The general recommended daily protein intake for adults is about 0.8 grams of protein per kilogram of body weight. For example, for a person weighing 165 pounds (75 kg), this translates to approximately 60 grams of protein per day. However, many experts suggest higher amounts depending on age, activity level, and health goals.

Protein Needs by Age and Activity

• Adults aged 18-30: about 0.8 to 0.93 grams per kg of body weight.
• Adults over 50: recommended intake increases to about 1.2 to 1.6 grams per kg to help preserve muscle mass and overall health. For a 165-pound adult, this means roughly 90 to 120 grams per day.
• Physically active individuals or those who do strength training may need from 1.1 up to 1.7 grams per kg per day.
• The intake for older adults or athletes may even go as high as 2 grams per kg in some cases.

Other Considerations

• Protein should ideally be consumed with every meal to maximize muscle synthesis, aiming for about 20 to 35 grams per meal.
• Protein sources include animal products (meat, fish, eggs, dairy) as well as plant-based sources like beans, tofu, nuts, and certain vegetables.
• Protein needs can also be influenced by pregnancy, lactation, illness, or recovery from surgery, where higher intake may be necessary.

In summary, a sedentary adult typically needs about 0.8 grams of protein per kilogram of body weight per day, but higher intakes are beneficial for older adults, athletes, or those recovering from illness or surgery.