you can absolutely switch esters, people do it often but please dont listen to anyone saying sustanon is "better" because its not... its not going to...
everyone is different and some have a really hard time gaining weight.. you are going about it the right way with eating more etc... clearly its just...
you need to stop and pct and stop using steroids at your age... you are way too young and this should be taken as a sign and a good thing to you, not...