Vitamin / bone health

Vitamin D

Prepared by the ezGLP team. Sources last checked September 5, 2026.

Also known as Cholecalciferol, Vitamin D3, Ergocalciferol, Vitamin D2

Routes represented in the knowledgebase: Oral.

Educational overview

Supplement and prescription forms exist; excessive intake can cause hypercalcemia, kidney injury, soft-tissue calcification, and arrhythmias.

Category: Vitamin / bone health
Routes represented: Oral
Storage context: Follow the product label; store in the original container away from excess heat and moisture.

Authoritative overview

Published literature

No validated PubMed or DOI link is currently curated for this entry.

Safety evidence

Serious or important: hypercalcemia, kidney stones or failure, soft-tissue calcification, arrhythmia.

These effects are associated with excessive exposure.

Safety evidence source

Interaction evidence

These are general, pairwise evidence notes. Green identifies the potential-synergy category, while Lv3/Lv2/Lv1 communicates evidence strength; it does not guarantee benefit or cancel a safety warning.

With thiazide diuretics

Safety flag

Combined use can increase hypercalcemia risk, particularly with high-dose vitamin D or impaired kidney function.

Interaction evidence source

With magnesium

Complementary evidenceLv3

A randomized human trial found magnesium plus vitamin D increased serum vitamin D status more than vitamin D alone.

Interaction evidence sourceRelated trial analysisNIH magnesium overview

Summarised from published literature for reference only, with citations to the source. Evidence is graded as reported and is not a recommendation to combine, dose, or use any compound.

For personal tracking and education only. Not medical advice, diagnosis, or treatment, and not a medical device. Peptides may be prescription-only or unapproved where you live — consult a licensed healthcare professional.