D3 Serum by Premier Research Labs is a one-of-a-kind, live-source vitamin D3 that delivers cardiovascular support, immune system support and aids in calcium absorption for healthy bones and teeth.

Our one-of-a-kind, live-source vitamin D3 delivers cardiovascular and immune system support. Vitamin D3 also aids in calcium absorption for healthy bones and teeth. Recent studies propose ideal vitamin D3 intake should be 2000 IU or more daily (a recommendation our serum meets in just one drop).