Vitamin D3
Vitamin D3 (cholecalciferol) is more effective than D2 at raising 25(OH)D. It requires dietary fat for absorption and works synergistically with vitamin K2 and magnesium.
Benefits
Available Forms
Cholecalciferol (D3)
high absorptionRaises blood levels more effectively than D2.
Liposomal D3
high absorptionEncapsulated for enhanced uptake.
Common Uses
Best Timing
Best in the morning with a fat-containing meal.
Things to Consider
- ⚠ Take with fat for absorption
- ⚠ Pair with K2 at higher doses
- ⚠ Test 25(OH)D before high-dose use
Related Ingredients
Vitamin K2 (MK-7)
Vitamin K2 activates osteocalcin and matrix Gla-protein, helping direct calcium to bone and away from arteries. It complements vitamin D3 supplementation.
Magnesium Glycinate
Magnesium is a cofactor in 300+ enzymatic reactions. The glycinate form is well-absorbed and less likely to cause loose stools than oxide, making it preferred for sleep and relaxation use cases.
Calcium
Calcium supports bone mineralization, but food sources are preferred. Calcium citrate absorbs well regardless of food; carbonate needs stomach acid. High single doses inhibit iron absorption.
Omega-3 (EPA & DHA)
EPA and DHA from marine sources support cardiovascular and cognitive health. The triglyceride form shows superior absorption over ethyl esters, particularly when taken with dietary fat.