It is usually prescribed for those who lack adequate levels of testosterone Andriol (Testosterone Undecanoate) their body. This steroid even proves to Andriol 40mg capsules 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 particular time. Anadrol: Anadrol is not much popular, but it is the second best steroid for muscle gain.