I think any time you retain water, wether it be from estrogen or sodium, your BP will rise. I found I can keep mine lower and in the safe zone by cutting out most of the sodium in my diet, sodium causes water retention, so yes if BP dosn't move while on cycle I think its safe to say you probably have a good diet or you don't have too much estrogen. Most people just can't stand the taste of bland food missing salt, but its just one of those things you have to train yourself to get use to. Especially if on a cycle, at least for that short amount of time tell yourself to keep your diet in check, low sodium, that is for people who have BP issues.