Supplements: what actually works vs what's marketing hype.

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THE SUPPLEMENT INDUSTRY PLAYBOOK

Before we get into specific supplements, you need to understand how this industry operates because it's fundamentally different from pharmaceuticals and it explains why so much of what's sold is questionable.

Dietary supplements in the United States are not regulated the way prescription drugs are. The FDA doesn't test supplements for safety or effectiveness before they hit the market. Companies can make nearly any claim they want as long as they include a tiny disclaimer that says "These statements have not been evaluated by the Food and Drug Administration" somewhere on the label.

This means a company can create a supplement, fill it with cheap ingredients that may or may not do what the label claims, spend heavily on marketing to make it look legitimate, and sell it without ever proving it works. If the supplement turns out to be dangerous or completely ineffective, the FDA can step in after the fact, but by that point the company has already made millions.

The second part of the playbook is proprietary blends. You'll see supplements that list a blend of ten ingredients with impressive names but they don't tell you how much of each ingredient is in there. They just list the total amount of the blend. This allows companies to include a tiny amount of expensive effective ingredients and bulk up the rest with cheap fillers while making it look like you're getting a powerful formula.

The third tactic is cherry-picking research. A company finds one small study with twenty participants that showed their ingredient might possibly have some minor effect under very specific conditions. They put "research-backed" on the label and cite that one study while ignoring the five larger studies that showed no effect. Most consumers don't check the actual research. They see "clinically proven" and assume it means something.

Understanding these tactics helps you see through the marketing and focus on what actually matters, which is whether independent research consistently shows a supplement works and whether the effect size is meaningful enough to justify the cost.

WHAT ACTUALLY WORKS

Let's start with the short list of supplements that have legitimate research backing and actually deliver measurable results for most people.

Protein powder is not technically a supplement in the traditional sense. It's just concentrated protein from milk, eggs, or plants. But it belongs on this list because it's the most cost-effective way to increase your protein intake when getting enough from whole food is difficult or inconvenient. If you're trying to hit 100 to 120 grams of protein daily and you're falling short, a scoop or two of protein powder in a smoothie or mixed with water solves that problem for about one dollar per serving.

The key is buying unflavored or minimally processed versions without a bunch of additives. You don't need the version with added BCAAs, glutamine, digestive enzymes, and whatever else they stuffed in there to justify charging sixty dollars for two pounds of protein. Plain whey protein isolate or a quality plant-based blend does the same job for half the price.

Creatine monohydrate is one of the most researched supplements in existence and the evidence is overwhelming that it works. Taking 5 grams of creatine daily increases the amount of creatine phosphate stored in your muscles, which gives you slightly more energy for high-intensity exercise. This translates to being able to do one or two more reps during strength training or sprint slightly harder during intense cardio.

The effect is modest but real and consistent across hundreds of studies. You're not going to transform your body from creatine alone, but if you're already training hard and eating well, creatine gives you a small edge that compounds over time. A year of being able to do one extra rep per set adds up to meaningful strength gains. Cost-wise, creatine is dirt cheap. A kilogram costs about twenty dollars and lasts six months. That's about three dollars per month for a supplement that genuinely works.

Vitamin D is worth supplementing if you live anywhere that has actual winter or if you work indoors most of the day. Your body makes vitamin D from sun exposure but most people don't get enough, especially in northern climates or if you're darker skinned which requires more sun exposure to produce the same amount of vitamin D. Low vitamin D is associated with weakened immune function, poor bone health, and mood issues.

Taking 2,000 to 4,000 IU of vitamin D3 daily is cheap insurance. A year's supply costs about fifteen dollars. Get your levels tested if you want to be precise about dosing, but for most people supplementing in this range is safe and fills a gap that's hard to fill through food alone since very few foods contain meaningful amounts of vitamin D.

Magnesium is another mineral that many people are deficient in because modern farming practices have depleted soil magnesium levels and most people don't eat enough magnesium-rich foods. Magnesium plays a role in over 300 enzymatic reactions in your body including muscle function, sleep quality, and stress response.

Supplementing with 400 to 500 milligrams of magnesium glycinate before bed can improve sleep quality and help with muscle recovery. This is especially relevant if you're training hard or if you have trouble staying asleep. Cost is minimal, about fifteen to twenty dollars for a three-month supply.

Fish oil or omega-3 supplements have mixed research but lean positive for most people especially if you don't eat fatty fish regularly. The evidence suggests omega-3s support cardiovascular health, reduce inflammation, and may help with joint health. The effect sizes are modest and you can get the same benefits from eating salmon or sardines twice weekly, but if you're not doing that, a fish oil supplement is a reasonable addition.

Buy a quality brand that's been tested for mercury and other contaminants. Cheap fish oil often tastes terrible and may have quality issues. Expect to pay twenty to thirty dollars monthly for a good fish oil supplement that provides 2 to 3 grams of EPA and DHA combined.

That's essentially the list. Protein powder, creatine, vitamin D, magnesium, and maybe fish oil. Five supplements total. Everything else ranges from questionable to completely useless for the average person trying to lose fat and build muscle. #evidencebased

WHAT'S MARKETING HYPE

Now let's talk about what doesn't work despite the aggressive marketing and impressive-sounding claims.

