Mmmmmmm.....I don't know about the Flintstones chewable anymore. The nut said that post op they were ok but after I started having vitamin deficiency problems, my surgeon said get on something else and is now advising all his patients to use B.A. or something else. I have a Vitamin D and Vitamin A deficiency now and have to take 50,000 IUI of D, 2 times a week for the next few months and an A vitamin. I was reading the back of the bottle and really, those vitamins are really not enough even though it says adults can take them because they were designed for children and not people who may have issues of not getting enough nutrients thru food, like us. They are not gonna have a huge dose of anything because it is for little bodies. lol! I think once you get further out post op, its better to find an adult vitamin vs. Flintstones. I know some people still take them or love them but after my vitamin issues, I don't trust using them anymore. I just started taking Bariatric Advantage and I love them! And because I am low income, I get them for free, so that makes it even better for me. When I have my labs done again, I hope to see much improvement because this months was bad.