Vitamin D

Discussion in 'Nutrients' started by Matthew Capowski, May 3, 2015.

  1. Matthew Capowski

    Matthew Capowski Administrator Staff Member

    This thread is for the discussion of Vitamin D.

    Peter Bergman, Anna-Carin Norlin, Susanne Hansen, Rokeya Sultana Rekha, Birgitta Agerberth, Linda Björkhem-Bergman, Lena Ekström, Jonatan D Lindh, Jan Andersson. Vitamin D3 supplementation in patients with frequent respiratory tract infections: a randomised and double-blind intervention study. BMJ Open, 2012; 2: 6 e001663 DOI: 10.1136/bmjopen-2012-001663

    Paul Bergner's summary of the above article from his twitter: "Vitamin D 4000 iu/day for 1 year reduced colds by 25% and antibiotic use by 50%".

    The Vitamin D Council in particular is a good resource and they offer a home testing kit.

    The Weston Price Foundation has some valuable reads (although do keep in mind that their paradigm of high Vitamin A with Vitamin D differs from the Vitamin D council and it's not clear which proposal is more accurate):
  2. Matthew Capowski

    Matthew Capowski Administrator Staff Member

    Science Daily has an interesting article titled Low and high vitamin D levels in older women associated with increased likelihood of frailty about the following study:

    Kristine Ensrud et al. Circulating 25-hydroxyvitamin D Levels and Frailty Status in Older Women. Journal of Clinical Endocrinology & Metabolism, December 2010

    "...lower and higher vitamin D levels were associated with an increased likelihood of frailty in older women." The lower levels part was expected. The higher levels part is more interesting. Vitamin D researchers have always been aware there is an upper limit to one's vitamin D levels as well as diminishing returns for increased supplementation. But establishing what that ideal range is remains a useful research question.
  3. Matthew Capowski

    Matthew Capowski Administrator Staff Member

    Mayo Clinic. "Vitamin D toxicity rare in people who take supplements, researchers report." ScienceDaily. ScienceDaily, 30 April 2015.

  4. Matthew Capowski

    Matthew Capowski Administrator Staff Member

    Effects of vitamin D supplementation on intestinal permeability, cathelicidin and disease markers in Crohn’s disease: Results from a randomised double-blind placebo-controlled study [PDF file of study]

    The above study finds that 2000IU/day for 3 months helped reduce both inflammation in Chrohn's disease and reduced intestinal permeability.
  5. Matthew Capowski

    Matthew Capowski Administrator Staff Member

    Vitamin D Status and Rates of Cognitive Decline in a Multiethnic Cohort of Older Adults:

    From the conclusion of the study:

    Low VitD status was associated with accelerated decline in cognitive function domains in ethnically diverse older adults, including African American and Hispanic individuals who exhibited a high prevalence of VitD insufficiency or deficiency. It remains to be determined whether VitD supplementation slows cognitive decline.​
  6. Matthew Capowski

    Matthew Capowski Administrator Staff Member

    This podcast discusses the VITAL study referenced below:

    The VITAL Study is an ongoing research study in 25,874 men and women ages 50 and up in the U.S. The goal of the study is to determine whether vitamin D supplementation of 2000 IU daily or omega 3 fatty acids reduces the risk for developing cancer, heart disease and stroke in healthy adults. The study will end in 2018, totaling a five year duration. This study will provide enormous insights regarding the benefits of vitamin D and omega 3 supplementation. In this episode, Dr. John Cannell discusses the VITAL Study and its potential clinical implications with Dr. Joann Manson.​
  7. Matthew Capowski

    Matthew Capowski Administrator Staff Member

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