Sadly a lot of leather conditioners have mineral oil, petrolatum or other petroleum distillates. My favorite conditioner is Bick 4. I tried a search to discover the ingredients but had no luck. I guess my clearance rating isn't high enough. I thought they were required to put that on SDS sheets. Anyway, they claim that it doesn't darken leather since it has no wax in it. It hasn't darkened anything that I have put it on so far. I have used it as a conditioner/polish as shown is this Springfield Leather video. As usual, JM2C. Jim