If you buy nothing else, buy these. Creatine, magnesium glycinate and vitamin D3 have more human evidence behind them than anything on a supplement-store endcap — and bought as bulk powder they cost about what a single fancy gummy does. This is the foundation the whole site is built to point you toward.
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| Ingredient | Dose | Bulk cost/serving |
|---|---|---|
| Creatine Monohydrate Most-researched supplement there is — strength, muscle, and increasingly cognition. Buy → |
5 g/day | $0.23 |
| Magnesium Glycinate Highly absorbable magnesium for sleep and relaxation; most people run low. Buy → |
300 mg/day | $0.11 |
| Vitamin D3 Cheap insurance for immunity and bone health, especially in winter. Buy → |
2,000 IU/day | $0.04 |
| Whole stack | $0.38/day |
Doses are the per-serving amounts studied for each ingredient — tap any name for the evidence, sourcing, and what people actually report. Bulk prices last verified 2026-09-03.
Decode a supplement you already own Browse all gradesEducational only — not medical advice. Grades and clinical doses are computed from public labels against sourced research (citations on the main site); prices last verified 2026-09-03. Expensive Powder has no sponsors; bulk links may earn an affiliate commission, which never affects a grade. Talk to a clinician before starting any supplement.