Supplement labels contain critical information about what you're putting in your body. But they're designed to be confusing. This guide breaks down every section so you can make informed decisions.
1. Supplement Facts Panel
Serving Size
The most overlooked part of the label. If the serving size is "2 capsules" but you only take 1, you're getting half of every listed nutrient. Always check this first.
Amount Per Serving
The actual amount of each nutrient per serving. Compare this to the % Daily Value to understand if the dose is meaningful.
% Daily Value (%DV)
Based on a 2,000 calorie diet. 100% DV means the supplement provides the full recommended daily amount. Some nutrients (like vitamin D or magnesium) are commonly under-dosed in cheap supplements.
2. Other Ingredients (Inactive Ingredients)
This is where red flags hide. "Other ingredients" includes everything in the product that isn't an active nutrient:
- Fillers — silicon dioxide, magnesium stearate, rice flour (used to fill capsules cheaply)
- Coatings — shellac, carnauba wax, titanium dioxide (used for appearance)
- Artificial colors — Red 40, Yellow 5, Blue 1 (unnecessary and potentially harmful)
- Artificial sweeteners — sucralose, acesulfame K (common in gummies and chewables)
- Allergens — soy lecithin, milk derivatives, wheat starch (check if you have allergies)
3. Certifications to Look For
- NSF Certified / NSF Certified for Sport — independent lab verification of contents and purity
- USP Verified — United States Pharmacopeia testing for identity, strength, and purity
- ConsumerLab Approved — independent quality testing
- GMP Certified — Good Manufacturing Practices (minimum standard; less rigorous than NSF/USP)
- Non-GMO Project Verified — no genetically modified ingredients
- USDA Organic — certified organic ingredients
4. Warnings & Allergens
Always check the bottom of the label for:
- Allergen warnings ("Contains: milk, soy, tree nuts")
- "May contain" statements (cross-contamination risk)
- Drug interaction warnings
- Pregnancy/nursing warnings
- "Not intended to diagnose, treat, cure, or prevent any disease" (required FDA disclaimer)
5. Red Flags on Supplement Labels
- Proprietary blends — lists ingredients without individual amounts. You don't know how much of each ingredient you're getting.
- No 3rd party testing — no NSF, USP, or ConsumerLab certification. No proof the label is accurate.
- Excessive claims — "miracle", "cure", "doctor recommended" without evidence.
- Artificial colors in supplements — there's no reason a vitamin needs Red 40.
- Added sugar in gummies — many gummy vitamins have 3-4g sugar per serving.
- "Natural" without certification — "natural" is not regulated by the FDA for supplements.
The Fastest Way to Read a Supplement Label
Instead of decoding every ingredient manually, scan the product with Product Scans. In 3 seconds you get:
- Health Score (0-100) based on all ingredients
- Ingredient red flag detection (artificial colors, sweeteners, preservatives)
- 3rd party testing verification (NSF, USP, ConsumerLab)
- FDA recall check
- Allergen warnings
- Healthier alternatives when available
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