The Only Supplements Worth Your Money

The supplement industry generates tens of billions of dollars annually by selling promises of faster results, better recovery, and easier gains. Most of those promises are not supported by evidence. The vast majority of supplements are unnecessary if your nutrition is solid. But a small handful have earned their place through decades of rigorous research.

Here are the supplements that are actually worth your money and, just as importantly, the ones that are not.

Creatine Monohydrate

Creatine is the single most researched sports supplement in history, with hundreds of peer-reviewed studies confirming its safety and effectiveness. It works by increasing your muscles' stores of phosphocreatine, which helps regenerate ATP during short bursts of intense effort. The practical result is that you can do a few more reps or push slightly heavier weight, which adds up to meaningfully more training volume over time.

The standard protocol is 3 to 5 grams per day, every day. There is no need to load or cycle. Creatine monohydrate is the form you want. Fancier versions like creatine HCL or buffered creatine offer no proven advantage despite their higher price tags.

Protein Powder

Protein powder is not magic. It is food in a convenient form. If you can hit your daily protein target through whole foods alone, you do not need it. But for many people, getting 0.7 to 1 gram of protein per pound of body weight from meals alone is a logistical challenge. A scoop of whey or plant-based protein in a shake makes hitting that target dramatically easier.

Whey protein is the most studied and offers a complete amino acid profile with high bioavailability. Casein digests more slowly and works well before bed. Plant-based options like pea and rice protein blends are viable alternatives for those who avoid dairy.

Vitamin D

Vitamin D deficiency is remarkably common, especially in northern latitudes and among people who spend most of their time indoors. Low vitamin D levels are associated with reduced muscle function, impaired immune response, and poor bone health.

If a blood test confirms you are deficient, supplementing with vitamin D3 (typically 1,000 to 5,000 IU daily depending on severity) can improve energy, immune function, and mood. This is not a universal recommendation, though. Get tested before supplementing, and work with your doctor on dosing.

Caffeine

Caffeine is a well-established performance enhancer. It increases alertness, reduces perceived exertion, and improves both strength and endurance performance. A dose of 3 to 6 milligrams per kilogram of body weight taken 30 to 60 minutes before training is the research-backed range.

The cheapest and most practical source is coffee. Pre-workout supplements often contain caffeine alongside a long list of other ingredients with little to no evidence behind them. A cup of black coffee gets the job done without the markup.

Magnesium

Magnesium plays a role in over 300 enzymatic reactions in the body, including muscle contraction, protein synthesis, and nervous system regulation. Many people are mildly deficient due to modern diets low in whole grains, nuts, and leafy greens.

Supplementing with magnesium glycinate or magnesium threonate before bed can improve sleep quality and support recovery. Better sleep means better training performance the next day and more effective muscle repair overnight.

What About Everything Else?

BCAAs, fat burners, testosterone boosters, greens powders, and most of what fills supplement store shelves fall into the category of "not enough evidence" or "only works under very specific conditions that probably do not apply to you." Save your money.

The hierarchy of importance is clear: sleep, nutrition, training, and consistency. Supplements sit at the very top of the pyramid, contributing the smallest fraction of your results.

How TRL/Active Approaches Nutrition

TRL/Active takes a food-first approach to nutrition. The app's meal planning system builds your daily meals around whole, nutrient-dense ingredients that provide the protein, carbohydrates, fats, vitamins, and minerals your body needs to train and recover.

When your nutrition is dialed in through real food, the list of supplements worth taking shrinks to almost nothing. TRL/Active helps you build the foundation that makes most supplements redundant, so you can spend your money on groceries instead of pills and powders.