What the best sunscreens have

  • Broad-spectrum UVA/UVB protection.
  • Adequate SPF rating. Sunscreens should have an SPF rating of 15 or higher for daily usage and at least 30 for extended periods in the sun. Most experts say that anything higher than SPF 50 is overkill.
  • Antioxidants. Studies show that antioxidants -- including vitamins C and E, green tea extract, and grapeseed oil, among many others -- help to boost the protective power of sunscreen and have additional anti-aging benefits to skin.
  • Smooth and easy application. Keep in mind that consistency and texture is a subjective matter -- those with dry skin may be obliged to go with something thick and emollient while those with oily skin will appreciate a lightweight sunscreen with a matte finish.
  • Water resistance. New FDA guidelines require manufacturers to state how long they maintain their SPF level while in water: either 40 or 80 minutes.

Know before you go

Do you have any allergies to key ingredients? Adverse reactions are commonplace with skin care products and sunscreen is no different. Some users cannot tolerate avobenzone and other chemical sunscreens. Titanium dioxide and zinc oxide are generally considered to be the most gentle sunscreen options perfect for kids and those with sensitive skin. Keep in mind that other ingredients, such as fragrance and preservatives, may also cause a reaction. It's always a good idea to test sunscreen on a small patch of skin before applying it liberally -- especially if you have skin sensitivities.

Value expectations: the dollars and cents of it

When comparing the prices of various sunscreens, keep in mind that one bottle isn't likely to last you very long if you're applying it correctly. Experts say the SPF ratings on the bottle can only be realized when you apply enough product. For adults that's one ounce of sunscreen for full-body coverage -- equivalent to two tablespoons or a palmful. Furthermore, for adequate protection, sunscreen should be reapplied often.

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