Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis Anabolism often gets treated like a single switch, but muscle growth depends on several systems that work together after training creates the initial stress. Gabriel Alizaidy, MD, MS The Gillett Health Podcast: Androgen Receptors, L Carnitine, Heat Shock Proteins, & More Hitting the Gym But Not Growing? The 'Secret Switch' Your Muscles Are Missing. Our Carnitine product, Gorilla Mode AR (androgen receptor) is now restocked! L carnitine supplementation is most advantageous for those with a deficiency. One of the more recently elucidated mechanisms by which it works