Why alotvof people use anabolic steroids without gitting any side effects ?

There isnt good data: With any medication, side effects usually occur in some percentage of people. For some drugs, certain side effects may occur in a high percentage, but for most, particularly with serious side effects, they only occur in a minority. It often depends on how much & how often you use it, in which form, and your own biology, other medications, other illnesses or predispositions, whether you get them.