Vitamin D3: Research, Dosing, and Where to Buy in 2026
A research-first profile for Vitamin D3, aggregating mechanism notes, transcript dosing mentions, vendor recommendations, and PubMed-indexed literature without presenting medical guidance.
Vitamin D3 is a research compound profiled here from named-expert transcripts and peer-reviewed literature, without medical guidance. As of July 2026, The Peptide Wiki aggregates 8 PubMed-cited papers, 6 transcript dosing protocols, and 2 referenced vendors for Vitamin D3, each linked to its source.
- 6 aggregated dosing-protocol mentions from source transcripts.
- 8 PubMed-indexed citations listed in the research table below.
- 2 vendor recommendations captured from named experts.
What is Vitamin D3?
Research compound aggregated from creator and literature mentions. No direct disease-treatment claims are made on this page.
Vitamin D3 Dosing Protocols
The entries below are transcript-derived dosing mentions. They are preserved for research context and are not medical advice.
| Speaker | Source | Timestamp | Protocol | Evidence |
|---|---|---|---|---|
| Lucas Aoun | Muscle Builders, Vitamin D, Ashwagandha, GDAs & More with Lucas Aoun | 00:19:56 | Lucas reports testing 25-hydroxy vitamin D at least twice per year and using 5,000 IU daily for 2 months as a baseline supplemental dose (some may need more) | anecdotal |
| Skip | Why Underground HGH Is Suddenly Disappearing in 2026 | 00:22:25 | 4,000-12,000 IU per day depending on sun exposure; Skip takes 10,000 IU/day but skips on days with significant pool sun exposure | anecdotal |
| Ryan Michael Ballow | Hacking TRT with HIGH doses, Energy like a MADMAN, and Protocol MASTERY | 00:23:37 | Speaker reports taking 4,000 IU vitamin D in the morning. | anecdotal |
| Lucy | How to Make Your Child Taller & Smarter | 00:16:50 | Liquid vitamin D given in the morning (giving at night turns toddlers into 'little monsters' that won't sleep); used as-needed when daughter is around sick children or starting to get sick | anecdotal |
| Cortex Labs (Ryan Ballow) | Supercharging LIBIDO, Steele Rod Protocols, and TRT Biohacking LIVE Q&A | 00:24:14 | Host's personal: 4,000 IU/day baseline (reduced from 6,000 IU) | anecdotal |
| Cortex Labs (Ryan Ballow) | DHT Overdrive: Sky-High Levels for Powerful Erections! #shorts | 00:00:11 | Speaker reported: 4,000 IU in the morning | anecdotal |
Where to Buy Vitamin D3 in 2026
Marek Health
Code: ergogenicVisit vendor → View profile →Recommended by Steve at 00:11:54.
Dynamis Online
Visit vendor → View profile →Recommended by Evan Ward at 00:01:01.
Side Effects and Safety
Anecdotal reports and study-level observations vary by route, dose, and individual. This page does not provide medical advice. Consult a qualified clinician before any research use.
User Reviews
User reviews aggregator coming Q3 2026 (Reddit + YouTube comments + Discord research notes). Until then, see the expert quote section above and PubMed citations below.
Research Efficacy Snapshot
Published efficacy percentages cited in PubMed trials and named-expert reports about Vitamin D3. Each line links to the original source.
- "An average of 6-30% (in one case, up to 10 times) increased response to photodynamic therapy was reported in combination with vitamin D and D3 as compared to photodynamic therapy alone." · Mazur A et al, 2022 PubMed
- "Because most people are inflamed (in the US 93% of the population is currently inflamed), the vitamin D cannot be processed properly by the liver." · Lucas on "Muscle Builders, Vitamin D, Ashwagandha, GDAs & More with Lu" @ 15:07
Research and Studies
8 PubMed-indexed papers reference Vitamin D3. Top 8 shown.
Legal Status
Vitamin D3 is presented here as a research compound. FDA approval status, scheduling, WADA status, and state-specific telehealth rules may apply. Always verify current regulatory status. Last verified: 2026-07-09.
Frequently Asked Questions
Is Vitamin D3 FDA-approved?
Vitamin D3 is presented on this page as a research compound. FDA approval status, scheduling, and state-specific rules may apply and change. Verify current regulatory status before any decision.
What dosing is reported for Vitamin D3?
This page aggregates 6 dosing-protocol mention(s) from named-expert transcripts, each linked to a verbatim source timestamp. See the Dosing Protocols table above. Mentions are anecdotal, not medical advice.
Where can I buy Vitamin D3?
2 vendor recommendation(s) are tracked in our directory, sourced from named-expert mentions. See the Where to Buy section above. Always verify COA and current regulatory status.
How much research has been published on Vitamin D3?
8 PubMed-indexed paper(s) reference Vitamin D3 in our current research feed. See the Research and Studies section above for citations.