How Much Sunscreen Are You Actually Using? Most People Get It Wrong
Sunscreen reduces the risk of both melanoma and non-melanoma skin cancers. But it only works at the amount it was tested at, and most people apply far less than that.
Studies show people typically apply 20 to 50% of the recommended amount. That turns an SPF 50 into an SPF 25 or lower, which means the bottle you bought is not delivering the protection printed on the label.
Three Things Worth Knowing
Amount matters more than brand. For full body coverage, aim for at least a shot glass of sunscreen. One spoonful to the face, one to each arm, two to the torso, one to each leg.
Price does not equal protection. Sunscreens are FDA regulated and must accurately state their SPF. Lower priced sunscreen is just as effective as expensive cosmetic brands.
Physical and chemical sunscreens work differently. Mineral sunscreens with zinc oxide or titanium dioxide reflect UV radiation. Chemical sunscreens absorb it. Both are recommended. The best sunscreen is the one you will actually wear every day.
Read the Full Guide in Our Education Hub
The Sunscreen Survival Guide covers all of this in depth, with the research behind it:
Physical vs. chemical sunscreens, and what the ingredient label tells you
What SPF numbers actually mean and how much UVB each blocks
Lotions vs. sprays, and why dermatologists prefer one
How to cut your annual sunscreen cost, which can range from $40 to over $1,400
When to reapply, and what the evidence says about the two hour rule
Skin Cancer Champions is committed to education, awareness, and advocacy for the skin cancer community.
