The recommended daily protein intake varies based on factors like age, activity level, and weight, but for an average sedentary adult, it is about 0.8 grams of protein per kilogram of body weight per day. For example, a person weighing 75 kg (165 pounds) should consume around 60 grams of protein daily. For those who exercise or are over 40-50 years old, the needs increase to approximately 1.1 to 1.7 grams per kilogram, depending on the intensity of activity. Protein should generally account for about 10% to 35% of daily caloric intake.

Summary of Protein Intake Recommendations:

• Average sedentary adult: 0.8 g/kg body weight (about 60 grams for 75 kg)
• Adults over 40-50 years: 1.0-1.2 g/kg to prevent muscle loss
• Regular exercisers: 1.1-1.5 g/kg
• Strength training or endurance athletes: 1.2-1.7 g/kg
• Excessive intake: More than 2 g/kg is not typically recommended

Additionally, protein should make up 10-35% of daily calories, roughly 50-175 grams on a 2000 calorie diet depending on individual needs and goals.