Yup, Catabolism up the ass. I've been taking amphetamines daily for 3+ years trying to loose weight(10+ for ADHD) and I'm pretty sure I've just been stuck in catabolism the whole time. There were two major periods of time where I really lost a good amount of body fat. One was when I first started to loose weight with amphetamines, I dropped from 250 to 190 in three months. I was pretty much shitting out str8 lard lol great transformation, I would eat a sausage egg and cheese on crosaunt from dunkin donuts with a powerade, and at night I would eat a heft double decker roast beef, always the same routine and was doing A LOT of manual labor. The other time I actually lost body fat on amphetamines was during the next summer, I was in catabolism for a bunch of months but I slowly drifted away from my friends constantly going bike rides instead of hanging out, trying to loose weight. I was up to 90mg and eating about 4 steak tips every 4 hours, and somehow I went from catabolism to loosing body fat and went from 190 to 165. Ended up gaining everything back when I stopped taking amps really fast (because I was crazy from being anti-social and I blamed that on amphetamines) and now a year later again I think I just need to stop taking amphetamines so I can eat more and stop catabolism and just metabolize fat the right way.