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Could sunscreen cause vitamin D deficiency? Short answer: Yes



The short answer is yes. But before you throw your SPF 30, dermatologists say that the relationship between sunscreen and vitamin D is much more nuanced.

According to Dr. Henry W. Lim, Emeritus Chair of the Department of Dermatology at the Henry Ford Health System and former President of the American Academy of Dermatology, may apply sunscreens that are applied in a thick layer, "effectively blocking sunlight," and causing a lack of vitamin D synthesis in the skin, "Lim said. A thick layer would be about an ounce or the size of a golf ball for the whole body, he said.

" In the real world … most people spend less than that amount, " In other words, "the sun protection factor used is actually lower than the sun protection factor marked with '."

You may not need to worry about vitamin D deficiency if you do not apply enough sunscreen In one Australian study, sufficient vitamin D levels were maintained over a summer, whether or not people used a broad-spectrum sunscreen or a placebo cream. The researchers attributed the results in part to "the lack of complete skin coverage at all times".

Those who generously apply sunscreen and religiously wear hats and SPF-protected clothing when exposed to sunlight ̵

1; something that Lim recommends to do this Reduce the risk of skin cancer – there is a higher likelihood of vitamin D D-Insufficiency, Lim said

"For the vast majority of the population, there should be no concern about vitamin D levels, but for those who practice strict protection. Wearing sunscreen clothing, hats, staying in the shade in the Free and the application of sunscreen are associated with a higher risk, "Lim said.

Vitamin D deficiency versus skin cancer risk

Vitamin D is synthesized in the skin when there are UVB wavelengths of the sun is exposed.

Thus, if 15 to 20% of the body surface is exposed to sunlight for 15 to 20 minutes two to three times a week, you can reach a sufficient vitamin D level. But even in low sunlight, long-term cumulative sun damage can occur, Lim said.

  Vitamin D: Deficiency, Food Sources and What You Need to Know
"If the skin is DNA damage can occur when exposed to low levels of tanning, which may accumulate DNA damage and potentially increase the risk of skin cancer and photoaging, "said Lim. Squamous cell carcinoma and basal cell carcinoma are the most common skin cancers in humans Limb explained the level of sun exposure while melanoma, the deadliest form of skin cancer, is often the result of more sporadic and intense sun exposure

"Patients need to use sunscreen to minimize their risk of skin cancer, and yes, it does hinders the body's ability to produce vitamin D. I tell the patient, we If we found out that smoking increases vitamin D levels, we would not say we smoke patients, "Dr. Patricia Farris, Dermatologist and Fellow of the American Academy of Dermatology. "In other words, you can not recommend exposing patients to a known carcinogen (UV light) to increase their vitamin D levels."

How to Ingest and Eat Your D

To reduce the risk of skin cancer and skin aging, dermatologists recommend practicing a sensible sunscreen. This means wearing wide-brimmed hats, sunglasses, and sunscreen. Sunscreen clothing marked "UPF" is tightly woven and "the amount of UV radiation that would penetrate is quite low," said Lim.

A broad-spectrum sunscreen with an SPF of 30 or higher, which protects against harmful UVA and UVB rays should be liberally applied to all exposed areas of the body when left out for long periods of time to minimize the risk of sunburn and skin cancer, explained Lim. (The sun protection factor of a sunscreen is a relative measure For example, using a sunscreen with sun protection factor 30 would require 30 times the UV dose to cause redness compared to the skin without sunscreen.)

Although people with darker skin appear If they have lower risk of skin cancer from sunlight, they should follow these guidelines after liming. The American Aca According to Lim, demy of Dermatology is developing guidelines for sunscreen for people with different skin types.

In order to get enough vitamin D, Lim recommends taking a daily multivitamin, which usually contains a lot of vitamin D, which provides adequate levels of vitamin in the blood. Optimizing vitamin D levels is important for bone health and can help minimize bone thinning and bone fracture risk. The National Institute of Medicine recommended daily dose of vitamin D based on a person exposed to minimal or no exposure to the sun is:
  • 400 International Units for infants / children 0 to 1 years
  • 600 Ie for children and adolescents and adults 1 to 70 years
  • 800 IU for adults over 71 years

"To achieve adequate levels of vitamin D, you should best every day Taking multivitamin rather than relying on sun exposure The former is simple and inexpensive, while preventing the development of skin cancer and skin aging, "said Lim.

Vitamin D supplements can also be helpful and, according to Farris, are very effective in patients with low vitamin D level.

In addition to vitamin D supplements, the American Academy of Dermatology recommends that you source vitamin D from a healthy diet that contains foods that are naturally high in vitamin D, such as vitamin D supplements. Salmon, tuna, sardines, cod liver oil and egg yolks, or foods and vitamin D enriched beverages such as cereals, yoghurt, milk and orange juice.


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