Check supplement and cosmetic ingredients
We read supplement, vitamin and cosmetic labels for you: which form of the nutrient is declared, how much elemental content it actually gives, where the active sits in the ingredient list and what the excipients mean. No marketplace reviews or ratings — only the ingredients and a published method. The products themselves — with a label score — are in the product catalogue.
Blood levels and normal ranges of every nutrient are in Parameters. What the nutrient is for and how to take it is in the articles in Articles. Which tests reveal a deficiency is in Check-ups. What the test on your referral is is explained in Tests. Current number of reviews: 12.
Supplements and vitaminsVitamin D3 by the Label: IU vs mcg, Drops or Capsules, K2 or NotAugust 30, 2026
Supplements and vitaminsOmega-3 by the Label: EPA and DHA per Capsule, Triglycerides or EstersAugust 30, 2026
Supplements and vitaminsCalcium by the Label: Citrate vs Carbonate, Elemental mg, D3 and K2August 30, 2026
Supplements and vitaminsIron Chelate, Bisglycinate or Sulfate: How to Read a Supplement LabelAugust 30, 2026
Supplements and vitaminsCollagen by the Label: Type, Marine or Bovine, Grams per ServingAugust 30, 2026
Supplements and vitaminsZinc Picolinate, Chelate, Citrate or Oxide: Reading the LabelAugust 30, 2026
How we checkHow a Product Score Works: Four Questions About the IngredientsAugust 30, 2026
Supplements and vitaminsCreatine by the Label: Monohydrate vs HCl, Grams and PurityAugust 30, 2026
Supplements and vitaminsVitamin C by the Label: Ascorbic Acid, Sodium Ascorbate or LiposomalAugust 30, 2026
Supplements and vitaminsVitamin B12 by the Label: Methylcobalamin vs Cyanocobalamin, mcgAugust 30, 2026
Supplements and vitaminsMagnesium Citrate, Chelate, Glycinate or B6: Choosing by the LabelAugust 30, 2026
Supplements and vitaminsInositol by the Label: Myo-Inositol vs D-Chiro and the 40:1 RatioAugust 30, 2026