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About Dr William Grant

Dr. William Grant is an epidemiologist and founder of the nonprofit organization Sunlight, Nutrition and Health Research Center (SUNARC). He has written over 140 peer-reviewed articles and editorials on vitamin D and health. Dr. Grant is the Science Director of the Vitamin D Council and also serves on their Board. He holds a Ph.D. in Physics from UC Berkeley.

Author Archives: Dr William Grant

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20Dec
Sun exposure: Balanced approach between health risks and benefits of UV and vitamin D

In 2005, the International Commission on Non-ionizing Radiation Protection held an international workshop on UV exposure guidance.

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18Dec
Risk of skin cancer vs importance of vitamin D

Two papers made recommendations on how to reduce skin cancer incidence rates. While reducing skin cancer incidence is a worthwhile health measure, overall health should not be compromised.

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25Oct
Vitamin D — Minimum, maximum, optimum: Conference overview

Dr Grant discusses the vitamin D conference, “Vitamin D — Minimum, maximum, optimum” held in Warsaw, Poland to develop guidelines for vitamin D for Central and Eastern Europe.

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03Sep
A closer look: Cytokines, vitamin D, and autism

Dr Grant investigates how autism, vitamin D and cytokines – proteins released by cells in the body that carry signals to other cells – are interconnected.

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11Aug
A closer look at sunbeds and melanoma

Dr Grant shares his comment submitted in response to a paper published by Dr Boniol and colleagues which estimates melanoma cases per year due to sunbed use in Europe.

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25Jul
Vitamin D may reduce the risk of dominantly inherited Alzheimer’s disease

Dr Grant reviews research published in the New England Journal of Medicine which looks at dominantly inherited Alzheimer’s disease.

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06Jul
Vitamin D reduces risk of hospital-acquired infections

Dr William Grant discusses a paper recently published in Dermato-Endocrinology which provides evidence that vitamin D may reduce the risk of hospital-acquired infections.

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01Jun
Dr. Grant’s take on the recent mortality study

Dr. William Grant offers his take on why the recent mortality study report may not be too reliable.

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02May
Is UV radiation exposure correlated with cancer?

Dr William Grant reviews a study published by Stephen W. Lin and colleagues which found solar UVB doses in July inversely correlated with incidence of 12 types of cancer.

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01May
Does it matter how often researchers test serum vitamin D?

Dr William Grant reviews research in which increased follow-up times for testing serum vitamin D cause results to show little to no effect.

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Research proposes mechanism behind the role of vitamin D in polycystic ovarian syndrome

A new study discovered a mechanism underlying the benefits of vitamin D supplementation for PCOS.

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