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Vitamin D concentration in fat is 12X that in blood – March 2008

Vitamin D3 in fat tissue

Endocrine. 2008 Feb; 33(1): 90–94. doi: 10.1007/s12020-008-9051-4
Miriam Blum, Gregory Dolnikowski, Elias Seyoum, Susan S. Harris, Sarah L. Booth, James Peterson, Edward Saltzman, and Bess Dawson-Hughes corresponding author


Overview Obesity and Vitamin D contains the following summary


  • Normal weight     Obese     (50 ng = 125 nanomole)

Obesity is associated with low Vitamin D (and treated by D as well) – Aug 2019 has the following
Fast weight loss by Obese: Summary of the data as of Sept 2019
1) 50,000 IU Vitamin D weekly for at least 6 months
   If gut problems, should use a gut-friendly form of vitamin D
2) Add calorie restriction diet and light exercise after ~2 months*
   * Vitamin D levels must be above 30ng/ml to help with weight loss
   * Start losing weight 2 months sooner if take a 50,000 IU daily for a week
3) More weight loss if also add Magnesium or cofactors
   30% Improved Vitamin D response with Magnesium - a Vitamin D Cofactor
   Note: Magnesium reduces weight loss by itself as well
   20% improved vitamin D response if also add Omega-3 a Vitamin D Cofactor
  Note: Omega-3 reduces weight loss by itself as well
4) More weight loss if also improve activation of Vitamin D Receptor
   Vitamin D Receptor activator: 0-30% improved Vitamin D response
   Obesity 1.5 X more likely if poor Vitamin D Receptor – meta-analysis Nov 2019
Update Dec 2019 - Dr. Greger plant-based eating (not diet) for both weight loss and health.
  His book does not mention Vitamin D nor Adenovirus

Google Scholar reported 84 references to this study as of June 2020

 Download the PDF from VitaminDWiki

The literature describing vitamin D content of fat tissue is extremely limited. We conducted a pilot study that measured the concentrations of vitamin D3 in the fat tissue and serum of obese adults. These measurements were performed using a new liquid chromatography mass spectrometry (LC/MS) method. The objectives of this study were: to measure and report the vitamin D3 concentration in serum and subcutaneous fat samples from obese individuals and to examine the association of vitamin D3 in fat with vitamin D3 in serum. This cross-sectional study was conducted in 17 obese men and women who were scheduled to undergo gastric bypass surgery. The mean vitamin D3 concentration in subjects’ subcutaneous fat tissue samples was 102.8 ± 42.0 nmol/kg. The mean vitamin D3 concentration in serum was 7.78 ± 3.99 nmol/l. Vitamin D3 concentrations of fat tissue and serum were positively correlated (r = 0.68, P = 0.003). Consistent with previous findings in obese subjects, subjects in this study had suboptimal vitamin D status as demonstrated by a mean 25-hydroxyvitamin D concentration of 43.3 ± 15.4 nmol/l. In conclusion, fat tissue vitamin D3 can be measured by LC/MS and is detectable in obese subjects with suboptimal vitamin D status. Compatible with the long-standing concept that fat tissue is a storage site for vitamin D, fat tissue and serum vitamin D3 concentrations were positively correlated.

Attached files

ID Name Comment Uploaded Size Downloads
13882 10X in fat vs blood.jpg admin 04 Jun, 2020 12:04 29.81 Kb 197
13881 Vitamin D3 in fat tissue 2008.pdf admin 04 Jun, 2020 12:04 126.23 Kb 281
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