Each day, Dr. Bilu Martin and the the staff at Premier Dermatology, MD get asked-- do I really need to wear sunblock?  The answer is YES!  Exposure to the sun increases the risk of skin cancer.  Taking a daily vitamin D supplement and eating foods rich in vitamin D should be sufficient to maintain healthy levels of vitamin D.  For more information, visit the American Academy of Dermatology's website.

SO WEAR SUNBLOCK.  Every. Single. Day.

Now, there are some guidelines to follow.

1. Sunblocks should be broad spectrum, meaning they block both UVA and UVB rays. 

UVA rays cause the signs of aging (A for Aging): wrinkles, brown spots, and loss of elasticity (read: loose skin).  They pass through clouds and are unaffected by weather.  UVA rays also cause skin cancer. 

UVB rays cause sunburns (B for burning), and vary with the time of day and season.  The SPF rating on sunscreen means the level of protection against UVB rays only.  Sunblocks should be at least an SPF 30.  Anything higher than that doesn't make much difference.

2. Sunblocks consist of two classes of ingredients: chemical blockers and physical blockers.  Chemical sunscreens need to be applied 30 minutes before sun exposure so that they can be absorbed into the skin.  Physical blockers, such as zinc oxide and titanium dioxide, sit on the surface of the skin and work immediately.  So which is better?  Many sunblocks contain a combination of the two classes.  Some people are irritated by chemical sunscreens, in which case a physical block would be better.  Physical sunblocks also tend to be more sweat resistant (which is handy for exercising). 

3. Sunblocks must be re-applied every two hours, and immediately after swimming or excessive sweating.  Use the right amount: a teaspoon full for the face; a shotglass full for the body.  

At Premier Dermatology, MD, in Aventura, we recommend and carry many sunblocks.  Here are just a few we love:  

EltaMD UV Pure SPF 41: a broad-spectrum, chemical-free sunscreen.  It's great for kids and adults whose sensitive skin can be irritated by chemicals.  It's also fragrance-free, paraben-free, and noncomedogenic (as are all the EltaMD susncreens). Dr. Bilu Martin puts it on her kids every single morning, rain or shine. 

EltaMD Physical SPF 47: also a broad-spectrum, chemical-free sunscreen.  It has a universal tint, so it doesn't appear as "white" on the skin as the UV pure.

EltaMD UV Clear SPF 46: for acne or rosacea prone patients, this broad spectrum sunscreen contains 5% niacinamide, which helps calm redness.  It will not cause breakouts and is very light. 

Skinceuticals Physical Matte UV Defense SPF 50: a tinted, broad spectrum, chemical-free sunscreen with a matte finish.  Feels like a bb cream; very cosmetically elegant.

Keep in mind that these sunblocks are only sold to physician offices and authorized dealers.  If bought from an unauthorized website or retailer, you may not be getting the genuine product.  

Don't skimp on sunblocks and just pick any cheap one.  In south Florida, protecting your and your family's skin with a sunblock that is effective is so important all year round.  A single blistering sunburn in childhood or adolescence more than doubles a person's chances of developing melanoma in their lifetime.  Protect your precious skin!