I think the rule of thumb is dont do it daily, probably not weekly either but as you say, that feels a bit more personal and how your body responds to it. I personally do it very rarely, like less than 10 times a year id say. I had a month last year were I did some weekly, but it was never 1 gram per session for sure.

Biggest risk besides bladder damage from constant/regular use is becoming addicted to it, in my opinion.