I'll give an example of a stack taking advantage of synergy of steroids. Say tren gives u massive gains in strength and mass and u love it, but it kills ur appetite... so u stack it with some dbol or eq bam ur hungry as a horse and have this powerful tren in ur body so u get massive from the increased appetite and the tren. Or say u can't sleep on tren and it kills ur appetite. Hgh, eq, tren bam u can now sleep good and are hungry all the time. Or say deca gives u deca dick. Obviously u would run test with it then and no more dexa dick. Win my Drys out the joins, deca lubes them up. Stack the two and ur good. This is why guys stack gear bro. If ur smart about it u will have almost no sides and ur gains will 've incredible.