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Recommendation #4:
Optimize Your Vitamin D Blood Levels

Vitamin D is a fat-soluble pro hormone that targets 230 to 2800 genes in your body.1 Vitamin D is essential for health and there are two ways to bring blood vitamin D to the optimal levels.2

  1. Sun exposure: It has been suggested by some vitamin D researchers that approximately 10–30 minutes of sun exposure between 10 a.m. and 3 p.m at least twice a week to the face, arms, legs, or back without sunscreen usually lead to the blood-level equivalent of 1,000 IU vitamin D taken orally. The American Academy of Dermatology reaffirmed its position that vitamin D should not be obtained from unprotected exposure to ultraviolet (UV) radiation from the sun or indoor tanning devices.
  2. Supplement: Life Extension recommends you take 5,000 IU to 8,000 IU vitamin D3 daily. And take a 25-hydroxyvitamin D blood test after 3 months to assess and adjust your dosage so your optimal blood levels will be between 50–80 ng/mL year-round.

Once vitamin D3 is produced in the skin or consumed in food, it’s converted in the body to a metabolically active form known as calcitriol that does far more than just regulate your body’s calcium balance.3 Vitamin D affects cell differentiation, immunity, insulin secretion, blood pressure regulation, etc.4-25

Calcitriol is an important neurosteroid hormone responsible for many elements in brain development and behavior as well. Calcitriol increases brain levels of glutathione,8-13 a powerful natural antioxidant that is the body’s most important tool for detoxifying and excreting heavy metals and one that is rapidly consumed during oxidant stress from toxins and other sources.

Life Extension members can maintain optimal levels of blood vitamin D effectively and inexpensively by supplementing daily with a 5,000 IU softgel. A two-month supply retails for just $11, but members can purchase it for only $8.25 (or even less with a multi-bottle purchase). Other dosages and forms of vitamin D are available, please see the Vitamins section.

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