Our Vitamin D-3 provides you with 5,000 IU of cholecalciferol per caplet. Cholecalciferol, otherwise known as D3, is the substance that is formed when sunlight touches human skin.

Our Vitamin D-3 provides you with 5,000 IU of cholecalciferol per caplet. Cholecalciferol, otherwise known as D3, is the substance that is formed when sunlight touches human skin.

For additional formula information, view the Supplement Facts panel.

All Windmill supplements are manufactured in the United States in an FDA-inspected facility whose GMPs (Good Manufacturing Practices) are independently verified by qualified certification organizations.

Free of artificial colors, flavors and preservatives, Windmill is a trusted name that has been providing America with quality supplements for over 40 years.

Gluten Free