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Who discusses Vitamin D3?
Public protocol records on Supplement Engine for Vitamin D3, grouped by relationship type. Counts are not a measure of medical effectiveness — only of what we have verified in cited sources.
Verified public claims: 3
Distinct people: 3
Personal-use records: 1 · Discussion/research: 1 · Commercial/affiliation: 1
Protocol-overlap score 22/100 measures how often this supplement appears in our verified public records — not safety or efficacy. Methodology
Personal-use records
Sources that support the person using the supplement themselves.
- Rhonda Patrick
Personal-use record · Current use not established
Source: How Dr. Rhonda Patrick Chooses Her Most Important Supplements — FoundMyFitnessVerifiedDose sourcedLast checked: 2026-09-19 · Claim verified: 2026-09-19
Context
Rhonda states she totals around 4,000 IU vitamin D per day across a dedicated supplement and multivitamin — personal figure, not medical advice.
Recommendations
Sourced recommendations — not the same as personal use.
- Michael Greger
Recommendation record · Not a personal-use claim
Source: Optimum Nutrient Recommendations — NutritionFacts.orgVerifiedDose sourcedLast checked: 2026-09-19 · Claim verified: 2026-09-19
Context
NutritionFacts optimum-nutrient page recommends ~2,000 IU vitamin D when sun exposure is insufficient (latitude/season rules on that page).
Sponsorship / affiliation
Commercial or product-page relationships — not personal-use proof.
- Mark Hyman
Product / affiliation record · Not a personal-use claim
Source: Mark's Personal Stack — Mark Hyman, MDVerifiedLast checked: 2026-09-19 · Claim verified: 2026-09-19
Context
drhyman.com “Mark’s Personal Stack” commercial collection lists Vitamin D Supreme among products branded as Mark’s regimen.