Each D3 tablet vitamin contains 5,000 IU. The D3 is naturally occurring. It comes from the lanolin found in sheep’s wool, which helps to maintain healthy bones and teeth.

You know how important vitamin D is to you, so it's important to know that there are two types: D2 and D3. D3 is the type that occurs naturally in the human body. Vitamin D3 scientific name is Cholecalciferol.

There are a lot of different vitamin types out there, but it can be hard to know which type to go with. Some brands use a form of vitamin called Vitamin D2, which isn't nearly as good as the real deal: Vitamin D3.

But some brands come with dosages that are pitifully low. Here's why: The recommended daily allowance (RDA) for vitamin D is just 400 IU. This was the amount of vitamin D3 recommended 50 years ago before modern-day research studies even began.

These studies have shown that the optimal dose to take is 2,000-10,000 IU per day—dozens of times the RDA!

Here's just how long it takes to soak up 15-20 minutes of sunshine in the middle of the day.

Each Tablet of Advanced Bionutritionals’ Vitamin D3 is packed with 5,000 IU. The D3 is naturally occurring. It comes from lanolin, which is found in sheep’s wool.

This USA-made advanced bionutritionals supplement will help to ensure that you are getting all the vitamins that you need to stay healthy.