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Excess sun exposure can have harmful effects to the skin,
太阳同时释放出长波紫外线和中波紫外线. The shorter UVB rays do not penetrate very deeply. As a result, they burn the top layer of your skin. Longer UVA rays penetrate into deeper layers of your skin. (There also are UVC rays—shortest wavelength, but are completely blocked by Earth’s atmosphere)
Both types of UV radiation cause molecular changes that damage the DNA within your skin’s cells and ultimately affect your appearance. UV radiation “energizes” electrons, causing them to break free of their atomic “home,” resulting in 自由基
Free radicals look for vulnerable compounds to attach to so that they can become atomically stable again
The vulnerable compounds are often the compounds that comprise your dermal matrix—collagen and elastin. 当自由基附着在这些纤维上时, 他们恶化, resulting in a loss of tone and resilience in your skin
结果:光老化;
All of these changes add up to premature skin aging. And, it’s cumulative—the more time you spend in the sun, the earlier your skin begins to age.
Your skin does have some self-repair capability, but as you age, that ability declines. And hidden damage below the surface can show up later in life. 更糟糕的是, 虽然, is that repeated damage can alter skin cell’s DNA, leading to the development of skin cancer.
Spending time outdoors enlivens your body and soul. 就你的健康而言, sun exposure also helps your body produce vitamin D, which is integral to your body’s absorption of calcium. 过多的阳光照射是有害的, 然而, which is why wearing sunscreen is a must when spending any time outside. Here are a few of the many reasons why sunscreen should be a part of your skincare arsenal all year long.
The best reason to wear sunscreen on a daily basis is the impact it has on skin cancer rates. Applying a broad-spectrum sunscreen with an SPF 15 or higher every day can reduce your melanoma risk by 50%, while also reducing the risk of squamous cell carcinoma by 40%. For the best results, reapply sunscreen every two hours or after swimming. You should also wear wide-brimmed hats and sunglasses to provide your head, 脖子, 眼睛有更好的保护.
Ultraviolet light causes 自由基 to form in the skin, which lessens its elasticity. When skin is less elastic, it’s prone to sagging and drooping, which then creates wrinkles. 就像抽烟一样, excessive sun exposure can cause wrinkling to occur much sooner than it would have normally. This is especially true for fair-skinned people, who have less natural sun protection.
Along with wrinkles, UV rays from the sun also cause discoloration. 太阳黑子, 正如他们通常所说的那样, are dark brown hyperpigmented spots that form on your face after years of UV abuse. 一旦形成, you’ll need to undergo laser skin resurfacing or chemical peels to have them removed. While they’re not harmful, they can diminish the look of your skin.
Sunscreen works by keeping UV rays from penetrating your skin. There are two mechanisms by which sunscreens can work:
Block UV radiation – these sunscreens use a mineral barrier to physically block/reflect UV radiation so that it never penetrates your skin at all.
Lock UV radiation – these sunscreens use chemicals that absorb and trap UV radiation to prevent oxidative damage.
当你选择全谱防晒霜时, you get sun protection against the full spectrum of UV radiation—UVA and UVB rays.
太阳黑子, also called age spots or solar lentigines, are caused by sun damage to the skin. 它们看起来像黑色的平点, brown or gray on areas more often exposed to sunlight, 通常:
太阳黑子 appear when the sun’s UVA and UVB rays penetrate the skin and stimulate melanocyte cells, 哪些开始(过度)产生黑色素, 皮肤的天然色素. The result is spots of irregular color, or sunspots.
Unlike indicators of malignant skin damage, sun spots are flat and evenly round—either circular or ovate. If you see areas of hyperpigmentation that have raised edged, have variated color and/or have no defined shape, those spots should be examined by a doctor.
太阳黑子 develop over long periods of repeated sun exposure. 最好的防护是防晒. 然而, 如果你已经看到太阳黑子, there are treatments you can use that don’t require you to see a doctor or aesthetician.
One of the best ways to treat summer sunspots is by using sunscreens, to prevent the effects of UV radiation on the skin. 另一个好方法是穿越 去死皮 , which helps the skin renew itself and slough away the (hyper)pigmented area. Other ways to help treat sunspots include application of skin 洁剂. 自然的皮肤 洁剂 包括:
Hale Cosmeceuticals offers several products to help treat sunspots. We have moisturizers with AHA and retinol to help with 去死皮 and cell turnover. 我们的皮肤亮白动力, 虽然, SB-7是亮肤剂吗, which combines seven powerful lightening agents that are both safe and nourishing.
