Like the other posts stated, your taste definetly goes. He'll have to eat, to nourish, not to enjoy. Not an easy thing to do at first, but you know you have to. I found using a straw when drinking boast and other drinks helped. That way it just goes to the back of throat and it's down! Also I was given samples by my chemo nurse of a product called Resurgex. I ordered them off of the internet. It's high in protein,and you mix it with water, so it's not milky tasting. I was able to get that down. I still use it for the calories and protein in my recovery. Make sure he takes in water also. Hope this helps.