After scaling, it comes out to 6.5 grams per day. (See my comment above.)

DO NOT take 80g taurine in a day. You probably won't die, but it's a terrible idea.

It would likely be less. See approaches like allometric scaling of dosages.

They also fed female rhesus monkeys 250mg/kg taurine - 1/4 of the mice dosage.

Makes the value-calculations even more palatable (does taurine have flavour?)

Mice have faster metabolism, so eat more of everything per kg of body weight per day. Square-cube law in action!