Question: how to increase igf 1?
Answer: Lose body fat. The amount of belly fat you carry is directly related to your HGH production ( 3 ). ... 
Fast intermittently. ... 
Try an arginine supplement. ... 
Reduce your sugar intake. ... 
Don't eat a lot before bedtime. ... 
Take a GABA supplement. ... 
Exercise at a high intensity. ... 
Take beta-alanine and/or a sports drink around your workouts.