A 74-year-old woman needs more protein than the standard government recommendation suggests. The official Recommended Dietary Allowance (RDA) is 0.8 grams of protein per kilogram of body weight per day, but that number was designed to prevent deficiency, not to protect aging muscle and bone. A growing consensus among nutrition researchers and geriatric health organizations recommends older adults aim for 1.0 to 1.2 grams per kilogram of body weight daily.
In practical terms, a 150-pound (68 kg) woman at age 74 would need about 54 grams of protein per day under the old RDA. Under the updated recommendations, she’d aim for 68 to 82 grams daily. That’s a meaningful difference, and for many older women, closing that gap can help preserve strength, independence, and overall health.
How to Calculate Your Personal Target
The math is straightforward. Divide your weight in pounds by 2.2 to get your weight in kilograms, then multiply by 1.0 to 1.2. Here’s what that looks like across a range of body weights:
- 120 pounds (55 kg): 55 to 66 grams of protein per day
- 140 pounds (64 kg): 64 to 77 grams per day
- 160 pounds (73 kg): 73 to 87 grams per day
- 180 pounds (82 kg): 82 to 98 grams per day
If you’re recovering from surgery, managing a chronic condition like COPD or heart failure, or healing a pressure wound, your needs climb higher: 1.2 to 1.5 grams per kilogram. For a 150-pound woman, that’s roughly 82 to 102 grams per day. The elevated metabolism caused by inflammatory conditions burns through protein faster, making higher intake essential for recovery.
Why Protein Needs Increase With Age
After about age 30, your body gradually loses muscle mass. By your 70s, this process accelerates, and the body becomes less efficient at turning dietary protein into new muscle tissue. This age-related muscle loss, called sarcopenia, is a leading cause of falls, fractures, and loss of independence in older adults.
The 0.8 g/kg recommendation was originally calculated as the bare minimum to avoid deficiency and maintain basic function. It doesn’t account for the fact that older bodies need a stronger protein signal to build and maintain muscle. That’s why researchers now consider 1.0 to 1.2 g/kg the true minimum for healthy older adults, not a stretch goal.
Spreading Protein Across Meals Matters
Getting enough protein over the course of the day is important, but how you distribute it matters too. Older adults need roughly 25 to 30 grams of protein per meal to trigger muscle-building processes effectively. That threshold is higher than it is for younger people, whose muscles respond to smaller protein doses.
The key nutrient behind this threshold is leucine, an amino acid found in high-protein foods. International guidelines suggest older adults aim for about 3 grams of leucine at each of three daily meals. You don’t need to track leucine specifically. If you’re hitting 25 to 30 grams of protein at each meal from quality sources, you’re likely getting enough. The bigger issue for many older women is front-loading protein at dinner while eating very little at breakfast and lunch. A piece of toast with jam in the morning and a salad at lunch won’t get you there. Adding eggs, Greek yogurt, or cottage cheese to breakfast and including beans, chicken, or fish at lunch makes a real difference.
Best Protein Sources for Older Women
Animal-based proteins like eggs, poultry, fish, and dairy are the most efficiently absorbed and contain the full range of amino acids your muscles need. A 3-ounce serving of chicken breast provides about 26 grams of protein. A cup of Greek yogurt has around 15 to 20 grams. Two eggs provide roughly 12 grams.
Plant-based sources like beans, lentils, nuts, seeds, and soy products are also valuable, though they tend to be absorbed less completely and contain a less concentrated amino acid profile. If you eat mostly plant-based, combining different sources throughout the day (lentils with rice, tofu with whole grains) helps fill in the gaps. Soy-based foods like tofu and edamame are among the strongest plant options for muscle health.
If you struggle to eat enough protein from whole foods due to reduced appetite, dental issues, or other challenges, protein powders can help. Whey protein is particularly effective for building muscle in older adults, outperforming both plant-based and casein options in research. For those avoiding dairy, soy protein isolate is a reasonable alternative.
Signs You’re Not Getting Enough
Protein deficiency doesn’t always announce itself with obvious symptoms. Early signs can be subtle and easy to attribute to “just getting older.” Watch for unexplained muscle weakness or difficulty with tasks that used to feel easy, like getting up from a chair or carrying groceries. Frequent infections or slow wound healing can signal that your immune system isn’t getting the protein it needs to produce antibodies.
Skin and hair changes are another clue. Dry, pale skin and brittle hair that breaks easily can point to inadequate intake. In more advanced cases, you might notice swelling in the hands or legs, which happens when protein levels drop low enough that your body can’t properly balance fluids. Bone fractures from minor falls can also be connected to chronically low protein, since protein plays a direct role in maintaining bone density.
When Higher Protein Isn’t Appropriate
The one major exception to the “more is better” guidance is kidney disease. For people with reduced kidney function who are not on dialysis, a lower-protein diet is typically recommended because the kidneys have to work harder to process protein’s byproducts. The National Kidney Foundation advises working with a kidney dietitian to determine the right amount, since the target depends on the stage of kidney disease, your body size, and your nutritional status. If you have kidney disease or have been told your kidney function is declining, your protein target may be quite different from the general recommendations above.