Man therefore gets his vitamin A by eating plants which are rich in carotenes or by eating those parts of domestic animals which are rich in the vitamin itself: liver, butter and cream from milk; egg yolk; and cod-liver oil.
If the vamp is too loose, your heel may slip out of the shoe, while a vamp that is too tight can cause toe pain or numbness. Counter. The heel counter is the back of the shoe that holds the heel in place. A stiff counter offers greater heel control and stability.
1 Position the heel of one foot just in front of the toes of the other foot. Your heel and toes should touch or almost touch.  Choose a spot ahead of you and focus on it to keep you steady as you walk.