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ZRT home testing kit for vitamin D
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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.

Getting the right amount of vitamin D

Getting the right amount of vitamin D


How do you get the right amount of vitamin D? Learn from what sources you can get vitamin D and how much you can get. Continue reading

Vitamin D and asthma: a patient friendly summary

Vitamin D and asthma: a patient friendly summary


What is the link between vitamin D and asthma? Can vitamin D help asthma? Read our patient friendly summary and find out. Continue reading

Testing for vitamin D deficiency

Testing for vitamin D deficiency


Worried if you are getting enough vitamin D? Learn about vitamin D testing to see if you are getting enough. Continue reading

We need your help!

We need your help!


The Vitamin D Council is a nonprofit and relies on donations from people like you. Learn more about how to donate to the Council and our membership program. Continue reading