Vitamin D, Sun, and the Negative Effects of Excessive Sunscreen Use

In recent years, public opinion has increasingly focused on the need for sunscreen to prevent skin damage and skin cancer. While protecting our skin from harmful UV rays is important, excessive sunscreen use can also have unintended consequences for our health. In this article, we will explore the importance of vitamin D for our bodies and the potential issues caused by constant sunscreen use.

Vitamin D and Sunscreen

Our bodies need UV-B radiation to produce provitamin D3, which is essential for activating our immune system, strengthening our bones, and preventing diseases like diabetes, cardiovascular diseases, and autoimmune conditions [1]. Scientific evidence also suggests that vitamin D plays a role in preventing certain cancers, such as breast, colon, ovarian, and prostate cancers [2]. A 2010 study in the Journal of Clinical Endocrinology and Metabolism revealed that approximately 59% of people in industrialized countries suffer from vitamin D deficiency [3].

The Problem with Daily Sunscreen Use

Using sunscreen with UV-B filters all year round, from morning to evening, can interfere with vitamin D synthesis and lead to deficiencies [4]. This can negatively impact overall health and contribute to long-term well-being issues.

How to Maintain Vitamin D Production Despite Sunscreen

Rona MacKie of the British Association of Dermatologists recommends spending 10-15 minutes lightly dressed in the sun regularly before applying sunscreen. This allows the body to produce enough vitamin D [5]. However, during winter, this method may be insufficient, so it’s advisable to have your vitamin D levels checked and supplement if necessary.

Conclusion

It is essential to find a balance between sunscreen use and ensuring adequate vitamin D production. By exposing yourself briefly to the sun before applying sunscreen and monitoring your vitamin D levels, you can support your overall health and prevent deficiencies.

References:

[1] Moukayed, M., & Grant, W. B. (2017). The roles of UVB and vitamin D in reducing risk of cancer incidence and mortality: A review of the epidemiology, clinical trials, and mechanisms. Reviews in Endocrine and Metabolic Disorders, 18(2), 167-182.
[2] Moukayed, M., & Grant, W. B. (2017). The roles of UVB and vitamin D in reducing risk of cancer incidence and mortality: A review of the epidemiology, clinical trials, and mechanisms. Reviews in Endocrine and Metabolic Disorders, 18(2), 167-182.
[3] Forrest, K. Y., & Stuhldreher, W. L. (2011). Prevalence and correlates of vitamin D deficiency in US adults. Nutrition Research, 31(1), 48-54.
[4] Norval, M., & Wulf, H. C. (2009). Does chronic sunscreen use reduce vitamin D production to insufficient levels? British Journal of Dermatology, 161(4), 732-736.
[5] British Association of Dermatologists. (n.d.). Vitamin D and Sunlight Exposure.