A 70-year-old needs more protein than the official government recommendation suggests. The U.S. Recommended Dietary Allowance (RDA) is set at 0.8 grams of protein per kilogram of body weight for all adults, regardless of age. But a growing body of evidence shows that older adults need significantly more, in the range of 1.0 to 1.2 grams per kilogram per day, to maintain muscle mass and physical function.
For a 150-pound person, that translates to roughly 68 to 82 grams of protein daily. For a 165-pound person, it’s closer to 90 to 120 grams. Those numbers are substantially higher than what many older adults actually eat.
Why the Official RDA Falls Short
The RDA of 0.8 g/kg was designed to prevent deficiency in the general adult population. It wasn’t calibrated for the specific challenges of aging. After 70, your body becomes less efficient at converting dietary protein into muscle tissue. This phenomenon, sometimes called anabolic resistance, means that the same amount of protein that maintained your muscles at 40 simply isn’t enough at 70.
The PROT-AGE Study Group, an international panel of geriatric and nutrition experts, formally recommended that healthy adults over 65 consume at least 1.0 to 1.2 g/kg per day. Australia’s dietary guidelines already reflect this shift: they recommend 1.07 g/kg for men over 70 and 0.94 g/kg for women over 70, roughly 25% higher than the U.S. figure. Stanford’s Lifestyle Medicine program goes even further for adults over 50, recommending 1.2 to 1.6 g/kg per day.
How to Calculate Your Personal Target
Start by converting your weight to kilograms. Divide your weight in pounds by 2.2. Then multiply by 1.0 to 1.2 for a baseline recommendation (or higher if you’re active or managing an illness).
- 130 pounds (59 kg): 59 to 71 grams per day
- 150 pounds (68 kg): 68 to 82 grams per day
- 165 pounds (75 kg): 75 to 90 grams per day
- 185 pounds (84 kg): 84 to 101 grams per day
If you’re recovering from surgery, fighting an infection, or managing a chronic illness, the PROT-AGE group recommends 1.2 to 1.5 g/kg per day. For someone weighing 150 pounds, that’s 82 to 102 grams daily.
Muscle Loss and Why Protein Matters More With Age
The real concern behind these recommendations is sarcopenia, the progressive loss of muscle mass and strength that accelerates after age 70. Muscle loss leads to falls, fractures, slower recovery from illness, and loss of independence. It’s not just about looking or feeling strong. Adequate muscle mass is one of the strongest predictors of quality of life and longevity in older adults.
Research consistently shows that a protein intake of at least 1.2 g/kg per day is required to maintain optimal muscle function in older people. Falling below that threshold, even while meeting the official RDA, can contribute to gradual muscle wasting over months and years. Many older adults don’t realize they’re losing muscle because the process is slow, often masked by stable body weight as fat replaces lean tissue.
Spreading Protein Across Meals
Hitting your daily total matters, but so does how you distribute it. Older adults need a higher dose of protein at each meal to trigger the muscle-building response that younger people get more easily. The threshold appears to be around 25 to 30 grams of protein per meal, with at least 2,500 to 3,000 milligrams of leucine (an amino acid that acts as a key signal for muscle repair).
This is where many older adults run into trouble. A common pattern is eating very little protein at breakfast (toast and coffee, perhaps a small yogurt), a moderate lunch, and loading most protein into dinner. That pattern means your body only gets one real opportunity per day to build and repair muscle. A more effective approach is aiming for roughly equal protein portions across three meals. If your target is 80 grams per day, that’s about 25 to 30 grams at each meal.
Good sources of leucine-rich protein include meat, poultry, fish, dairy products, and legumes. Eggs, Greek yogurt, cottage cheese, and canned tuna are practical options for boosting breakfast and lunch protein without requiring much cooking.
Exercise Changes the Equation
Protein alone isn’t enough to preserve muscle. Resistance training, even light strength exercises, works together with dietary protein to stimulate muscle maintenance. For older adults who are physically active or doing regular strength training, the evidence supports protein intakes at the higher end of the range, at or above 1.2 g/kg per day and potentially up to 1.6 g/kg.
The combination is more powerful than either strategy alone. Eating adequate protein without exercising still leaves muscle underutilized. Exercising without adequate protein gives your muscles the stimulus to grow but not the raw material to do it. If you’re going to invest effort in one area, investing in both yields the biggest return.
When Kidney Health Limits Protein Intake
The one important exception to “more protein is better” involves kidney disease. For older adults with mild kidney disease (stages 1 and 2), guidelines recommend avoiding protein intakes above 1.3 g/kg per day. For moderate to severe kidney disease (stages 3 through 5), protein needs to be restricted further, and the specific target should be set by a healthcare provider based on kidney function.
This creates a genuine tension for older adults with declining kidney function. They need more protein than the standard RDA to protect their muscles, but their kidneys may not tolerate the higher amounts. If you have kidney disease or have been told your kidney function is reduced, your protein target will look different from the general recommendations above, and it’s worth getting a specific number tailored to your lab results.
For healthy older adults without kidney disease, there’s no evidence that protein intakes in the 1.0 to 1.5 g/kg range pose any kidney risk.