Boost Drink

I understand that Boost is lactose free and gluten free.  Has anyone had these during those times that you are just too sick to your stomach to eat anything?  How does it fare with you?

My husband is lactose intolerant and also losing weight. I bought him Boost Vanilla and was told it could be used with lactose intolerance. It says right on the label it has some milk protein. He tried it for 3 days and felt bad the entire time.  He stopped using this product and felt better. Three days later he tried one more bottle. It is either the Boost or quite a coincidence.  I hate wasting money trying products that cost that much just to find out if we can use them. I had contacted the company and asked if there was anywhere I could get a free sample, and the answer, of course was "no".