The supplement aisle is built to sell you twenty products when three would do. Creatine, protein and omega-3 have real evidence behind them and cost about $15 a month bought on value. Greens powders, BCAAs, pre-workout and premium multivitamins can run ten times that for no added benefit. Here is exactly what to buy, cheaply, and what to skip.
None of this is anti-supplement. It is anti-overpaying. A handful of supplements genuinely help, and even those are commodities where the store brand or bulk version works identically to the flashy tub. Everything below links to the full cost study where we have one, with the live per-unit numbers.
| Supplement | Worth it? | Cheapest smart pick | The catch |
|---|---|---|---|
| Creatine | Yes | Bulk monohydrate, ~$0.10/dose | Same molecule in every tub |
| Protein powder | If short on protein | Value whey, ~$0.60/serving | Food first, powder to top up |
| Omega-3 (fish oil) | For most | Concentrated, ~$0.35/g EPA+DHA | Buy per gram, not per capsule |
| Vitamin D3 | If low / little sun | Store brand, pennies a day | Get a blood test first |
| Magnesium | Helps many | Glycinate, cheap | Skip the fancy blends |
| Multivitamin | Optional insurance | Store brand | Identical to the premium ones |
| BCAAs | Skip | Already in your protein | |
| Greens powder (AG1) | Overpriced | ~$100/mo; eat veg + a multivit | |
| Pre-workout | Mostly caffeine | Coffee + citrulline | A $2 scoop is ~20¢ of caffeine |
| Fat burners / test boosters | Don't work | Save your money |
Not medical advice. "Worth it" is about evidence and value for a healthy adult; your needs may differ, and a doctor or a blood test beats guessing, especially for vitamin D. Prices are typical US value-buys in USD.
The most studied supplement in sport, and it is dirt cheap. Creatine monohydrate is the exact same molecule in every tub, so the branded, flavored and gummy versions are pure markup, up to seven times the price for no extra effect. Buy plain bulk monohydrate.
Not magic, just convenient protein. If you already hit your protein target from food you do not need it; if you struggle to, a powder is the cheapest easy way to top up. Value whey costs a fraction of premium isolates or plant powders for the same grams of protein, so buy on cost per gram.
Good evidence for heart and general health, but the label is a trap. A "1000mg fish oil" capsule may hold only 300mg of actual omega-3, so cheap low-concentration bottles can cost more per gram of EPA+DHA than concentrated ones. Buy by cost per gram of EPA+DHA, not per bottle.
Vitamin D3, magnesium and a basic multivitamin can help if you are low or as light insurance, but they are commodities. A store-brand vitamin D is chemically identical to a $30 boutique bottle. Get a blood test before megadosing vitamin D, choose magnesium glycinate over fancy blends, and never pay a premium for a multivitamin, the cheap one is the same.
Cheap vitamin D3 Magnesium glycinateThe biggest overpayment in the aisle. At around $3 a serving, roughly $100 a month, a greens powder is essentially a pricey multivitamin with some plant extracts and probiotics. A store-brand multivitamin plus actually eating vegetables covers the same ground for a few dollars a month. Convenient and inoffensive, but you are buying marketing.
Branched-chain amino acids are already in any complete protein, including your protein powder, meat, eggs and dairy. For anyone eating enough protein they add almost nothing. Put the money toward more total protein instead, it is cheaper and does more.
A pre-workout is mainly caffeine, plus citrulline for pump and sometimes beta-alanine for the tingles. A $2 scoop delivers about 20 cents of caffeine. If you want the effect, a strong coffee and cheap bulk citrulline gives you the same for a fraction, without the proprietary-blend mystery dosing.
These are where the industry earns its worst reputation. The evidence for meaningful fat loss or testosterone increase from over-the-counter pills is thin to none. Sleep, protein and training move those needles; the pills mostly move money.
Buy the two or three supplements with real evidence, in their cheapest commodity form, and ignore the rest until a specific need and ideally a blood test says otherwise. The supplement industry is enormous because it sells hope and convenience at a huge markup. The stuff that works is boring and cheap.
For most people, three: creatine, a protein powder if you are short on protein, and omega-3 fish oil, about $15 to 20 a month combined on value. Vitamin D and magnesium if you are low. Almost everything else is optional or a waste.
For value, no. At ~$3 a serving (~$100/month) a greens powder is an expensive multivitamin with plant extracts. A store multivitamin plus eating vegetables does the same for a few dollars a month.
For anyone eating enough protein, essentially yes. BCAAs are already in your protein, meat, eggs and dairy. Spend on more total protein instead.
The three proven basics run about $15 to 25 a month bought on value. A shelf of greens powders, BCAAs, pre-workout and premium multivitamins can hit $150 for no extra benefit.
Store brand vs name brand → · See all usefulHQ cost studies →