Theralogix Thera-D 4000 Vitamin D3 delivers 4,000 IU (100 mcg) per tablet to support immune health, bone and heart wellness. NSF certified, gluten-free, vegan, and USA-manufactured with premium ingredients for a 90-day supply (90 tablets).

Biologically active vitamin D3 mirrors the vitamin D your body creates from sunlight without UV exposure risks, making Thera-D a trusted daily source for both men and women.