Trusted Supplement Guide (USA)
Start here
- Vitamins hub — Vitamin D3, C, A, K, B-complex, B12.
- Minerals hub — Magnesium, Zinc, Calcium, Selenium.
- Best vitamins (overview) — rankings based on label transparency & safety.
- How to read a Supplement Facts label.
Popular pages
Why trust this site
- Editorial policy and corrections approach
- Affiliate disclosure transparency
- Contact
Practical checklist
Use this checklist to evaluate Trusted Supplement Guide (USA) content or products more skeptically:
- Label clarity: Does the label state the active form and the per‑serving amount?
- Total intake: Are you stacking multiple supplements that include the same nutrient?
- Safety context: Are interactions, contraindications, or upper intake limits clearly acknowledged?
- Evidence quality: Are claims tied to deficiency prevention, or to broader outcomes that vary by population?
Common pitfalls
Many supplement pages look authoritative but hide key details. Common pitfalls include comparing products by “mg” without checking the elemental amount (for minerals), relying on proprietary blends that obscure exact amounts, or assuming that “natural” automatically means safe. With Trusted Supplement Guide (USA), focus on what is stated clearly, and treat what is implied as uncertain.
Next steps
If you want to go deeper, start with our hubs (vitamins/minerals), then read the evidence summary and safety page relevant to the nutrient. If you have symptoms or take medications, the safest path is to discuss decisions with a qualified clinician rather than self‑diagnosing from online content.
How this site works
This site is organized into hubs (vitamins, minerals), evidence summaries, safety notes, and “best-of” pages. The hubs explain terminology and label basics. Evidence pages summarize what research suggests at a high level and what remains uncertain. Safety pages highlight interactions and “who should avoid” notes. Best-of pages apply a consistent methodology to compare label transparency and formulation choices.
Because supplements are a YMYL topic, we avoid disease claims and we do not promise outcomes. When you see a bold claim on a product page or ad, check the label, look for clear dosing, and verify the claim with reputable sources.