Each SZN pouch contains 100 mg of caffeine, roughly the same as a strong cup of coffee. Because the pouch rests under your lip, the caffeine is taken up gradually rather than all in one go.
A few sensible notes:
Contains caffeine. Not recommended for children or pregnant women.
Start with one pouch and listen to your body before having more.
If you are sensitive to caffeine, avoid using a pouch close to bedtime.