TOPIC: Health Regen Upgrade

I bought Scope boost recently, and i am not disappointed, i was thinking now of buying ammo boost next and Health Regen after it, but i've never seen how HP regen works, what are your guys thoughts on it? is it worth it? and does it regen fast or slow? does it help in raids or does it just like save your time not to buy the health chargers?
Cheers!

Slowly, not really worth the money but if you want to have all the upgrades I'd get fuel first.

For me it regenerates 4 health ~ every 4 seconds.

It's worth it to be honest.

I would recommend health boost, i have it myself and for what it does, i think it comes in more handy than you would expect.