[LitFan]

Agreed. I don't think it'd be unreasonable to do blood testing as part of a kid's regular checkup cycle. Doctors use metrics to determine whether kids are growing properly (height + weight, as well as a general visual check), but are those the best metrics? It's likely they're just "good enough".

[rfvdbvcvb]

Actually, weight and height are very good indicators of general health. Anyway, the information it gives is already more than appears to be in use.

There's no need for blood work to spot the obese three year old kid at day care who is well on the road to juvenile Type II diabetes. The poor girl is wider than she is tall. A simple BMI metric and the Dr. should be able to tell the parents they need to lay off the carbs.