Bone Health

Vitamin D is crucial for calcium absorption, which helps maintain strong bones and teeth. A deficiency can lead to conditions such as rickets in children and osteomalacia or osteoporosis in adults. Citation: Holick, M. F. (2007). "Vitamin D deficiency." New England Journal of Medicine, 357(3), 266-281.

Immune Function

Adequate levels of vitamin D enhance the pathogen-fighting effects of monocytes and macrophages—white blood cells that are important parts of your immune defense. Citation: Ginde, A. A., et al. (2009). "Vitamin D insufficiency and acute respiratory infection in the elderly." Journal of Clinical Endocrinology & Metabolism, 94(4), 1400-1405.

Mood Regulation and Mental Health

Vitamin D has been linked to mood regulation, and low levels may contribute to depression. Some studies suggest that supplementation can improve mood in individuals with low levels of vitamin D. Citation: McCann, J. C., & Ames, B. N. (2008). "Is there convincing biological or behavioral evidence linking vitamin D deficiency to increased risk of depression?" Journal of Nutritional Biochemistry, 19(5), 366-382.

Support for Cardiovascular Health

Studies suggest that adequate vitamin D levels may be associated with a lower risk of heart disease, possibly by influencing blood pressure regulation and reducing inflammation. Citation: Wang, L., et al. (2012). "Vitamin D and cardiovascular disease: a systematic review." The Journal of Clinical Endocrinology & Metabolism, 97(9), 3481-3488.

Potential Cancer Prevention

Some research indicates that higher levels of vitamin D might reduce the risk of certain cancers, including colorectal and breast cancer, possibly due to its role in cell growth regulation. Citation: Garland, C. F., et al. (2009). "Vitamin D and prevention of cancer." Journal of Clinical Oncology, 27(23), 3844-3855.

Enhanced Muscle Function

Vitamin D plays a role in muscle function and strength. Adequate levels are important for physical performance, particularly in older adults, who may be at risk of falls and fractures.
Citation: Bischoff-Ferrari, H. A., et al. (2009). "Vitamin D and muscle strength in the elderly: a systematic review and meta-analysis." Journal of Bone and Mineral Research, 24(4), 785-795.

Improved Insulin Sensitivity

There is evidence that vitamin D can improve insulin sensitivity and may play a role in the prevention and management of type 2 diabetes. Citation: Tzoulaki, I., et al. (2010). "Vitamin D and the risk of type 2 diabetes: a systematic review and meta-analysis." Diabetes Care, 33(11), 2420-2426.