category of food-based or food-mimic type supplements. There's a huge landscape of this, far too much to get into in any kind of reasonable detail, but I do want to acknowledge that those all exist. The key thing to understand is that while they can serve a great role in providing replacement for meals that you perhaps couldn't have consumed otherwise, and while they are often very convenient because you can drink as opposed to eat your calories, most people would agree that getting some significant fraction of your nutrition from whole foods is going to be useful for a variety of reasons — in particular the fiber that comes along with it, the bulk of the food that tends to make us feel satiated, and the fact that a lot of vitamins, minerals, essential fatty acids, and other things contained within whole foods are not going to be present in most, if not all, of those food-mimic type powders and meal replacements.
The core principles: a framework for rational supplementation
There are a couple of themes that we've talked about a few times during today's podcast that I'd like to reiterate now because they are so crucial to developing a rational supplementation protocol. The most important is that unless we're talking about foundational nutritional support — that is, coverage of vitamins, minerals, digestive enzymes, probiotics, prebiotics, and adaptogens — we should really be focusing on single-ingredient formulations. Foundational supplements that include all those things combined in one supplement are fine. I simply don't see any other practical or reasonable way to get each and every one of those things through single-ingredient formulations. However, when you want to start thinking about and practically exploring things like supplementation for sleep, hormone health, or cognitive function, single-ingredient formulations are going to give you the most power and control. They're going to make sure that you can find the minimal effective doses, that you can rule out things that are not effective for you or that may be detrimental for you in whatever fashion. And it's not just about cost-effectiveness — it's also about arriving at small kits or cocktails of supplements that you can really manage and work with, that you're not dependent on, but that you really feel can augment the various aspects of your health that are important to you.
Today's episode was really geared toward giving you resources and a framework to think about how to approach supplementation, how to navigate sticking points and pain points in supplementation, how to get the most out of your supplementation regimen without spending an excessive amount of money — and if you don't have finances to allow for a lot of exploration of supplements, how to narrow in on the most effective supplements most quickly and derive all the benefits that you can from them.
As a final point: while the word "supplement" makes it sound like these compounds are something just to add on top of or compensate for deficiencies in nutrition or other areas of your life, many of them are actually quite potent compounds. These are potent, non-prescription molecules that really can move the needle in terms of your ability to think more clearly, sleep better, and support your hormone function. But as always, they are just one element within an ecosystem of other factors — such as your behaviors, your nutrition, and maybe even prescription drugs that you also might happen to be taking or hoping to reduce or remove completely. Again, that has to be done in discussion with physicians if you're going to do it at all.
What we call supplements are actually a powerful gear within a larger system aimed at each and every one of us customizing tools for our mental health, physical health, and performance.