I never dip/add anything, and I've not had anything turn out-and-out brown. While the apple slices aren't quite white, they are certainly not brown. Same with potatoes...just a darker ivory. The strawberries just turn a darker shade of red, but again, not brown. But the reason I dry my own is so that I will have healthy food, vs "pretty" stuff that has been treated with all sorts of chemicals to the point they are actually fake looking.
I agree with you on the "natural" aspect, which is why I don't buy many dehydrated items from the store. Have you tried dipping items in pineapple juice or lemon juice to help? Does it help much?
"Hold on, my friends, to the Constitution and to the Republic for which it stands. Miracles do not cluster and what has happened once in 6,000 years, may not happen again. Hold on to the Constitution, for if the American Constitution should fail, there will be anarchy throughout the world."
- Daniel Webster
When I am afraid, I put my trust in you. In God, whose word I praise, in God I trust and am not afraid. What can mortal man do to me?
Everything that lives and moves will be food for you. Just as I gave you the green plants, I now give you everything.