Susan...Good question. I have concerns for all products with (unsafe) chemicals...whether we put them on or in our bodies, use them in our homes & other environments or are exposed in any other ways. BUT, we all use them.
I'm afraid I don't know much about "spray tans" nor the tanning beds/booths that millions of people use. Other than the "warnings" I have read, that should be enough for anyone with half a brain, but we humans don't work that way, do we?
Funny thing, all these years, I thought the sun was good for tanning (in moderation) I must have missed the memo?
I often wonder if the same individuals who like to change the color of their hair, skin, eyes & various other parts...would take a pallet of paints out to the woods & forests during the breathtaking beauty of Autumn, to "improve" what nature produced?
I keep looking at your question.....it seems you are asking......"Do you WORRY"...but do it anyway? LOL.....We humans are very strange animals, are we not? You are gorgeous, the color that you are!!