Writing
Plain answers, no lecture

How much nicotine is actually in a Zyn?
A US Zyn has 3, 6, 9 or 11 mg of nicotine on the can. About half of it leaves the pouch in an hour. What the label means, per pouch and per can.

How many Zyn a day is too much?
There is no official daily limit for Zyn. What stands in for one: milligrams by strength, why a Velo can is different, and what two at once does.
How many nicotine pouches a day is a lot?
There is no official threshold, so here is the honest version — what typical use looks like, what heavy use looks like, and why almost everyone underestimates their own number.