It is usually prescribed for those who lack adequate levels of testosterone in their body. This steroid even proves to the best for rapid fat loss and muscle gain. If you are thinking of using steroids which can help in muscle gain, here are such steroids which fit the purpose. These are as follows: Dianabol: Dianabol is the top best steroid for muscle gain. No other steroid can compare the amount of strength or muscle it can gain in a Equipoise AAS time. Anadrol: Anadrol is not much popular, but it is the second best steroid for muscle gain. You can gain 30lbs just within 4 weeks with the help of this steroid. Trenbolone: Trenbolone is one of the strongest steroids to gain muscles. It spikes in protein synthesis, promoting rapid muscle growth. It is known for insulin-like Boldenone undecylenate factor, a powerful muscle building hormone.