Hello dear, Kigtropin is Human Growth Hormone produced by recombinant technology. It does not contain anabolic steroids. But, being a product of recombinant technology, there is always a risk of reaction due to antibody formation in the body. So, before choosing any such health supplement, it is advisable to consult your family physician once. Most of the weight gain supplements are prepared from herbal ingredients & do not have any side effects if taken in the optimum dose. Also make sure they do not contain steroids...as intake of such a supplement will cause harm in the long run. Moreover, you should not compromise on routine healthy food such as: 1. Consume more of natural diet like fresh fruits, green vegetables, milk, eggs, wheat, etc. 2. Avoid oily and junk food. 3. Stay away from smoking & alcohol. Most importantly, do not make hurry in building up muscles. The metabolism of the body functions at its normal rate & any measures taken to hasten up this process can be harmful. Wishing you a healthy life. Take care.