Vitamin D3
Also known as: cholecalciferol, vitamin D
Effective Dosage
600-2000 IU daily
✓ What the Science Says
Vitamin D3 is essential for calcium absorption and bone health. It also plays a significant role in immune function and has been associated with improved mood and cognitive function in some studies.
✗ What It Doesn't Do
Vitamin D3 is often marketed as a cure-all for various ailments, including chronic diseases and depression, but it should not be seen as a substitute for a balanced diet or medical treatment. Claims that it can significantly boost energy levels or promote weight loss are not supported by strong evidence.
Evidence-Based Benefits
Vitamin D3 is essential for calcium absorption and bone health. It also plays a significant role in immune function and has been associated with improved mood and cognitive function in some studies.
Strong EvidenceEffective at: 600-2000 IU daily
Source: auto-research
Absorption & Bioavailability
Good - Vitamin D3 is well absorbed when taken orally, especially in the presence of dietary fats.
Red Flags to Watch For
- 🚩 Watch for products claiming to contain excessively high doses without scientific backing.
- 🚩 Beware of marketing that suggests Vitamin D3 can replace other essential nutrients or medications.
Products Containing Vitamin D3
See how Vitamin D3 is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-02-21