Being from a South Asian country, I've been taking Vit D3 pills combined with Calcium intake. And recently after a detailed checkup, I've been advised to take B12 as I'm a vegetarian and don't get much proteins majorly available in meat. I've chosen to ignore instructions on consuming supplements for Iron and Vitamin C, I want to include these through my diet instead.
Else I'll become ill just by consuming all those pills!