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sun block

A chemical preparation, such as zinc oxide, that is applied to the skin to protect it from the ultraviolet rays of the sun.


Public health An opaque substance, usually formulated from zinc or titanium oxides, designed to completely prevent solar radiation from reaching the skin. See SPF rating. Cf Sunscreen.

Patient discussion about sunblock

Q. what does a sun block cream do? and what are a UV rays?

A. It blocks out harmful Ultra violet rays from the skin as the previous entries have related; however it can also block your ability to produce vitamin D. If you live in a northerly area or one that receives limited sunlight, its recommended to get at least 15 minutes of sun a day (this is probably best done with minimal sunblock) and according to personnal sun sensitivity. Another thing to keep in mind is that sunblock works best if applied 20 minutes before sun exposure.

More discussions about sunblock
References in periodicals archive ?
While the lack of sunblock use exposes residents to the risk of contracting skin cancers, it can also increase their risk of suffering from melasma, a disease indicated by dark spots and hyper-pigmentation on the face.
Family Natural Sunblock SPF 45 helps protect skin from harmful free radical damage caused by the sun's ultra-violet rays and nurtures skin with enriched moisturizing Vitamin E, Shea Butter and antioxidant Green Tea Extract.
Most folks may not apply sunblock, but many consumers do use skin care products with UV protection.
Unfortunately, most people apply too little sunscreen or sunblock too infrequently to get its full protection," says Duke University's Sheldon Pinnell.
which pulls double duty as SPF 15 sunblock, and the tick-and-insect repellent Swy Flotter ($8, 4 oz.
For everyday ultra-sheer protection: Banana Boat Sun Wear[TM] Daily Sunblock Lotion SPF 50
Hawaiian Tropic, for example, has introduced Splash 30 SPF sunblock for Kids, which, unlike some children's products on the market, contains "no dyes or artificial colors to stain clothes.
I've always tried to cover my arms and put sunblock on my hands but they are getting worse.
Slather on lots of sunscreen or sunblock with a sun protection factor (SPF) of 15 or higher (see "Sunscreen screen test," left).
NEUTROGENA(R) has introduced Ultra Sheer Dry-Touch Sunblock SPF 100+ with superior photo-stabilized Helioplex technology.
While broad spectrum sunblocks are the "gold standard" for photo-protection, Dr.
In addition to featuring the breakthrough sun protection technology complex, AVEENO(R) adult sunblocks contain natural soy and vitamins A, C and E to help shield skin from environmental damage and even skin tone and texture, and AVEENO(R) Baby CONTINUOUS PROTECTION(TM) with SPF 55 contains natural colloidal oatmeal to help prevent moisture loss and soothe skin.