Hi RyanK

As far as Vitamin B12 is concerned, mrsD knows a lot about this - she will be able to advise you.

More generally, and this is just my opinion, provided that somebody eats in a healthy way (along the lines that mrsD has suggested) and does not have any medical problems (a full clinical investigation from your GP can help here, possibly with help from a professional dietitian) their nutritional needs (including vitamins) can usually be met from their food so there is no need to eat supplements.