The sun emits ultraviolet (UV ) radiation, composed of UVA and UVB rays, which penetrate the skin at different depths. UVA rays, penetrate deeply into the skin and contribute to premature aging by damaging collagen and elastin fibres. This damage results in wrinkles, sagging skin, and age spots. UVB rays, on the other hand, cause superficial damage like sunburn and are strongly associated with skin cancer.
Repeated and unprotected exposure to UV rays causes damage over time, even if it is not immediately noticeable. By using SPF daily, you protect your skin from short-term and long-term damage. SPF blocks UV rays from penetrating the skin, helping to retain a smooth and even complexion.
In a 2013 study published in the Annals of Internal Medicine, participants who used SPF daily showed 24% less skin aging than those who used it sporadically or not at all. Another long-term study confirmed that individuals who wear sunscreen regularly at a young age experience fewer signs of aging later in life.
Collagen, the protein that gives skin its structure, plumpness and smooth appearance, is especially vulnerable to UV damage. UV radiation breaks down collagen in the dermis layer of the skin, leading to a loss of firmness and the appearance of fine lines and wrinkles. Wearing SPF protects the collagen fibres, helping to preserve elasticity and youthfulness.
Sun-induced hyperpigmentation, such as age spots and melasma, occurs when UV exposure triggers an overproduction of melanin in the skin. Regular use of SPF prevents the darkening of existing pigmentation and helps to avoid new spots from forming. Dermatologists often recommend SPF as a vital part of treating and preventing pigmentation disorders, as well as in skin-brightening regimens.
It's crucial to note that SPF isn't just for sunny days or beach outings. UVA rays can penetrate clouds and glass, meaning skin is still vulnerable even on overcast days or while indoors near windows.
SPF is one of the most effective and simplest measures for preventing premature aging. Regular use of SPF should be a cornerstone in any anti-aging skincare routine.
