If your child eats has a healthy balanced diet, including fruits, veggies, meats, grain, and dairy he should not need vitamins. Only toddlers that are very picky eaters or toddlers who's parents do not serve them appropriate food items need vitamins.
Yes, it IS important for your child to have red mean for not only iron, but protein. Fish is also a very good source of these vitamins and minerals - your 14 month old should be eating regular meals of the same foods that you do, at least at breakfast and dinner. He should be on all table food at this point, NO BABY food.
You also do not need vitamins for fluoride - most local tap water is fluoridated, which is why most, if not all, pediatricians recommend parents serve their children tap water and never bottled water when at home.
And just as a response to the woman above me:I live in San Jose, CA a very LARGE CITY and Ive never heard anything as ridiculous as prescription fluoride. If you brush the teeth of your children twice a day, NO prescription should ever be necessary. And unless it is your way of life to raise your children red meatless, a toddler should be fed A BALANCED DIET with all food groups accounted for, including meat and protein. If you are a vegan or vegetarian, then your children need vitamins as they do not get the nutrition their bodies need to grow, especially when it comes to brain development.