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Now dye-free!

Maximum D3 is now purer than ever! The blue dye has been removed from the capsules.

325 MCG (13,000 IU) VITAMIN D3

Maximum D3® is a high-quality vitamin D3 supplement that helps support bone health, calcium absorption, and immune system function.

Maximum D3® is expected to maintain adequate blood levels of vitamin D when taken once a week by adults.

Maximum D3® was the first high-dose vitamin D3 supplement marketed in the United States. It was designed by Dr. Grote who strongly believes in the benefits of vitamin D. He was frustrated that high-quality supplements were not available to his patients, so he carefully formulated Maximum D3® to have superior quality and consistency.

3 Main Way to Obtain Vitamin D →


To help prevent vitamin D deficiency, adults need approximately 15-20 minutes in the sun with 40% of the skin exposed at least 3 days per week.


Supplements can be a convenient and afforable method when sun exposure is limited or not an option.


Common foods that contain vitamin D are fish, eggs, mushrooms, and vitamin D-fortified foods.

The sun is the superior source of vitamin D, but sun exposure may be limited by lifestyle, geography, and the season.

Vitamin D deficiency has been shown to be 2.42 times more prevalent in winter than summer.

One capsule of Maximum D3® contains approximately the same amount of vitamin D a light-skinned person would make if exposed to summer sun for a few hours.

Maximum D3 Benefits

Conveniently Once a Week

Made in the U.S.A.

High-Quality Ingredients

Gluten Free



Numerous research studies link optimal vitamin D levels to better health benefits.