Category AI Visibility Report
Vitamin D Supplements AI Visibility Report 2026: Top Brands & Buyer Topics in AI Search
Data updated 2026-08-27 · 30-day window · ChatGPT · Google AI Mode · Google AI Overviews
≈13,055
Est. AI queries / month
26
Buyer topics monitored
10
Brands on the AI shelf
Key insights
- Over the last 30 days, GEOly monitored 26 buyer topics in Vitamin D Supplements across ChatGPT, Google AI Mode, Google AI Overviews — an estimated 13,055 AI queries per month.
- Nature Made leads the AI shelf with 15.3% of brand mentions, followed by Thorne (13.6%) and NOW Foods (11.6%). The top three hold 40.5% combined — a concentrated shelf where challengers need a differentiated topic wedge.
- The highest-demand topic is “vitamin d supplements with b12” (top keyword “vitamin d and b12 supplements”, ~1,900 searches/mo).
- AI answers lean on nih.gov most (50.3% of citations) — earning presence on these sources is the shortest path to being recommended.
Brands AI recommends most
Share of brand mentions across AI answers in the last 30 days (Share of Model).
| # | Brand | AI mentions | Share |
|---|---|---|---|
| 1 | Nature Made | 585 | 15.3% |
| 2 | Thorne | 519 | 13.6% |
| 3 | NOW Foods | 443 | 11.6% |
| 4 | Carlson | 242 | 6.3% |
| 5 | Sports Research | 228 | 6% |
| 6 | Nordic Naturals | 179 | 4.7% |
| 7 | Pure Encapsulations | 144 | 3.8% |
| 8 | Life Extension | 113 | 3% |
| 9 | Nutricost | 109 | 2.9% |
| 10 | Kirkland | 96 | 2.5% |
What shoppers ask AI
Buyer topics monitored in this category, with estimated monthly AI queries and the top Google keyword behind each topic.
| Topic | Est. AI queries / mo | Top keyword | Search volume / mo |
|---|---|---|---|
| vitamin d supplements with b12 | ≈2,076 | vitamin d and b12 supplements | 1,900 |
| vegan vitamin d supplements | ≈1,986 | vitamin d supplements vegetarian | 1,300 |
| vitamin d supplements for winter | ≈1,967 | vitamin d supplements in winter | 2,400 |
| vitamin d supplements with iron | ≈1,908 | iron and vitamin d supplements | 1,600 |
| vitamin d supplements with zinc | ≈1,904 | vitamin d and zinc supplements | 1,600 |
| vitamin d supplements for skin conditions | ≈1,727 | vitamin d supplements for eczema | 2,400 |
| natural vitamin d supplements | ≈1,487 | nature made vitamin d supplements | 2,900 |
| best vitamin d supplements | — | best vitamin d supplement | 22,200 |
| vitamin d supplements for sleep | — | vitamin d supplements for sleep | 6,600 |
| vitamin d supplements for immune system | — | vitamin d supplements for immune system | 4,400 |
| vitamin d supplements for breastfeeding | — | vitamin d supplements for breastfeeding mothers | 5,400 |
| vitamin d supplements with calcium | — | calcium and vitamin d supplement | 9,900 |
| vitamin d supplements gummies | — | vitamin d gummies | 8,100 |
| vitamin d supplements for men | — | vitamin d supplements for men | 14,800 |
| vitamin d supplements for older adults | — | vitamin d supplements for older adults | 2,900 |
| vitamin d supplements for fatigue | — | vitamin d supplements for fatigue | 8,100 |
Sources AI cites in this category
Root domains AI engines cited most when answering category queries in the last 30 days.
| Domain | Citations | Share |
|---|---|---|
| nih.gov | 1,011 | 50.3% |
| verywellhealth.com | 231 | 11.5% |
| reddit.com | 105 | 5.2% |
| consumerlab.com | 103 | 5.1% |
| verywellfit.com | 72 | 3.6% |
| health.com | 60 | 3% |
| healthline.com | 45 | 2.2% |
| medicalnewstoday.com | 35 | 1.7% |
Related category reports
FAQ
Which brands do AI assistants recommend most for vitamin d supplements?
Over the last 30 days the top brands by AI mention share are: Nature Made (15.3%), Thorne (13.6%), NOW Foods (11.6%), Carlson (6.3%), Sports Research (6%). Data from GEOly's continuous monitoring across ChatGPT, Google AI Mode, Google AI Overviews.
How many people ask AI about vitamin d supplements?
GEOly estimates ~13,055 AI queries per month in this category across 26 buyer topics, led by “vitamin d supplements with b12”.
Which sources do AI engines cite for vitamin d supplements?
The most-cited domains are: nih.gov, verywellhealth.com, reddit.com, consumerlab.com, verywellfit.com. Building brand presence on these sources is the most direct way to win AI recommendations.
Methodology
GEOly continuously runs category buyer prompts across ChatGPT, Google AI Mode, Google AI Overviews and records which brands are mentioned and which sources are cited. Figures aggregate a 30-day window; AI query volumes are modeled estimates from keyword demand and AI-adoption share. Data: GEOly MCP Server, updated 2026-08-27.
See your brand inside this category
GEOly tracks how ChatGPT, Google AI Mode and Google AI Overviews mention, rank and cite your brand against every competitor above — and what to fix to win the AI shelf.