Directions say to take MGF-1 1 to 2 hours before a workout. If you are going to take a carb loader or other carbs before your workout it's best to take MGF-1 2 hours in advance. It will be in your system by the time you take in the carbs.
Why is this important? IGF-1 (insulin-like growth factor 1) is just that, insulin like. IGF-1 and insulin will compete for the same cell receptor sites if they are both present at the same time in the blood. For maximum results allow as much time as possible between taking MGF-1 and taking something that increases insulin.