Answers:
I'm not sure if within has been studies done on it, but it does contain chemicals. But surrounded by any case it is always better than tanning bed or laying out in the sun!
better than the sun or tanning bed ...clearly, I wouldn't think it would hurt unless you used it all the time
It's completely harmless. The Jergens Natural Glow to Sally Hansen Spray Tan are all great, safer ways to bring a healthy, back-from-the-beach glow.
Dermatologists will transmit you to use it instead of actual sun or tanning beds.
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