Myself, heavyiron and Gena Marie noticed its effects within 1 week! heavyiron has always had issues with high blood pressure, after 1 week of Advanced Cycle Support Rx his BP was normal, no BS you can ask him yourself.
No experience but just using Hawthorn brought down my bp to a noticable degree. For my pct of choice it would have to be Primordial Performance's Testosterone Recovery Stack, TCF-1, Liver Juice ( if running methyl compounds ) and NAC for the same reson. Ive since started supplementing with Garlic extract and have noticed my bp go down a little bit as well.