Advice some supplements or medication to help me to gain body mass and to bulk the body with no side affects. regular at gym.age 33.height 5'8"60kg?

Nutrition: I would rather emphasis on healthy nutrition, rather than supplements. To gain body mass, take food with high calories and good amount of proteins, in a balanced diet. Take food rich in micro nutrients, anti oxidants and variety of fruits and vegetables. The other aspect is to get correct work out along with food. Otherwise, you may end up being over weight, rather than building muscle.