Ehh… it would help, but 4 weeks isnt really long enough for any kind of PCT - post cycle therapy - . Sustain would be better suited for when you are ready to get totally off the TRT/anabolic androgenic steroids’s.
If your looking for a bridge, then original Dermacrine would be a better choice. (or in addition to the TRT) If the point of the 4 week break is to get your testes back, then you should be considering HCG - human chorionic gonadotropin - .
-Pp