Sunscreen works by creating a coating that absorbs ultraviolet B (UVB) radiation from the sun before it penetrates the skin. This radiation can irreversibly damage the DNA of skin cells and promote the formation of mutations that can develop into cancer cells.
Sunscreen has another effect by blocking UVB rays: When used correctly, it can limit the body’s ability to produce vitamin D. This vitamin is important for maintaining immunity and bone health. Its main natural source is the sun.
In general, people with fair skin only need 10 to 15 minutes of sun exposure a few times a week to get all the vitamin D they need. People with darker skin may need up to 30 minutes more sun.
Diya Mutasim, MD, a professor in the department of dermatology at the University of Cincinnati College of Medicine, says that low exposure to sunlight has some benefits for both vitamin D synthesis and a person’s mood.
In general, you do not need to wear sunscreen if you will be exposed to sunlight for short periods of time, such as a few minutes while walking to your car.
Many factors affect how quickly you get sun damage. A light-skinned person may not survive more than five minutes without any protection, while a dark-skinned person may not survive more than 40 minutes.
News materials cannot be equated with a doctor’s prescription. Consult an expert before making a decision.
Source: Ferra
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