DiMattia,
Muscles are not earned easily and with Thalassemia Major/Inter it is even more difficult. I am thal major and do body building and have gained descent muscles given the medical limitations I have. I can assure you to gain muscle, however, your mentioning of HGH right after saying you are not gaining muscle is perhaps indicating your looking for results too fast. As I started the post, muscles are earned and it takes years of dedication to a certain lifestyle that earns that. People are mistaken when they think they can turn their bodies into rock solid mountain by taking steroids and hormones. There are no shortcuts! You have to commit yourself to what it really takes to build healthy muscle.You can follow these steps to transform your body
1. Healthy diet divided over 5-6 meals a day with no more than 3 hours break in between.
2. Gym training of no more than 1 hour, 4 days a week.
3. Whey protein, multivitamins, minerals and antioxidants.
4. Sleep of no less than 7 hours
If you can follow these consistently you will start seeing results in 3 months. Remember, muscle gaining is a 24 hour sport which makes it perhaps the most difficult sport in the world.