Can vitamin D synthesis be prevented by sun protection?

Vitamin D helps strengthen bones and teeth, can regulate mood and fight depression, and even help with weight loss. You should aim for about 15 minutes of sun exposure several times a week to effectively reap the benefits of vitamin D.

But what do you do when you put on sunscreen? Can sunscreen block vitamin D?

To answer this question succinctly: No, sunscreen does not block vitamin D. The benefits of sunscreen far outweigh the belief that sunscreen blocks vitamin D. Studies have shown that people who use sunscreen regularly maintain healthy vitamin D levels. and at the same time receives adequate protection from the sun. .

Not using sunscreen can cause irreversible skin damage, such as early signs of aging and skin cancer. So even if it’s tempting to skip sunscreen to get more vitamin D, you still need to put it on before you leave the house.


No, it isn’t. Technically, sunscreen blocks UVB rays, but there is no evidence that sunscreen prevents the body from making enough vitamin D. When you don’t use sunscreen, you risk UVB damage, which can lead to sunburn and other serious dangers. Although UVB wavelengths have been found to stimulate vitamin D production, there is still no reliable evidence that wearing sunscreen causes vitamin D deficiency.

This means you can wear sunscreen every day and still get enough vitamin D for strong bones and a strong immune system. Several observational studies have shown that in real life, sunscreen does not cause vitamin D deficiency and should be worn regularly.

The amount of sunscreen you use can also affect your body’s absorption of vitamin D. Different levels of sunscreen SPF provide different degrees of sun protection. For example, a sunscreen with an SPF of 15 will filter out 93% of UVB rays, compared to 97% of a sunscreen with an SPF of 30.

However, your body doesn’t need that much sunlight to synthesize vitamin D. In fact, 10 to 15 minutes of sun exposure a few times a week is more than enough for your body to produce enough vitamin D to stay healthy.

Factors that affect your vitamin D levels.

Several factors besides sun protection can affect a person’s vitamin D levels. For example, where you live can affect your vitamin D levels. If you live where it’s generally cold and further from the equator, you’re less likely to get the vitamin you need. D and you may need to take supplements.

Carbon particles in the air from burning fossil fuels and wood can reduce vitamin D production. Skin color also plays a role. Light-skinned people generally need less UVB rays to make vitamin D than dark-skinned people because they have less melanin in their skin.

Weight and age also affect vitamin D levels. Some studies have shown that being overweight makes it harder to make vitamin D.

Maintain healthy vitamin D levels.

Maintaining healthy levels of vitamin D is important for your bones and overall health. You can get vitamin D from certain foods, such as fatty fish, egg yolks, milk, cod liver oil, and orange juice.

Vitamin D supplements are a great way to ensure healthy vitamin D levels. Be sure to discuss supplement use with your doctor before starting to determine the right dosage for you.

* Presse Santé aims to communicate health information in a language accessible to all. IN NO EVENT SHOULD THE INFORMATION PROVIDED BE A SUBSTITUTE FOR THE ADVICE OF A HEALTH CARE PROFESSIONAL.

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