I am currently taking Vyvanse 40mg for ADHD. I am also attempting to gain muscle and optimize my nutrition around that goal. Assuming that I am overcoming the appetite suppression that comes along with Lisdexamfetamine (I am maintaining over 1.6g protein per kg of body weight, despite appetite), are there any detrimental affects of Lisdexamfetamine in relation to growth hormone levels or muscle building in general?