Spf 55 how long

References for this information: Clinics in Plastic Surgery, volume 43, , pages — Journal of the American Academy of Dermatology, December , pages Sunscreen SPF All skin types. Clear Moisturiser SPF Combination skin, Oily skin. Product out of stock. This product is sold out at the moment. Fill in your email address below and we'll gladly send you an email as soon as it is back in stock! Normal skin, Dry skin. Using sunscreen products that contain antioxidants gives you another layer of protection.

Wearing sun-protective clothing, sunglasses and wide-brimmed hats is also important in total sun protective care. Cover up, slather up and read up! Think about it: we are hardwired to check the nutrition facts on foods before eating them, but we should also always check the drug facts on sunscreens. On the market for a new sunscreen? From the latest hair and makeup trends to the best solutions for your skin issues, we've got all your beauty concerns covered!

We cannot search for an empty value, please enter a search term. Dermstore Editors. There is normally more than one and often up to six or more active ingredients in most sunscreens. The emulsion — the lotion, milk, cream, oil, foam or gel — is what carries the active ingredient. It is usually made up of some combination of oil and water, plus other goodies. These are important as they preserve the product so it lasts on the shelf or in your cupboard.

They also help with water resistance, influence how the sunscreen feels and smells, and how well it binds to the skin. Sunscreen provides a screen , not a block. In the same way, the sun lotion or potion of your choice allows some small amount of UV radiation onto your skin.

SPF stands for sun protection factor. The higher the number, the less UV passes through. An SPF of 30 allows one-thirtieth or 3. This means it filters Put another way, if your unprotected skin would take ten minutes to show signs of burning, then properly applying SPF 30 sunscreen would slow the rate of burning to the point where it would take 30 times longer, or minutes in total.

But this is perfect world stuff. Laura is an editor at Live Science. She edits Life's Little Mysteries and reports on general science, including archaeology and animals. She has won multiple awards from the Society of Professional Journalists and the Washington Newspaper Publishers Association for her reporting at a weekly newspaper near Seattle.

Laura holds a bachelor's degree in English literature and psychology from Washington University in St. Louis and an advanced certificate in science writing from NYU. Live Science. Laura Geggel.