Is it true that wearing suncream in the winter slows signs of ageing?

Prof Helen MacDonald emphasizes that SPF only blocks UVB radiation, which is important for preventing burning and skin cancer, but not for skin aging concerns that are exacerbated by UVA radiation. She explains that UVA causes the skin damage associated with aging and is present year-round, whereas UVB is mostly absent in the winter months in the UK. Therefore, broad-spectrum sunscreen is essential to protect against UVA, regardless of the season.

MacDonald also highlights that vitamin D synthesis happens primarily between April and September when UVB rays are stronger. In the winter months, primarily UVB rays are significantly less, which reduces the risk of sunburn and limits vitamin D production. As a result, applying sunscreen will not impede vitamin D production during winter months, as the necessary UVB rays are not effectively reaching us.

To maintain adequate vitamin D levels, it’s recommended to minimize sunscreen use during brief outdoor moments in summer but to opt for vitamin D supplements during the winter months for those in the UK, where sunlight is less intense and less effective for UVB absorption.

Read at www.theguardian.com