Category: For You
The supplements that genuinely help trained, active people fit on a short list, led by creatine and protein. Here is what earns its place, what to skip, and why the foundations beat every tub.
Category: Demographic | Reading time: ~13 min | Level: Intermediate
Walk into any gym and you will find people who track their macros to the gram, sleep six hours, and spend more on supplements than on coaching. The supplement industry loves the serious trainee, because the serious trainee is motivated, disciplined, and willing to believe that the last two per cent of results is hiding in a tub. Occasionally it is. Usually it is not. The genuinely useful list for athletes and active people is short, cheap and boring, and the long, exciting list is where most of the money goes and most of the disappointment lives.
The honest hierarchy looks like this. Training quality, total diet, sleep and recovery do almost all the work. Being replete in the nutrients that quietly govern performance, iron and vitamin D chief among them, protects you from the kind of deficit that flattens output. Only after those are handled do supplements offer a real, marginal edge, and only a handful of them do. This guide names the ones that earn their place, explains why, and then does the more useful job of naming the ones that do not, so you can stop paying for them.
None of this is about treating illness or replacing medical advice. It is about spending a training budget where the evidence actually points, and being honest that the flashiest products are usually the weakest.
A sports supplement is meant to support one of a few things: fuel for hard efforts, the raw material for muscle repair and growth, recovery between sessions, or a specific acute performance edge. The term for that last category is an ergogenic aid, and it is worth knowing that only a small number of substances have strong evidence of genuinely improving performance. The International Olympic Committee's expert consensus recognises a short list, including creatine, caffeine, dietary nitrate, beta-alanine and bicarbonate, as having meaningful evidence in specific contexts, and treats the vast remainder of the market as unproven [4].
The single most important idea is proportion. Supplements are a top-up on a foundation, not a foundation in themselves. A well-trained person eating enough, sleeping enough and not carrying a nutrient deficiency has already captured the large majority of available gains. That is why the useful supplements are the ones that either fill a specific gap or add a small, reliable increment on top of good basics, and why the products promising transformation are, almost by definition, overpromising.
If a single supplement has earned its reputation through evidence rather than marketing, it is creatine monohydrate. It works by helping regenerate ATP, the fast energy currency your muscles burn during short, intense effort, so supplementing raises the muscle's capacity for repeated hard contractions. The result, across a large and consistent body of research, is improved performance in strength and power work and a modest boost to the gains from resistance training. The International Society of Sports Nutrition's position stand describes creatine monohydrate as the most effective ergogenic nutritional supplement available for increasing high-intensity exercise capacity and lean mass during training [1], and an earlier meta-analysis by Branch confirmed the strength and body-composition benefits, most pronounced for short-duration, high-power activity [2].
Its safety record is one of the best in the category. Years of study in healthy people have not borne out the common worries about kidney damage or dehydration at standard doses; the main reliable effect beyond performance is a small gain in body water and weight early on. The practical version is simple and cheap: around three to five grams of monohydrate a day, taken consistently, with no need for elaborate loading or expensive "advanced" forms that cost more and do no more. Creatine suits power, sprint and resistance work far more than pure endurance, and it is one of the few supplements where the confident claims are actually backed.
Protein powder is the best-selling sports supplement for a reason, and the reason is convenience rather than magic. A large meta-analysis by Morton and colleagues found that protein supplementation modestly increased the strength and muscle gains from resistance training in adults [3]. But read the finding carefully: the benefit is mediated by total daily protein intake. Supplementation helps mainly when it lifts you to an adequate daily target you would otherwise miss, and its extra effect fades once you are already eating enough.
That reframes the whole product. Whey and other powders are a fast, complete, convenient way to hit a sensible daily protein target, useful if you struggle to get there from meals, if you train fasted, or if you are busy. They are not a special muscle-building substance that food lacks. If your diet already reaches your target from meat, fish, dairy, eggs, legumes and the like, adding powder on top buys you very little. Spend on it as a convenience tool, sized to the gap in your diet, not as a growth accelerator.
Omega-3 fatty acids, the EPA and DHA from fish oil, get folded into a lot of athlete stacks with claims about recovery and inflammation that run ahead of the evidence. The honest position, drawn from the primary nutrition authority, is that omega-3 has a limited, supporting role rather than a performance one. Its genuinely strong effect is lowering triglycerides, and its cardiovascular benefit is real but population-specific; the joint and recovery claims are adjunctive at best [5]. There is no solid evidence that everyday omega-3 makes a well-fed athlete measurably faster or stronger.
Where it fits is as a general wellness support with a good safety profile at everyday doses. The one thing to keep in mind is dose: the atrial fibrillation and bleeding signals in the literature appear at high intakes above roughly one to one-and-a-half grams a day of combined EPA and DHA, concentrated in people at cardiovascular risk, so a modest everyday dose sits well clear of them [5]. Treat omega-3 as a reasonable health add-on, not as an ergogenic aid, and do not let a "recovery" label talk you into megadosing it.
Here is where an honest guide earns its keep. Branched-chain amino acids are marketed relentlessly, but whole protein already contains them alongside every other amino acid you need, and BCAAs on their own do not build muscle better than adequate total protein. For anyone hitting a sensible protein target, they are largely redundant. Testosterone boosters are a category built on hope: most have little or no evidence of actually raising testosterone or performance in healthy men. Ketone drinks are expensive and, for most athletes, unimpressive in the data. And a large share of proprietary "recovery" and "pre-workout" blends hide under-dosed ingredients behind a proprietary label, so you cannot even tell what you are getting.
