About Dose by Study

Dose by Study is a guide to supplements. We look at how much was used in published studies in people, then compare product labels and cost a day with that amount.

How we make these guides

We write these guides with the help of AI tools. Every study we cite is checked against its PubMed record, and our summaries come from study abstracts. Product amounts and prices come from iHerb product pages. The date on each guide tells you when we last updated it.

No doctor or pharmacist has reviewed these guides yet. Please read them as general information, and talk to your own doctor or pharmacist before you start a supplement.

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How we make money

We earn money through affiliate links to iHerb. If you buy through a link, we may earn a commission at no extra cost to you. Read our disclosure