What are the most trusted vitamins and supplements?
Vitamins & SupplementsNamed in 1 of 6 answers
#12
15.4
Rank by surface
ChatGPT#2
ChatGPT#2Brand profile
NSF Contents Certified
A certification from NSF International, an American product testing and certification organization founded in 1944, verifying product contents match label claims and are free from contaminants.
2 questions · 1 categories · As of Nov 12, 2026
- Best category rank
- #37
- Vitamins & Supplements · of 190
- Questions
- 2
- 1 categories
- Answers naming it
- 2/12
- Of the answers measured on this brand's questions
Visibility by category
| Categories | Category rank | Questions | Score |
|---|---|---|---|
| Vitamins & Supplements | #37of 190 | 2 | 28.9 |
Ranking by question
Which supplement brands are best for older adults?
Vitamins & SupplementsNamed in 1 of 6 answers
#14
13.5
Rank by surfaceChatGPT#3
ChatGPT#3Named alongside in Vitamins & Supplements
Brands named in the same answers as NSF Contents Certified in the last four weeks, counted in answers.
Sources cited when this brand is named
Sites the answers naming this brand cited in the last four weeks. Counts are citing answers.
| Rank | Source | Citing answers |
|---|---|---|
| 1 | fda.gov | 3 |
| 2 | ods.od.nih.gov | 3 |
| 3 | dev.usp.org | 1 |
| 4 | naturemade.com | 1 |
| 5 | nia.nih.gov | 1 |
| 6 | trust.nsf.org | 1 |
| 7 | usp.org | 1 |
Named by surface, by question
For the brand's best questions: of each surface's 1 answers, how many named it.
| Questions |  Google AI Overviews | ChatGPT |  Claude |  Gemini | Google AI Mode |  Microsoft Copilot |
|---|---|---|---|---|---|---|
| 1What are the most trusted vitamins and supplements? | 0 | 1 | 0 | 0 | 0 | 0 |
| 2Which supplement brands are best for older adults? | 0 | 1 | 0 | 0 | 0 | 0 |