How much protein do you need?
Protein needs are based on weight rather than calorie intake. Adults should eat at least 0.8g of protein per kilogram (2.2lb) of body weight per day. A higher intake may help to lower your risk for obesity, osteoporosis, type 2 diabetes, and stroke.
Older adults should aim for 1 to 1.5 grams of protein for each kilogram of weight. This translates to 68 to 102g of protein per day for a person weighing 150 lbs.
Divide your protein intake among meals but aim for 25 to 40g of high-quality protein per meal; less than 15g won’t benefit bone or muscle.
Get plenty of calcium (1,000 to 1,200 mg per day).
Source: Environmental Nutrition