Mark, ya' know, I couldn't find it on my bottle either. You could likely call the manufacturer or visit their web site to find out for certain, but, now I'm questioning solubility too. Good for you on the lactose removal from your diet. Can you tolerate soy? If you can, there is a wonderful ice cream made with soy called Soy Delicious. Chocolate Almond is fabulous. Dreyer's Sorbet is also delicious and has no dairy. Rice Dreams is another milk free ice cream, but I don't personally care for it as well as Soy Delicious. To see if you are soy tolerant, you might try tofu, or Silk Soy milk before venturing on to Soy Delicious. Some of the Soy Delicious products are sweetened only by fruit juice and they taste pretty darned good. Amy's frozen foods out of California makes a good soy cheese pizza and macaroni and soy cheese. Most of these can be found in well stocked health food stores, or Whole Foods. Dreyer's Sorbet is available at most grocery store. Also, despite Heather's penchant for wheat products, sorry, but they're a no-no for me personally. From what I've read there's a lot of us who can't tolerate it. I love Heather's book, but there was some dietary advice that wasn't right for me. You might try going off wheat for a week and see if it helps. When I started having to find milk/wheat free products 7 years ago, it was near to impossible. There are far more choices available today. You'll have to go through some trial and error to see what works and what doesn't. Hope to see more posts from you. Best of luck. --Cindy