My GI doctor said if I take Flintstones vitamins to take 2 a day for an adult. I like the taste of those best - reminds me of my childhood when my mom would say "these aren't candy!"
Regular vitamins come back out in full form with me so I have to take a chewable or a liquid. Liquid are to darn expensive for me. I'll stick to my flintstones complete w/iron.