Hi Guys
I am 20 years old and my weight is 74 kilos(163.142074 pounds) and my height is 6.2 feet.I have been exercising for over a year now,i left gym for a month for some reason.Now my power is kinda increasing but no gain in muscle at all.This is my routine

Monday: Biceps/Triceps
Tuesday: Chest/Shoulders
Wednesday: Legs/Back
Thursday: Recovery
Friday: Biceps/Triceps
Saturday: Chest/Shoulders
Sunday: Recovery

Then on next monday Legs/Back and so on.My gym trainer changes the schedule after 3 months and he suggested me to take some supplements as i am not gaining any muscle.Now i went to a supplement shop and that guy over there told me to buy Creapure Mass Gainer,but when i googled i found only Creatines of Creapure.Also he told me to buy a hormone thing,it was something in liquid form and he said it will last 10 days.So guys please tell me are these supplements good for my body?Is there any harm or harmful effects of these supplements?Will these supplements cause hair loss problem?

Thanx