Search by keyword or browse our list of services.
Find a provider by specialty, location, or availability.
See current studies testing new drugs, devices, and equipment to find better ways to treat and help patients.
For life-threatening emergencies, call 911 without delay.
Search by specialty and location.
Receive the highest level of care from the region's leading providers.
Find a lab or imaging facility close to you.
Visit us to pay bills, ask billing questions, or request billing records.
Sun protection factor (SPF) is a number on sunscreen labels that shows how long skin can be in the sun and maintain a low risk for sunburn. The higher the SPF number, the longer it protects a person from the sun's burning rays.
It is important to read the information on the sunscreen label about the SPF factor listed on the label and how much protection it gives the skin. The sunscreen should be applied according to the directions on the label so it is most effective in protecting the skin from the sun's ultraviolet rays.
No sunscreen gives total protection, but "broad-spectrum" sunscreens that contain ingredients such as avobenzone, benzophenones, cinnamates, salicylates, sulisobenzone, titanium dioxide, and zinc oxide usually protect from ultraviolet A and B (UVA and UVB) rays. The label of the sunscreen product will say what types of UV rays it protects the skin from.
Sweating heavily, swimming, or doing other water activities reduces the SPF because sweat or water on the skin will reduce the amount of protection the sunscreen provides. Sunscreen needs to be reapplied more frequently during these activities.
To learn more, visit Healthwise.org
© 1995-2015 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
How do you define health? Physical? Mental? Social? Health goes beyond medical care. It's how we take care of ourselves, how we interact with our communities, how we take care of each other.
Let St. Luke's support your health, however you define it.