I am assuming by when you said not good for humans that you meant these bowls would be for food purposes. Not sure which fruit wood isn't good but I have some apple, cherry, walnut and plum bowls which I have never had a problem with. I eat out of one or the other every morning having my cereal. I either use General Finishes Seal-A-Cell followed by Arm-R-Seal or Minwax Antique oil. Ernie Conover had told me in a e-mail that Antique oil is all he uses on anything he turns including his utility items. Any finish is food safe if cured 72 hrs or more. The only other finish I have used on bowls in Mike Mahoney's walnut oil. I have some dinner plates we eat off of 3 or 4 times a week with that on them.