What vitamins can't you overdose on?

Viatmins-Safe Use: Water soluble vitamins such as Vitamin B and C are generally consider safer as any excess is removed promptly by your kidneys. That said, all vitamins taken in excess can cause problems so I recommend to read the label on your vitamin bottle and follow the directions.

All: fat soluble vitamins A,D,E,K are stored to a large extent in the body hence are more prone to cause adverse effects than water soluble vitamins that are readily excreted in the urine with limited storage. The cause adverse effects when taking in large amounts like C and Niacin