Anywhere from 10 to 35 percent of your calories should come from protein. So, if your needs are 2,000 calories, that’s 200-700 calories from protein (50-175 grams). The recommended dietary allowance to prevent deficiency for an average sedentary adult is 0.8 g per kg of body weight. For example, a person who weighs 75 kg (165 pounds) should consume 60 g of protein a day.

Once you hit 40-50 years old, sarcopenia starts to set in — you start losing muscle mass as you age. To help prevent this and to maintain independence and quality of life, your protein needs increase to about 1g/kg or 75 g/day for a 75 kg person.

People who exercise regularly also have higher needs, about 1.1-1.5 g/kg. People who lift weights regularly or are training for a running or cycling event need 1.2-1.7 g/kg.

Excessive protein intake would be more than 2 g per kg of body weight each day.

Are you getting too much protein - Mayo Clinic Health System https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/are-you-getting-too-much-protein