Five Common Sunscreen Misconceptions Dermatologists Want You to Forget

In recognition of Skin Cancer Awareness Month, the dermatology experts at Dermatology Associates are encouraging those throughout the Portland Metro area community to reconsider common sunscreen misconceptions that may be putting their skin at risk. Although sunscreen is a critical tool for protecting against harmful UV radiation, lingering myths continue to limit its effective use.

Here are five sunscreen myths it’s time to leave behind:

Myth #1: A higher SPF means you don’t need to reapply
The truth: No sunscreen provides all-day protection. Even high SPF formulas wear off over time. It is prudent to reapply sunscreen every two hours when out in the sun and again after getting out of the water or sweating.

Myth #2: Makeup with SPF is enough protection
The truth: While makeup containing SPF can offer an added layer of defense, most people don’t apply enough to achieve adequate protection. A broad-spectrum sunscreen (protects against both UVA and UVB rays) with an SPF of 30 or higher should always be applied underneath. Also, don’t neglect your neck, your ears, and your chest.

Myth #3: You can’t get sunburned through a window
The truth: While glass blocks UVB rays, it does not fully block UVA rays, which penetrate deeper into the skin and contribute to aging and skin cancer risk. Daily sunscreen use is important, even indoors and while driving.

Myth #4: Sunscreen blocks vitamin D production
The truth: In practice, sunscreen use does not completely prevent vitamin D absorption. Plus, vitamin D can be safely obtained through diet – such as fatty fish, fortified dairy products, and cereals – or through supplements when needed. The Skin Cancer Foundation stresses that exposing unprotected skin to sunlight to maintain vitamin D levels is not recommended, as it increases the risk of skin cancer and premature skin aging.

Myth #5: Sunscreen causes more harm than good
The truth: Misinformation about sunscreen ingredients has led to unnecessary concern. Sunscreens available in the U.S. are regulated for safety and play a vital role in preventing Skin Cancer. The risks of unprotected sun exposure (see “Why Tanning is Bad for You”) far outweigh any potential concerns.


It’s important to know how sunscreen works. Sunscreens protect the skin from harmful ultraviolet (UV) radiation in two primary ways. Mineral (physical) sunscreens, typically made with ingredients such as zinc oxide or titanium dioxide, sit on the skin’s surface and reflect or scatter UV rays. Chemical sunscreens, on the other hand, absorb UV radiation and convert it into heat, which is then released from the skin. Both types are effective when used correctly and labeled “broad-spectrum,” meaning they protect against both UVA (aging) and UVB (burning) rays.

Skin cancer remains the most common cancer in the United States, yet it is also one of the most preventable. Incorporating a broad-spectrum sunscreen with SPF 30 or higher into your daily routine, along with protective clothing and annual skin exams, can significantly reduce your risk.

This Skin Cancer Awareness Month, Dermatology Associates encourages everyone to separate fact from fiction and make sun protection a daily priority.

Schedule an appointment with one of our dermatology providers at Dermatology Associates or call 503.245.2415.

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About Dermatology Associates
Founded in 1986, Dermatology Associates is a leading dermatology practice serving patients throughout the Portland Metro area with comprehensive medical, surgical, and cosmetic dermatology services. They specialize in the diagnosis and treatment of skin conditions, including acne, eczema, psoriasis, and skin cancer, and offer advanced procedures, including Mohs micrographic surgery, a highly effective treatment for many types of skin cancer. In addition to medical dermatology and skin cancer care, Dermatology Associates provides a range of cosmetic dermatology treatments, including injectable treatments such as BOTOX® Cosmetic and Juvéderm®. With a team of experienced dermatology providers and a commitment to patient-centered care, Dermatology Associates delivers personalized treatment plans to help patients achieve and maintain healthy skin. For more information, visit da-pdx.com