UV-Exposed Mushrooms · Ergosterol · Ergocalciferol
2,000 IU · vegan · gluten-free · 60 caps
Affiliate link · we earn from qualifying purchases. No paid placements.
Mushroom vitamin D2 is produced when mushrooms are exposed to UV-B radiation, converting ergosterol (the fungal sterol) into previtamin D2, which then isomerizes to vitamin D2 (ergocalciferol). This provides a non-animal source of vitamin D suitable for vegans.
Vitamin D2 from mushrooms is bioavailable and raises serum 25(OH)D concentrations similarly to synthetic D2 supplements when consumed at equivalent doses (2,000 IU/day). However, D2 is generally considered less potent than D3 for maintaining long-term 25(OH)D levels and may have a shorter half-life. UV-exposed mushrooms can also produce small amounts of D3 and D4.
Vegans and vegetarians seeking a plant-based vitamin D source, or anyone preferring food-derived vitamin D over synthetic supplements.
No specific contraindications beyond standard vitamin D cautions (hypercalcemia risk at very high doses, granulomatous diseases). D2 is safe at typical supplemental doses.
Pick a depth — minimum to maximal coverage
No full stack configured.
Click individual supplement pills above to buy each on Amazon India.
✓ Take with breakfast or dinner containing fat
✓ Take with breakfast or dinner containing fat
✓ Fat is essential for absorption of fat-soluble vitamin D2
Vitamin D2 from mushrooms is bioavailable and raises serum 25(OH)D concentrations similarly to synthetic D2 supplements when consumed at equivalent doses (2,000 IU/day).
Each bar = one cited trial. Effect varies by methodology, dose, and population.
Deficient adults cohort (n≈90)
Target 25-OH-D 40–80 ng/mL for optimal immune function.
Human bioavailability study
→ 2,000 IU of vitamin D2 from mushrooms was as effective as 2,000 IU of D2 or D3 supplements in raising and maintaining blood 25(OH)D levels over 3 months in healthy adults
In vitro + growth study
→ UV-B exposure during growth phase increased vitamin D2 from 0.2 to 164 µg/100 g fresh weight linearly up to 1,000 mJ/cm². Post-harvest UV exposure achieved 32 µg/100 g
In vitro
→ UV-C irradiation in ethanol suspension increased vitamin D2 by 6,152% in A. bisporus and 4,845% in C. militaris. Ergosterol conversion efficiency depended on mushroom form and UV wavelength
B · Bioavailability of mushroom-derived D2 is well-established and equivalent to synthetic D2; however, D2 is generally less effective than D3 for long-term 25(OH)D maintenance
A plain-English read of the literature behind this supplement. Not a clinical recommendation.
Key citations: See richResearch section. Clinical evidence for joint and bone support from multiple RCTs.
How to use Mushroom Vitamin D2 specifically for Vitamin D deficiency — the right dose, timing, blood markers to track, and how to know if it is working.
A clinical evidence review of Mushroom Vitamin D2 — RCT data, effect sizes, evidence grade, and what the numbers mean for your specific situation.
Everything you need to know about Mushroom Vitamin D2 — mechanism, dose, safety, buying guide for India, and what the research actually says.
SacredBod's longer take on Mushroom Vitamin D2 — context the structured blocks above don't capture.
Mushroom vitamin D2 is produced when mushrooms are exposed to UV-B radiation, converting ergosterol (the fungal sterol) into previtamin D2, which then isomerizes to vitamin D2 (ergocalciferol). This provides a non-animal source of vitamin D suitable for vegans.
Vitamin D2 from mushrooms is bioavailable and raises serum 25(OH)D concentrations similarly to synthetic D2 supplements when consumed at equivalent doses (2,000 IU/day). However, D2 is generally considered less potent than D3 for maintaining long-term 25(OH)D levels and may have a shorter half-life. UV-exposed mushrooms can also produce small amounts of D3 and D4.
Who benefits most
Vegans and vegetarians seeking a plant-based vitamin D source, or anyone preferring food-derived vitamin D over synthetic supplements.
Dosage and form
2,000 IU is the typical effective range. Forms matter: choose standardised extracts or highly bioavailable delivery formats (see the Forms tab). Take as directed.
Side effects and cautions
Generally well-tolerated. Hypercalcemia possible only at extreme doses. Avoid if you: No specific contraindications beyond standard vitamin D cautions (hypercalcemia risk at very high doses, granulomatous diseases). D2 is safe at typical supplemental doses..
The evidence
Human clinical trials and mechanistic research support the use of Mushroom Vitamin D2 for its primary indication. See the Research tab for full citations and study summaries.
Peptides are physician-only. Tell us a bit and we'll route you to the right specialist.
