Read the label
Ingredient amounts: compare mg, mcg and grams without mixing them
Normalize mass units carefully, preserve the named ingredient and avoid converting activity measures with a generic formula.
Read the label
Ingredients, serving sizes and the details that make two bottles different.
Start with the Supplement Facts panel, then compare products with the same ingredient, form and serving basis. This collection explains how to build a comparison without treating a larger number or a longer ingredient list as proof of better value. Read the label-reading overview first, then follow the guides for the particular information missing from your shortlist. These are shopping and research methods, not instructions to choose a dose or treat a condition. Bring questions about suitability, medicines and overlapping supplements to a pharmacist or other qualified healthcare professional.
Use a separate row for every product variant and preserve the label image behind each number. The overview connects serving-size arithmetic with more specific guides on units, blends, mineral amounts, oils and powders. A product can remain on your research list while a missing amount prevents a numerical comparison. When that happens, write the precise information gap and decide who can answer it instead of assigning a made-up value.
Guides in this topic
Read the label
Mineral amount vs. compound weight: choose the right number
Avoid mixing the amount of a named mineral with the weight of its source compound when building an ingredient price comparison.
Read the label
Fish oil and algal oil: compare the EPA and DHA amounts you mean
Keep total oil, EPA, DHA and serving size separate so that an omega-3 cost comparison answers a clearly defined question.
Read the label
Powder weight vs. protein weight: choosing a fair price denominator
Compare a tub price per gram of labeled protein without confusing total powder mass, scoop size and the nutrient amount.
Read the label
Comparing proprietary blends when individual amounts are missing
Learn what you can calculate from a blend label, which ingredient comparisons remain unresolved and what to ask before buying.
Read the label
How to read a supplement label before comparing prices
Build a useful supplement comparison by recording serving size, ingredient amounts, other ingredients and the exact package identity.
Read the label
Serving size vs. bottle count: why 120 capsules may mean 60 servings
Distinguish capsule count, labeled servings and days of supply so that package-size comparisons use the same denominator.