About Supplement Ledger

Last updated October 2026

Supplement Ledger is an independent buying guide for dietary supplements. We read the labels and official product pages so you do not have to, and we put what they say side by side.

What we do

For each category we pick a short list of ingredients that have published human research. We then check every product against that list and score it on one simple scale. We score only what a product publishes on its label or official page. When an amount is not published, we say so instead of guessing.

What we do not do

• We do not test products in a laboratory.
• We do not claim that any supplement treats, cures or prevents a disease.
• We do not give medical advice. Talk to a doctor or pharmacist before you start a supplement.

How we make money

Some links on our pages are affiliate links. If you buy through one, we may earn a commission at no extra cost to you. This can influence which products we feature, so we explain our scoring on every guide and we list the same criteria for every product. Read the full Advertiser Disclosure.

Labels change

Labels and sales pages change over time. Always check the current label before you buy.