Dr Peter Attia writes,
“The ideal amount can vary from person to person, but the data suggest that for active people with normal kidney function, one gramme per pound of body weight per day, or 2.2 grammes per kilogram body weight per day.”
Attia for himself gets this across the day in four servings, with at least one of them being a whey protein shake. So that works out as, “..a protein shake, a high-protein snack, and two protein meals.”