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Alumier Skin Experts / October 28, 2018

Sunscreens – Q & A

Why should I use sunscreen?

It is well known that the sun’s ultraviolet (UV) radiation causes skin cancer and premature skin aging. A 2011 study from Australia reported that daily sunscreen use reduces melanoma risk by 50% and reduces the risk of squamous cell carcinoma by 39%. Therefore, the importance of sun protection is indisputable.

Green AC, Williams GM, Logan V, Strutton GM. Reduced Melanoma After Regular Sunscreen Use: Randomized Trial Follow-Up. Journal of Clinical Oncology. January 20, 2011 2011;29(3):257-263.

How does sunscreen work?

Sunscreens contain chemical or physical UV filters. Chemical filters like avobenzone and octinoxate absorb and deactivate UV rays changing the light energy to heat. Physical filters like zinc oxide and titanium dioxide sit on the skin’s surface. Light is largely reflected and scattered away from the skin.

What does SPF mean?

The SPF value indicates the level of sunburn protection provided by the sunscreen. All sunscreens must be tested by an SPF test procedure. The test measures the amount of UV ray exposure it takes to cause sunburn when a person is using a sunscreen in comparison to how much UV exposure it takes to cause a sunburn when they do not use sunscreen. The product is then labeled with a certain SPF value indicating the amount of sunburn protection provided by the product. Higher SPF values (up to 50+) provide greater sunburn protection than lower values. Since SPF values are determined by a test that measures protection against sunburn caused by UVB rays, SPF values only describe a sunscreen’s UVB protection, not UVA (U.S Food and Drug Administration).

What does ‘broad spectrum’ mean?

Sunscreens that offer protection from both UVA and UVB rays are labeled as broad-spectrum.

What SPF value should I look for in a sunscreen?

Only broad-spectrum sunscreens with an SPF of 15 or higher can claim to reduce the risk of skin cancer and early skin aging if used as directed with other sun protection measures. Any sunscreen not labeled as broad-spectrum and those with an SPF between 2 and 14 can only claim to prevent sunburn (U.S Food and Drug Administration).

At AlumierMD, we recommend using an SPF of 30 or higher. An SPF of 30 blocks 96.7% of UV rays so that only 3.3% will get through, compared with an SPF of 15 which blocks 93.3% of UV rays and lets through 6.7% – twice as much.

Why is zinc oxide used in all AlumierMD sunscreens?

Zinc oxide is a safe, gentle and natural mineral that blocks both UVB (burning) rays and UVA rays that are associated with photoaging and skin cancer. Also, since zinc oxide just sits on the skin to provide sun protection, it is comfortable and non-irritating.

AlumierMD’s sunscreens do not contain small molecule chemical filters.

Learn more about Sun Protection.


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