How much caffeine at one sitting is too much?

[Assertive Guy]

depends how used to it you are. i occasionally use 300mg before i train. many footballers use 600mg during a 2 hour game.

then again, some people who never use it do so and get quite ill

im too tired to be more helpful

cheerios

From the research I've done they recommend staying under 650mg. I've done 1400mg, and I got majorly stressed out.

 

[caffeine]

200 mg can do 2 cups coffee