What Supplements Should You Actually Take?

Americans spent $55 billion on supplements in 2024, and most of that money was wasted ^[2]. Not because vitamins do not work — because people buy them the same way they buy lottery tickets: grab what looks promising and hope something sticks.

The supplement industry profits from confusion. More confusion means more bottles in the cart. And so the cycle repeats: another multivitamin, another impulse fish oil, another cabinet full of half-finished bottles collecting dust.

Why Generic Supplement Advice Fails

"Everyone should take a multivitamin" fails for an obvious reason: everyone is not the same person. A 25-year-old female distance runner eating mostly plants has wildly different nutritional gaps than a 40-year-old male who sits at a desk and eats steak three times a week. Giving both the same pill is lazy at best, wasteful at worst.

A 2022 meta-analysis in the Annals of Internal Medicine found that general multivitamin use showed no significant reduction in all-cause mortality ^[1]. Vitamins and minerals are not useless — but blasting your body with a little bit of everything is not the same as giving it what it actually lacks.

That is $55 billion mostly spent on products people did not need, at doses that did not move the needle, in combinations that no one tailored to their body ^[2].

What Actually Determines Your Needs

Your nutritional gaps come down to a handful of concrete, measurable factors — not trends, not vibes.

Your Goals

Someone trying to improve sleep needs different compounds than someone chasing muscle recovery or cognitive performance. Magnesium glycinate excels for sleep. Creatine monohydrate is one of the most well-studied performance supplements in existence ^[3]. Omega-3 fatty acids reduce neuroinflammation and support brain health. These are specific tools for specific jobs — a multivitamin does none of them well.

Your Diet

Eat fatty fish twice a week? You probably do not need an omega-3 supplement. Vegan? You almost certainly need B12 — your body cannot get it from plants, full stop. Avoid dairy? Calcium and vitamin D become real concerns. Your diet is the single biggest variable in determining which supplements matter, and most recommendation engines ignore it entirely.

Your Biology

Sex matters. Women of reproductive age need more iron than men. Pregnant women need folate — not folic acid, ideally methylfolate — at doses far beyond what a standard multi provides. Men over 40 benefit from zinc and saw palmetto for prostate health. These are well-established nutritional science, not opinions ^[4].

Your Lifestyle

High-stress jobs burn through B vitamins and magnesium faster. Intense exercise spikes demand for electrolytes, antioxidants, and protein. Live north of the 37th parallel and work indoors? Your vitamin D levels are almost certainly low from October through April ^[5]. A person who surfs in San Diego every morning has different needs than someone coding in a Seattle apartment.

Why 4 Right Pills Beat 12 Random Ones

More supplements does not mean better health — it can mean worse. Excess iron in men drives oxidative stress. Too much vitamin A is genuinely toxic. Calcium supplements without adequate K2 contribute to arterial calcification ^[6]. The "more is more" approach is not just expensive; it can actively harm you.

Precision beats volume. Identify the 3 to 5 compounds that address your actual gaps and take those consistently at the right doses. No pill organizer the size of a tackle box. No $200 monthly subscription for 15 capsules you cannot even name.

A targeted stack of the right supplements, chosen based on your real inputs, will outperform a generic multivitamin every time. Nutrient-specific interventions produce measurable outcomes where broad-spectrum multis do not ^[1].

How to Figure Out What You Need

Get bloodwork done. A basic metabolic panel plus vitamin D, B12, iron, and magnesium levels will tell you more in one appointment than a year of wellness blogs. Request a full thyroid panel too if you can.

Be honest about your diet — not what you ate last Tuesday when you were being good, but what you actually eat most weeks. Track it for 5 days. The gaps will surface fast.

Then match supplements to your specific situation. Not to a trend. Not to what a podcaster is selling. To what your body, your diet, and your goals actually demand.

This is exactly why we built the Stack health assessment. It maps your diet, lifestyle, health goals, and biology against peer-reviewed nutritional science to recommend only what makes sense for you. No filler. No upselling 20 bottles. Just the supplements that will actually move the needle.

not sure what you need? take the stack health assessment →