Fat burners are perhaps the most egregious example of supplement industry nonsense. These products promise to boost your metabolism, increase fat burning, and accelerate weight loss. They're usually loaded with caffeine, sometimes dangerous amounts, plus a proprietary blend of herbs and extracts with exotic names that sound scientific but have minimal research supporting them.

The reality is that any metabolic boost from these ingredients is tiny, usually less than 50 calories per day, and comes almost entirely from the caffeine. You could get the same effect from drinking two cups of coffee for fifty cents instead of spending sixty dollars on a month's supply of fat burner pills. The rest of the ingredients are either unstudied or have been studied and shown to have no meaningful effect on fat loss.

More importantly, fat burners don't address the actual mechanism of fat loss which is being in a calorie deficit consistently over time. No supplement changes that fundamental requirement. Taking fat burners while eating in a surplus will not make you lose fat. Eating in a deficit without fat burners will make you lose fat. The supplement is irrelevant.

BCAAs or branched-chain amino acids are marketed heavily to people who lift weights with claims about muscle recovery, muscle building, and preventing muscle breakdown. The problem is that BCAAs are just three of the nine essential amino acids your body needs to build muscle. Taking BCAAs without the other six essential amino acids doesn't provide your body with the complete building blocks for muscle protein synthesis.

If you're eating adequate protein from whole foods or protein powder, you're already getting all the BCAAs you need plus the other essential amino acids. Adding more BCAAs on top of that doesn't add any benefit. Multiple studies have shown that BCAA supplementation doesn't improve muscle growth or recovery compared to just eating enough total protein. Yet BCAA supplements cost thirty to fifty dollars per container and the marketing is everywhere.

The only scenario where BCAAs might make sense is if you're training fasted and you want some amino acids in your system without breaking your fast completely. But even then, you'd get better results from just having a small amount of whey protein or eating breakfast.

Testosterone boosters sold over the counter are almost universally ineffective at actually increasing testosterone levels in any meaningful way. These products usually contain herbs like tribulus terrestris, fenugreek, or ashwagandha along with zinc and vitamin D. While some of these ingredients may have small effects on testosterone in people who are deficient in those specific nutrients, they don't significantly boost testosterone in healthy men with normal levels.

The few studies that show any effect are small, poorly controlled, or funded by the companies selling the supplements. Independent research consistently shows no meaningful increase in testosterone or muscle building from these products. Yet they sell for fifty to eighty dollars per bottle based on marketing that preys on men's concerns about declining testosterone as they age.

If you genuinely have low testosterone, you need to see a doctor and potentially get prescribed actual testosterone replacement therapy. Over-the-counter supplements are not going to solve that problem.

Detox supplements and cleanses are based on a complete misunderstanding of how your body works. Your liver and kidneys are constantly detoxifying your blood. That's their primary job and they're very good at it. You don't need activated charcoal or milk thistle or whatever detox tea is being advertised on Instagram to help your organs do what they already do automatically.

These products often work by causing digestive distress that makes you lose water weight quickly, which people interpret as detoxing when really it's just dehydration and potentially some mild diarrhea. Any weight you lose from a detox cleanse comes back immediately when you return to normal eating because it was water, not fat.

Save your money. Your body detoxes itself for free. If your liver and kidneys aren't functioning properly, you need medical attention, not a supplement.

Greens powders that claim to replace vegetables are expensive ways to consume dehydrated vegetables that have lost most of their beneficial properties through processing. A container of greens powder costs forty to sixty dollars and lasts thirty days. You could buy actual fresh vegetables for that price and get better nutrition, more fiber, more volume that fills you up, and food that actually tastes like food.

The marketing for greens powders shows them as convenient nutrition for busy people, but realistically you can eat a salad or steam some broccoli in less time than it takes to mix a greens powder drink and clean the shaker bottle. The supplement is solving a problem that doesn't really exist for most people.

HOW TO DECIDE WHAT TO BUY

Given that most supplements are questionable at best and scams at worst, how do you make intelligent decisions about what's worth buying?

Start by asking whether the supplement addresses an actual gap in your nutrition that would be difficult or expensive to fill through food. Vitamin D is hard to get from food and requires specific sun exposure, so supplementing makes sense. Protein powder makes hitting high protein targets easier when you're busy. Magnesium is depleted in modern food and supplementing is cheaper than eating five cups of spinach daily.

But fat loss from a fat burner? That's accomplished through food choices and a calorie deficit, not a supplement. Muscle building from BCAAs? That comes from adequate total protein and progressive strength training, not amino acid pills.

Second, look for supplements with extensive independent research, not just company-funded studies. Creatine has hundreds of studies from universities and research institutions showing consistent benefits. Most proprietary blends have one or two small studies funded by the company selling the product.

Third, consider cost versus benefit. Creatine costs three dollars per month and has proven benefits. A greens powder costs fifty dollars per month and offers nothing you couldn't get from ten dollars worth of actual vegetables. The math is straightforward.

Fourth, be skeptical of anything marketed with before and after photos, proprietary blends, or phrases like "revolutionary formula." These are red flags that indicate marketing over substance.

What supplements are you currently taking let me know by replying to this mail 😊

Sarah