My husband has a lot of weight to lose and he wants to start using Spark by AdvoCare. I’m afraid to get it for him because I’ve read that it can cause stomach issues in some people. I don’t want him to take anything that could be dangerous to his health. Is Spark safe for him to take or will it cause him intestinal issues that are far worse than simply being overweight? Some people think that just because something is sold to the public that it’s safe, but I know that isn’t always the case and want to know more before he starts using it.