Van's Health Foods

In Historic Downtown Livermore since 1972

Vitamin D, blood sugar and insulin

Doctors in this study measured blood sugar and insulin levels in 85 obese and non-obese Philadelphia children, ages 4 to 18, and found nearly half were low or deficient in vitamin D. Older African-American children with higher body-mass index scores had the lowest levels of vitamin D. As vitamin D levels rose, blood sugar levels and insulin resistance decreased, reducing chances of developing type 2 diabetes.

Vitamin D3 more effective than D2 for treating deficiency

Vitamin D, a fat-soluble vitamin, has two major forms; D2 (ergocalciferol) and D3 (cholecalciferol). Since vertebrates synthesize vitamin D3 from sunshine, researchers wanted to test for any biological differences between vitamin D2 and D3 once inside the body. In the study, 33 health adults took 50,000 IU of vitamin D2 or D3 per week. After 12 weeks, blood serum levels of the active form of vitamin D (calcitriol) were 70 percent higher in the vitamin D3 group than in the vitamin D2 group. The vitamin D3 group also had two to three times the amount of stored vitamin D. Study authors said that most North American pharmaceutical preparations use vitamin D2, and recommend switching to vitamin D3 for its greater potency and lower cost.

Reference: Journal of Clinical Endocrinology and Metabolism; 2011, Vol. 96, No. 3, E447-52

From the July 2011 newsletter

Van's Health on December - 7 - 2011
categories: Supplements, Vitamins