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Know what's really in your supplements.
We read every label so you don't have to. Spot underdosed formulas, hidden blends and needless fillers before you pay for them, with one clear 0–100 score no brand can buy.
Every label, read for youDoses, forms and fillers, checked line by lineSee how we score 
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Know what you takeEvery ingredient explainedBrowse ingredients 
Cleaner formulasFewer fillers, no surprisesShop top-rated on iHerb Rankings
Best supplements by category
Skip hours of research: the 10 best-labeled options in every category.
Best Magnesium→Best Creatine→Best Ashwagandha→Best Vitamin D→Best Omega-3→Best Protein→Best Probiotics→Best Melatonin→Best Collagen→Best Multivitamins→Best Turmeric→Best Zinc→Best B Vitamins→Best Vitamin C→Best Iron→Best CoQ10→Best Biotin→Best Calcium→Best Greens→Best Pre-Workout→Best Mushrooms→Best Nootropics→Best Amino Acids→Best Joints→Best Digestion→Best Immune→Best Hormones→Best Heart→Best Blood Sugar→Best Antioxidants→Best Liver→Best Eyes→Best Urinary→Best Vitamins A, E, K→Best Minerals→Best Weight→Best Herbs→
Top-rated picks you can buy on iHerb
Our favorite in each category: the highest score you can order today.
Best Vitamin D →
88/100Garden of Life MyKind OrganicsVegan D3 Organic Spray 1,000 IU (25 mcg)Buy on iHerb · $17.49
88/100Garden of Life MyKind OrganicsVegan D3 Organic Spray 1,000 IU (25 mcg)Buy on iHerb · $17.49
Best Omega-3 & Fish Oil →
87/100Nordic NaturalsUltimate Omega-D3 SportBuy on iHerb · $28.86
87/100Nordic NaturalsUltimate Omega-D3 SportBuy on iHerb · $28.86Best Creatine →
89/100Nutricost WomenCreatine 3 g Peach MangoBuy on iHerb · $35.95
89/100Nutricost WomenCreatine 3 g Peach MangoBuy on iHerb · $35.95Best Probiotics →
91/100Ancient NutritionSBO Probiotics ImmuneBuy on iHerb · $26.73
91/100Ancient NutritionSBO Probiotics ImmuneBuy on iHerb · $26.73Best Multivitamins →
90/100Pure SynergyMulti Vita MinBuy on iHerb · $38.95
90/100Pure SynergyMulti Vita MinBuy on iHerb · $38.95What would you like help with?
New tool · Stack Checker
Take more than one supplement?
Each label only tells you about one product. Add everything you take and we'll add up the doses for you, and let you know if anything goes over NIH safe upper limits.
Check my stack, it's free →Browse all categories
Amino Acids→Antioxidants & Longevity→Ashwagandha & Adaptogens→B Vitamins→Biotin→Blood Sugar Support→Brain & Nootropics→Calcium→CoQ10→Collagen→Creatine→Digestive Health→Eye Health→Greens & Superfoods→Heart Health→Herbs & Botanicals→Hormone & Sexual Health→Immune Support→Iron→Joint Support→Liver & Detox→Magnesium→Melatonin & Sleep→Minerals & Electrolytes→Multivitamins→Mushrooms→Omega-3 & Fish Oil→Pre-Workout→Probiotics→Protein Supplements→Turmeric & Curcumin→Urinary Health→Vitamin C→Vitamin D→Vitamins A, E & K→Weight Management→Zinc→
Methodology
4 things we check.
One honest score.
Every score comes from public label data, with the same rules for every brand. Nobody can pay for a higher score, and we show our work so you can check it.
See how we score35
Dosage QualityAre all doses explicitly listed on the label?
25
Label TransparencyServing info, dietary certifications, no hidden blends
25
Formulation CleanlinessFree from artificial fillers, colors, sweeteners
15
Ingredient QualityFormula composition, branded forms, explicit dosing