Supplements: Which Ones Are Worth the Money

Walk into any gym and you'll see a shaker bottle hanging off a backpack, a tub of protein in a locker, and a pre-workout packet next to someone's phone on the bench. For a lot of people this has become what being into fitness looks like, and new lifters often believe the powders are a requirement.

They're optional. A few are useful in the right spot. Most are a monthly bill for a benefit you'd never notice, and this is how I sort them with clients.

Why supplements feel necessary

Supplements get marketed as the shortcut, a fat burner for faster loss or a powder that packs on muscle overnight. The message lands hardest on people who feel lost, because when you don't know what works, a product that promises an edge is comforting.

Two facts cut through most of it. First, in the US, supplements don't have to prove they work before they're sold. The regulation covers safety and labeling, and even then companies are largely trusted to police themselves. Second, the effects that do exist are small. A meta-analysis of green tea extract with caffeine, the backbone of most fat burners, found about 1.3 kilograms more weight loss than placebo across 11 trials. That's under three pounds. Three pounds across a whole diet is hard to notice, and the diet itself did the rest.

The problem with stacking

The common mistake is treating more as better. People copy what they see in the gym, so they end up with protein during the workout, a creatine loading cycle they didn't need, BCAAs in the water bottle and a fat burner before cardio. Each one is a small cost for a small claim. Together they're a real cost for the same small claims.

Some of them are claims with nothing behind them. BCAAs sold for a decade on the idea that they build muscle on their own. A 2017 review searched for a human study showing that and found none. Your body needs all the essential amino acids to build tissue, which is a long way of saying eat enough protein.

Where the money does more

If a supplement costs 90 dollars a month and buys a fraction of a pound of fat a year, the same money spent on better groceries, a gym you'll go to, or a few coaching sessions returns more. Supplements go on top of a plan that already works. They don't replace one.

For fat loss the base is a calorie deficit with protein at 0.6 to 1 gram per pound of bodyweight, 150 to 300 minutes of movement a week with two strength days, and seven hours of sleep. Run the Pillar Check before you buy anything. If one of those four is missing, that's where the money and attention go.

The short list that earns a spot

Once the base is in place, a few supplements have enough evidence behind them to be worth the money.

• Creatine monohydrate. The most researched performance supplement there is. It improves strength and repeated high-intensity work, 3 to 5 grams a day does it, and it's safe for healthy people. Skip the fancy forms. The full guide covers how to take it.
• Protein powder. It's food in a convenient form. If you struggle to reach your protein target from meals, a scoop closes the gap. If you hit the target from chicken, eggs, yogurt and beans, you don't need it. My protein cheat sheet makes the whole-food route easier.
• Caffeine. Cheap, well studied, and it improves training performance for most people. Coffee counts. Up to about 400 mg a day is considered safe for most healthy adults; use less if you're pregnant, have a heart condition or anxiety, or it costs you sleep.
• Fish oil and a basic multivitamin. Reasonable for general health if your diet is thin on fish or vegetables, and neither changes your body composition.

Greens powders get a lot of airtime. They're a weak stand-in for vegetables, and the fiber that makes vegetables useful for fat loss is mostly missing. Buy the vegetables.

How to buy without getting burned

Because the shelf isn't pre-screened, buy products that carry a third-party testing seal such as NSF Certified for Sport or Informed Sport. Those programs test that the tub contains what the label says and nothing banned. Plain creatine monohydrate and plain whey are cheap. A long ingredient list is a reason to be suspicious.

Before you spend another 60 to 100 dollars on a product with a dramatic name, ask whether your protein, training, steps and sleep are where they should be. If they are, creatine and maybe a protein powder are the only things on this list that will change anything you can measure.

Sources

1. Kreider et al., Journal of the ISSN, 2017. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation. Creatine monohydrate is the best-supported performance supplement; 3 to 5 g a day, safe in healthy people.
2. Jäger et al., Journal of the ISSN, 2017. International Society of Sports Nutrition position stand: protein and exercise. Protein powder is a convenient way to hit a daily protein target; whole food works just as well.
3. Hursel et al., International Journal of Obesity, 2009. The effects of green tea on weight loss and weight maintenance: a meta-analysis. Green tea catechins with caffeine: about 1.3 kg (under 3 lb) more weight loss across 11 trials, a small effect.
4. Wolfe, Journal of the ISSN, 2017. Branched-chain amino acids and muscle protein synthesis in humans: myth or reality?. No human evidence that BCAAs alone build muscle.
5. Antonio et al., Journal of the ISSN, 2025. Common questions and misconceptions about dietary supplements and the industry. US supplements are not pre-approved for effectiveness; third-party testing is how you check what is in the tub.
6. Guest et al., Journal of the ISSN, 2021. International Society of Sports Nutrition position stand: caffeine and exercise performance