How IGF 1 and MGF drive muscle growth after training Gabriel Alizaidy, MD, MS posted on the topic LinkedIn Best time to take growth hormone? , Most athletes use it on an empty stomach, with the most common timing about an hour before bed., Consistency and timing make the difference., Watch the full IGF 1: Miracle Hormone or Health Hazard? Diet vs Disease Switched things up and have been using my IGF 1 LR3 30 mins pre workout and have been noticing longer lasting pumps and more vascularity so far! 2 more weeks until I cycle