So, how much protein should seniors eat? The most commonly cited standard is the Recommended Dietary Allowance (RDA): 0.8 grams of protein per kilogram (2.2 pounds) of body weight per day. For a 150-pound woman, that translates into eating 55 grams of protein a day; for a 180-pound man, it calls for eating 65 grams.
Seniors may need 1.0-1.3 grams of protein for every kilogram of body weight. For example, if you weight 180 pounds this could mean consuming 80-104 grams of protein every day, regardless of your calorie intake.
The current recommended dietary allowance for women older than 70 years is 0.36 grams for each pound of body weight or 46 grams of protein for a 130-pound woman. This amount is the same for all women 19 and older.
It has been reported that the optimal dose of dietary protein consumption in a meal that results in a near maximal anabolic response is ~35 g/meal  or 0.40 g/kg/meal of high-quality protein in elderly adults , translatable to 1.2 g/kg/day or 96 g/day for an 80 kg elderly adults.
While exercise buffs have long used protein supplements to gain muscle, new research from McMaster University suggests one protein source in particular, whey protein, is most effective for seniors struggling to rebuild muscle lost from inactivity associated with illness or long hospital stays.
After reviewing additional evidence, an international group of physicians and nutrition experts in 2013 recommended that healthy older adults consume 1 to 1.2 grams of protein per kilogram of body weight daily — a 25 to 50 percent increase over the RDA.
To determine your daily protein intake, you can multiply your weight in pounds by 0.36, or use this online protein calculator. For a 50-year-old woman who weighs 140 pounds woman and who is sedentary (doesn’t exercise), that translates into 53 grams of protein a day.
14 Easy Ways to Increase Your Protein Intake
However, older adults should not routinely drink protein shakes instead of meals, Gallo cautioned, adding: “That’s a bad idea that can actually result in reduced protein and calorie intake over the long term.”
Eating too much protein can worsen kidney problems, and over time can cause symptoms like bad breath, indigestion and dehydration. Certain sources of protein like meat, dairy, and processed foods can increase the risk of chronic illnesses like heart disease and cancer.
Vegetables with the most protein include broccoli, spinach, asparagus, artichokes, potatoes, sweet potatoes, and Brussels sprouts, which typically contain 4–5 grams of protein per cooked cup ( 69, 70, 71, 72, 73, 74, 75 ).
A healthy eating plan emphasizes fruit, vegetables, whole grains and low-fat or fat-free dairy; includes lean meat, poultry, fish, beans, eggs and nuts; and is low in saturated fats, trans fats, salt (sodium) and added sugars.
Recommendations for how much protein is enough for older people vary, but current studies suggest that most people over age 65 should take in about 1 g to 1.2 g of protein/kg of body weight per day to both gain and maintain muscle mass and function.