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The Myths About UV Rays

Ultraviolet (UV) rays are part of the electromagnetic spectrum radiating from the sun and emitted by tanning lamps, according to the Skin Cancer Foundation. There are three types of UV rays: UVA, UVB and UVC. Only UVA and UVB rays penetrate Earth's atmosphere, and overexposure to these leads to skin concerns such as increased skin cancer risk and premature aging. Understanding some common myths about UV rays help a person better protect herself against the dangers of UV radiation.

  1. Myth: Only UVB Rays Cause Skin Cancer

    • While UVB rays, which damage the surface layers of the skin, are the primary cause of skin redness and sunburn, UVA rays are also a concern. UVA rays are emitted by tanning lamps and make up approximately 95 percent of the solar UV radiation that reaches the earth. UVA rays are capable of penetrating deep layers of skin, which exacerbates skin cancer development. UVA radiation is also more prevalent than UVB, penetrating clouds and glass.

    Myth: UV Protection Is Unnecessary on Cloudy Days and in Winter

    • UV radiation reaches the earth year-round, even on cloudy days or during cold weather. Choose a sunscreen that offers both UVA and UVB protection and a sun protection factor (SPF) of at least 15 to wear daily. Take other precautions against overexposure, such as wearing protective clothing and eye wear and checking the side effects of medications for increased risk of sun sensitivity.

    Myth: Choose the Highest SPF Possible

    • SPF is used to measure the efficacy of sunscreen by indicating how long it takes for the skin to redden when a sunscreen is used. If a sunscreen with SPF 15 is used, it takes 15 minutes longer for the skin to redden than if no protection were used. SPF, however, is not the only factor to consider when choosing a sunscreen. Broad spectrum products, which contain ingredients that protect against both UVA and UVB rays, offer the most complete protection.

    Myth: Sun Protection Is Enough

    • Wearing sunscreen and taking other precautions to protect the skin from UV damage is important, but there are other precautions to take as well. The Skin Cancer Foundation recommends carefully examining the skin from head to toe each month. Check for new growths and changes in existing moles, freckles or birthmarks. Use a mirror for areas that are difficult to see. Also, schedule a yearly appointment with a dermatologist for a professional skin check.

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