text: what is the best age to start taking real vitamins not the flinstone kind? i'm 28 years old and somewhat active. i was taking one a day weight smart, but i heard that they cause cancer in the long run. what type of vitamins should i take and please name some thank you i don't know if there is a best age for taking "real" vitamins. my mom had me start taking "real" vitamins when i was about 7 or 8. i take calcium, multi-vitamins, and vitamin c almost every day. there are many other supplements that you can take if you think you are deficient in a certain area.  but don't just rely on vitamins and not eat right.  fresh fruits and vegetables contain many vitamins and minerals that are essential to your body's health.  exercise is also essential in the proper absorption of vitamins and minerals.