There is also a purity problem specific to this corner of the market. Sports supplements are a recognised source of contamination and undeclared ingredients, including substances banned in competition. If you compete under anti-doping rules, that is not a theoretical risk, and the sensible response is to stick to products independently batch-tested through a recognised certification scheme and to be especially wary of exotic blends promising dramatic effects. The general rule holds: the more transformative the claim, the thinner the evidence tends to be.
Order your spending by evidence, not by excitement. First, secure the foundations that actually determine performance: consistent training, enough total calories and protein, real sleep, and freedom from the deficiencies, iron and vitamin D above all, that quietly sabotage output. A tired, under-fed, iron-deficient trainee will not be rescued by any supplement, and testing and correcting a genuine deficiency will do more than any tub on the shelf.
Then, if you want a supplement edge, keep it short. Creatine monohydrate at three to five grams a day is the single best-evidenced addition for strength and power work. A protein powder is worth it only if you genuinely struggle to reach your daily protein target from food. A modest omega-3 is a reasonable general health add-on. Recognised acute aids like caffeine have their place in specific events. That is close to the whole list worth paying for, and it is deliberately unexciting.
Finally, match the tool to your sport and your reality. Power and strength athletes get more from creatine than endurance athletes do. Everyone gets more from sleep than from any capsule. And if you compete, purity and certification matter as much as the ingredient itself.
Pregnant, breastfeeding, or on medication? Check with a healthcare professional first. Specific flags for active people: anyone with kidney disease should discuss creatine with a clinician rather than assuming the healthy-population safety data applies. High-dose omega-3, above roughly one to one-and-a-half grams a day, can add to the effect of blood thinners and carries a small atrial fibrillation signal in people at cardiovascular risk. Iron should never be taken on a guess; it needs a documented deficiency, because supplementing iron you do not need offers no benefit and carries real harm. And if you compete, choose independently tested products to avoid contamination.
We are not going to pretend a stack of ten products will do what training and sleep do. The honest athlete list is short, and most of it is cheap. Where our Remedy Library is useful is in helping you separate the handful of evidence-backed options from the marketing around them, and in flagging the safety details, like iron never being a guess and omega-3 dose thresholds, that the labels tend to bury.
If you want to sanity-check a product before you buy it, Remy can talk you through the evidence grade for any single ingredient, and the Custom Remedy Maker can help you build a minimal, sensible approach around your actual training and diet. The best outcome here is a smaller basket and a bigger focus on the things that are free: sleep, consistency, and eating enough of the right food.
1. Kreider RB, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr. 2017. Describes creatine monohydrate as the most effective nutritional ergogenic aid for high-intensity capacity and lean mass, with a strong safety record. 2. Branch JD. Effect of creatine supplementation on body composition and performance: a meta-analysis. Int J Sport Nutr Exerc Metab. 2003. Confirms strength and body-composition benefits, greatest for short-duration high-power work. 3. Morton RW, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength. Br J Sports Med. 2018. Finds a modest benefit mediated by total daily protein intake. 4. Maughan RJ, et al. IOC consensus statement: dietary supplements and the high-performance athlete. Br J Sports Med. 2018. Recognises a short list of evidence-backed performance aids and treats most of the market as unproven, with contamination a noted risk. 5. NIH Office of Dietary Supplements. Omega-3 Fatty Acids: Fact Sheet for Health Professionals. 2024. Basis for the limited, supporting role of omega-3 and the dose-dependent atrial fibrillation and bleeding cautions.
A short list has real evidence: creatine monohydrate for strength and power, protein to help meet a daily target, and a handful of performance aids like caffeine that sports bodies recognise. Beyond that, most products are weakly evidenced. The unglamorous foundations, training, sleep, total diet and being iron and vitamin D replete, out-perform almost everything in a tub.
Yes on both, for most healthy people. Creatine monohydrate is one of the most studied sports supplements, with consistent evidence that it improves strength and power output during training, and a strong safety record over years of research. The common worries about kidney damage and dehydration are not supported in healthy people at standard doses. It suits power and resistance work more than pure endurance.
No, but it can help you hit a daily protein target conveniently. Analyses show protein supplementation modestly increases strength and muscle gains from resistance training, and the effect is really about total daily protein, which food can supply just as well. Powder is a convenience, not a magic ingredient. If your diet already reaches your target, extra powder adds little.
For most people eating enough total protein, no. Branched-chain amino acids are marketed hard, but whole protein already contains them alongside the rest, and BCAAs alone do not build muscle better than adequate total protein. If you are hitting a sensible protein target from food or a complete protein powder, separate BCAAs are largely redundant.
Be sceptical. Most "testosterone boosting" supplements have little to no evidence of raising testosterone or performance in healthy men, and many proprietary recovery blends stack under-dosed ingredients behind impressive labels. The reliable recovery tools are sleep, adequate calories and protein, and sensible training load, none of which come in a branded tub.
Fix the foundations, then add creatine. Make sure your total diet, sleep and training are sound and that you are not iron or vitamin D deficient, because a deficiency quietly wrecks performance. Then creatine monohydrate is the single best-evidenced addition, and a protein powder if you struggle to hit your daily target from food. That covers most of the real gains available from supplements.
Not automatically, and purity is a real issue in this category. Sports supplements are a known source of contamination and undeclared ingredients, some of which are banned substances. If you compete under anti-doping rules, use products independently tested through a recognised certification scheme, and treat exotic proprietary blends with particular caution.
No, and this is the most expensive mistake in the category. Sleep, total calories and protein, and consistent training drive the results; supplements are a small top-up on top of those. Spending on products while under-sleeping and eating erratically is paying for the least important variable while neglecting the most important ones.