David Goggins on Instagram: "I have been hearing people run their mouths about me ever since I came on social media. All these so-called experts in the fitness world. I laugh at all of your comments. I hear and see them all - I run too much, I lack nutrition, I don’t eat enough, I have too much excess skin from when I was fat, I have a grandpa bod, etc. I am 49 years old and don’t take any testosterone of any kind, no boosters, no TRT, no over the counter testosterone boosters, I don’t even take