Many people believe or at least want to believe that multi-purpose products are great, but do they work?  Is it possible that mixing certain ingredients may actually be more harmful than helpful?  A Beauty Brains reader recently asked specifically about the combination of sunscreen and insect repellent products “in-one.”  She was told that it was dangerous, and wondered if this was true.  The Brains thoughtfully explain that there is some reason for concern; according an Associated Press report there have been studies conducted “that indicate mixing sunscreen actives with DEET (the insect repellent active ingredient) might not only increase skin penetration of DEET but also reduce efficacy of the sunscreen” (The Beauty Brains).

The Brains warn, while two-in-one products sound great, you must consider the function/use of each product individually.  Insect repellents are meant to be applied occasionally (to prevent over exposure) while sunscreen should be applied in large amounts more frequently.  It’s a tough balancing act to get adequate use of each ingredient, so you may be better off sticking to separate products.

[via TheBeautyBrains.com ]

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