Am 73. In hospital four months ago they gave me Boost. For potassium, I guess. So I started drinking Boost/Ensure 3 times a day. Got expensive. Now drink one a day and two glasses of chocolate milk. Works for me. But I do know, with some children, that chocolate milk can set off a sugar high. Kid will be bouncing off walls, ceiling.
Most of the chocolate milk I see at stores uses High fructose Corn Syrup. Though I love chocolate milk, I try to avoid the HFCS where I can.