I have had much success with using vegetable juices in my soaps. I make a tomato mint soap as well as a carrot soap. Both I use the pureed juice instead of water. From everything that I have read, and in testing the products before I starting selling them, that the vegetable juices provide some natural benefits... carrots are great for moisturizing and tomatoes are a natural astringent. I have some customers with oily skin prone to break outs that only use the tomato soap and it works for them. Burt's Bees makes a wide variety of vegetable soaps with using the natural pureed juices. I have also used purred cucumbers and have not had issues with any of them. I think like Robin said, the key to adding things is trial and error and not using too much. I have tried strawberries and various other fruits and they have turned brown and nasty. HTH.