The general recommendation for daily protein intake is about 0.8 grams per kilogram of body weight (or about 0.36 grams per pound). This amount meets basic nutritional requirements for most sedentary adults. For example, a person weighing 165 pounds (75 kilograms) should aim for around 60 grams of protein per day. However, protein needs can vary based on age, activity level, and health status:

• Older adults (40-50+ years) may require more, about 1 to 1.2 grams per kilogram of body weight, to help prevent muscle loss.
• Those who exercise regularly or engage in strength training may need 1.1 to 1.7 grams per kilogram.
• Pregnant or lactating women also have increased protein needs.

In terms of total calories, protein should make up about 10-35% of daily caloric intake, with the average American consuming around 16% of calories from protein. It is beneficial to spread protein intake evenly throughout the day rather than concentrating it in one meal. In summary:

• Basic sedentary adult: ~0.8 g/kg/day
• Older adults: ~1.0-1.2 g/kg/day
• Active adults/athletes: ~1.1-1.7 g/kg/day
• Pregnant/lactating women: higher than average, depending on stage

The exact amount can be personalized with the help of a dietitian or healthcare provider based on individual factors.