What ChatGPT, Claude, Gemini and Perplexity cite for supplement brands
October 2026: we asked 3 buyer questions 3 times on each engine and collected 36 answers with 264 cited sources. The share is how many answers cited a site at least once; the range shows how much it could move from run to run.
Most cited sites
| # | Site | Kind | Share of answers |
|---|---|---|---|
| 1 | medicalnewstoday.com | Other sites | 47% (32%–63%) |
| 2 | consumerlab.com | Other sites | 36% (23%–52%) |
| 3 | healthline.com | Reviews and best-of lists | 36% (23%–52%) |
| 4 | garagegymreviews.com | Other sites | 33% (20%–50%) |
| 5 | health.yahoo.com | Other sites | 33% (20%–50%) |
| 6 | bscg.org | Other sites | 22% (12%–38%) |
| 7 | fortune.com | Other sites | 22% (12%–38%) |
| 8 | nutrola.app | Other sites | 22% (12%–38%) |
| 9 | verywellfit.com | Other sites | 22% (12%–38%) |
| 10 | shopnaturescraft.com | Other sites | 19% (10%–35%) |
| 11 | store.eunatural.com | Other sites | 19% (10%–35%) |
| 12 | tigerfitness.com | Other sites | 19% (10%–35%) |
| 13 | health.usnews.com | Other sites | 17% (8%–32%) |
| 14 | verifiedsupplementdata.com | Other sites | 17% (8%–32%) |
| 15 | vogue.com | News and magazines | 17% (8%–32%) |
Where the citations come from
- Other sites88%
- Reviews and best-of lists6%
- News and magazines3%
- Brands' own sites2%
- Communities and forums1%
Brands named
Share of answers naming each brand. Brands outside our list are not counted here.
- Nature Made64%
- NOW Foods50%
- Thorne47%
- Pure Encapsulations39%
- Garden of Life36%
- Kirkland Signature33%
- Ritual31%
- Life Extension28%
- Nordic Naturals28%
- Momentous6%
Each engine reads different sites
ChatGPT
9 answers
- consumerlab.com44%
- trust.nsf.org44%
- usp.org44%
- verywellfit.com22%
- bscg.org11%
Claude
9 answers
- store.eunatural.com78%
- garagegymreviews.com67%
- health.yahoo.com67%
- medicalnewstoday.com67%
- verifiedsupplementdata.com67%
Gemini
9 answers
- healthline.com67%
- eunatural.com44%
- medicalnewstoday.com44%
- consumerlab.com33%
- enzbio.com33%
Perplexity
9 answers
- consumerlab.com67%
- garagegymreviews.com67%
- health.usnews.com67%
- health.yahoo.com67%
- medicalnewstoday.com67%
What to do with this
- Be on the sites the engines read: healthline.com. Claim your profile, ask happy customers for reviews, and answer real questions where you can help. Never buy reviews or votes.
- Publish the pages these answers quote: a clear comparison page, pricing, and who you are for.
- Make sure the crawlers behind these engines can reach your site at all.
Questions asked
- What are the best vitamin and supplement brands to buy in 2026?
- What should I buy to find supplements that are third-party tested?
- Recommend vitamin and supplement brands under $50 with good reviews.
Answers come from each engine's official API with web search on, one plain question per call. AI answers vary run to run, so treat small differences as noise. Data: JSON (CC BY 4.0, credit GetPicked). Full method