This is pure active vitamin D3. Most other vitamin D products on the market contain hidden preservatives. Prescription vitamin D, which is synthetic vitamin D2, needs to be converted by the body into the active form, vitamin D3. Vitamin D3 is available in 1000 I.U. and 5000 I.U. capsules.
Vitamin D3 – 1000 – 90 Capsules or Vitamin D3 – 5000 – 60 Capsules