[shiftzor]

2 and a half hours after a meal you should be within 10mmol (180mg/dl) and 5mmol/L (90mg/dl). More importantly you should be within 2mmol/L (20mg/dl) of your post meal BG. High GI/Glycemic load meals can mean that your BG is still high at 2 and a half hours mark, but they will usually come down within the hour after that. Depends on the meal as fatty meals can cause spikes later on in the day, testing at the 4 hour mark and even 6 hour mark can highlight these problems. Basically only way to find out is to keep testing.