New subscriber, but have been watching your vlogs (et al) for a while now, very impressed! Anyway, I recall you stating, albeit briefly, something about hypothyroidism causing muscle break down. I don’t recall the exact timing, but I started lifting 20 years ago (age 37) and packed on 40 pounds of muscle in one year (127 lb to 167 lb). I want to think I had not yet started on levoxythyroxin during that time of gain, and once I started taking it, I have not (for the most part) not seen muscle gains. Once I hit about 50 I was OK with just lifting for health, focusing more on HIIT type lifting. I find it very difficult to take in enough calories, and is it realistic that I would pack on more weight/muscle at my age (now 57)? Although I have no desire to weigh what you think I should weigh, I have regained an interest in heavier lifting and have started deadlifting and working on my squat/form - everything’s new (grip, stance, etc)! Anyway, I guess my question relates to your thoughts on hypothyroidism and muscle gain, thanks.
P.S. You would now call me severely underweight at 145; calories are hard to ingest for me, I am at 2,600 a day currently, eating clean to avoid spikes in cholesterol and blood pressure, 200 grams of protein daily, and just recently allowing the 3+ hour window for protein synthesis. You guys have changed a lot of what I do - and how I do it - so it’s sort of like starting over again.