My friend has a Hyperactive thyroid which he has been taking medication for for years. The medicine is called Synthroid. His condition makes it nearly impossible for him to gain weight. He eats between 4-5000 calories a day from fast food, and is ripped to shreds(I envy him). But because of this condition he also finds i very hard to gain muscle. He is 21 and has been working out for 3 years now. He cannot put on mass, and has puny 13.5 inch arms. Even though he is small, his muscles are well developed and he is very strong. He wanted to know if it was safe for him to get on a cycle. If so, what do you guys reccommend for a first cycle of someone in such a situation.

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