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Information on the latest vitamin D news and research.

Find out more information on deficiency, supplementation, sun exposure, and how vitamin D relates to your health.

New pilot study provides a more complete picture of vitamin D’s role in asthma in later life

Researchers have recently found that vitamin D supplementation helps improve some aspects of asthma among the elderly.

Just a couple of weeks ago, we covered a study that provided more comprehensive evidence for vitamin D’s role in asthma throughout life by highlighting adult asthmatics.

As mentioned in this blog, research on vitamin D and asthma focuses mainly on children, with limited research conducted in adults and even less research conducted in elderly populations. Comparing the prevalence rates of asthma in children (9.3%) and adults (8%) with that of the elderly (7%) indicates that the condition is similarly prevalent throughout life.

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  About: Jeff Nicklas

Jeff Nicklas was a staff member for the Vitamin D Council from October 2013 to January 2015. He is now pursuing his passion for public health through graduate studies.

2 Responses to New pilot study provides a more complete picture of vitamin D’s role in asthma in later life

  1. One issue I have with this vitamin D study is that higher doses were not part of the study and duration needed to be a minimum of 1 year. A Similar study was done several years ago relating to knee pain with 2000iu vit. D. The results were no measurable difference in pain levels. My wife and I were on 2000iu for a number of years and had chronic knee pain before and during that time. When we started the Grassroots Study, we increased our vitamin d levels to over 5000iu to get our blood levels up to the 50ng/ml range. After about 6 months we both noticed our knee pain had been reduced considerably and after several years the pain is mostly gone. The improvement happened for both of us at the same time and we were improving our blood levels at the same time. Reducing the knee pain was not a goal when we began the increase and were a bit surprised when we noticed the improvement.

  2. Jeff Nicklas says:


    Thank you for the comment, you bring up a good point.

    Indeed, for us to know vitamin D’s true role in a certain health condition, research needs to be conducted in which adequate doses are used (5,000 IU/day) over a long period of time (upwards of a year or longer) in which natural levels of around 46 ng/ml are maintained and compared to a placebo.

    Now that this research has shown that 2,000 IU/day is safe and leads to some improvement in asthma control among the elderly, it supports the need for these trials using higher doses over a longer period of time.