A 63-year-old woman generally needs about 1.0 to 1.2 grams of protein per kilogram of body weight each day, which is meaningfully more than the standard recommendation most people have heard. For a woman weighing around 68 kg (150 lbs), that works out to roughly 68 to 82 grams of protein daily. The widely cited recommendation of 0.8 g/kg/day was set for all adults regardless of age, and a growing body of research suggests it falls short for people over 65, particularly women navigating the muscle and bone changes that come with menopause and aging.
Why the Standard Recommendation Falls Short
The Recommended Dietary Allowance for protein in the United States is 0.8 g/kg/day for all adults, with no upward adjustment for age. That number represents the minimum to prevent deficiency in most healthy people, not the amount needed to maintain muscle, strength, and physical function as you get older. An international expert panel known as the PROT-AGE study group reviewed the evidence and concluded that this recommendation is simply too low for older adults. They proposed a baseline of 1.0 to 1.2 g/kg/day for healthy people aged 65 and older, with even higher intakes for those who are physically active or dealing with acute or chronic illness.1Journal of the American Medical Directors Association. Evidence-Based Recommendations for Optimal Dietary Protein Intake in Older People: A Position Paper From the PROT-AGE Study Group
A separate review in the journal Nutrients echoed the same concern, noting that there is increasing evidence the current RDA of around 0.8 g/kg/day is insufficient to maintain muscle mass, strength, and function in older people.2PubMed Central. Protein Requirements and Recommendations for Older People: A Review At 63, you sit right at the edge of this older-adult bracket, and the physiological changes that drive higher protein needs are already well underway.
Anabolic Resistance and Aging Muscle
The reason older adults need more protein is not that protein becomes less important. It is that your muscles become less responsive to it. Researchers call this “anabolic resistance,” a term for the blunted ability of aging muscle to use dietary protein for building and repairing itself.3PubMed. Anabolic resistance of muscle protein synthesis with aging When a younger person eats a serving of chicken or eggs, their muscles respond with a robust burst of protein synthesis. In an older adult eating the same meal, that response is muted. The muscle “hears” the protein signal but reacts more sluggishly.
On top of this, the digestive system itself changes with age. Reduced secretion of stomach acid and digestive enzymes, slower intestinal transit, and decreased function of the transport proteins that shuttle amino acids from the gut into the bloodstream and muscles all combine to make the process less efficient.4PubMed. Aging influences protein digestion, absorption and amino acid metabolism Research has also shown that older adults have a delayed rise in essential amino acids after a high-protein mixed meal compared with younger adults, meaning the building blocks of protein show up in the blood more slowly.5The Journal of nutrition, health and aging. Older adults have delayed amino acid absorption after a high protein mixed breakfast meal Together, anabolic resistance and these digestive shifts mean you need to eat more protein to get the same muscle-building effect you would have gotten from less protein a decade or two ago.
The Estrogen Factor for Women
Women face an additional challenge that men of the same age do not. Estrogen plays a direct role in maintaining skeletal muscle, and its decline during and after menopause accelerates muscle loss. Evidence is accumulating that estrogen deficiency promotes cell death in skeletal muscle fibers, contributing to losses in both muscle mass and strength.6PubMed Central. Aging of the musculoskeletal system: How the loss of estrogen impacts muscle strength By age 63, most women are well past menopause, and this estrogen-driven muscle vulnerability has been operating for years. It does not mean the situation is irreversible, but it does mean that a 63-year-old woman’s protein needs are shaped by hormonal changes that a 63-year-old man has not experienced in the same way.
How Exercise Changes the Numbers
If you do resistance training, your protein needs may sit at the higher end of the 1.0 to 1.2 g/kg range or even slightly above it. A study of untrained older women who began a strength-training program found a positive relationship between daily protein intake and gains in skeletal muscle mass, with a breakpoint around 1.1 g/kg/day. Below that threshold, muscle gains were significantly smaller even when the women trained consistently.7PubMed. Is There a Minimum Protein Intake Associated With Resistance Training to Optimize Skeletal Muscle Mass Gains in Untrained Older Women?
A clinical trial comparing higher and lower protein intakes in older women doing resistance training makes this more tangible. The women eating more protein gained about 5.3% skeletal muscle mass over the study period, compared with only 1.3% in the lower-protein group. They also saw larger improvements in strength.8PubMed. Effects of higher habitual protein intake on resistance-training-induced changes in body composition and muscular strength in untrained older women: A clinical trial study Another trial found that older women combining higher protein with resistance training had greater improvements in skeletal muscle mass, body fat percentage, and metabolic health markers compared with those training on their usual diet.9PubMed. Effects of Protein Intake Beyond Habitual Intakes Associated With Resistance Training on Metabolic Syndrome-Related Parameters, Isokinetic Strength, and Body Composition in Older Women
The takeaway is not that protein alone builds muscle. Resistance training is the stronger stimulus. But protein gives your muscles the raw material to respond to that stimulus, and skimping on it measurably limits what your workouts can accomplish.
Spreading Protein Across Your Meals
How you distribute protein throughout the day matters, and this is where a lot of older adults run into trouble. A multinational study of older adults in the U.S., U.K., Germany, and Mexico found that the vast majority failed to reach even 30 grams of protein at breakfast, with over 90% of older adults across all four countries falling below that threshold at the morning meal.10PubMed Central. Dietary Protein Intake Patterns and Inadequate Protein Intake in Older Adults from Four Countries The typical pattern is a protein-light breakfast (toast, cereal, a piece of fruit), a moderate lunch, and most of the day’s protein crammed into dinner. This front-loading-at-dinner pattern is not ideal because your muscles can only use so much protein in one sitting for building and repair.
Aiming for roughly 25 to 30 grams at each of your three main meals tends to be a practical target. That same multinational study showed that when researchers assessed whether older adults hit even 0.4 g/kg per meal (roughly a third of the daily target), the vast majority fell short at breakfast and lunch. If you weigh 68 kg, 0.4 g/kg per meal comes out to about 27 grams, which is achievable but requires deliberate choices like eggs and Greek yogurt at breakfast rather than cereal alone.
Leucine and Protein Quality
Among the amino acids in protein, leucine plays an outsized role in triggering muscle protein synthesis, and this becomes especially relevant with age. Research has shown that in older adults, a standard mixture of essential amino acids may fail to stimulate muscle protein synthesis at all, while a leucine-enriched mixture succeeds.11PubMed. A high proportion of leucine is required for optimal stimulation of the rate of muscle protein synthesis by essential amino acids in the elderly A systematic review confirmed that leucine content appears to regulate the muscle-building response to ingested protein more strongly in older adults than in younger ones.12PubMed Central. Evaluating the Leucine Trigger Hypothesis to Explain the Post-prandial Regulation of Muscle Protein Synthesis in Young and Older Adults: A Systematic Review
This does not mean you need to buy leucine supplements. In fact, a controlled trial of pre-frail and frail older women who were already eating an optimized 1.2 g/kg/day of protein found that adding 7.5 grams of leucine per day on top of resistance training provided no additional benefit for muscle protein synthesis or muscle size compared with training alone.13PubMed Central. Resistance training, but not leucine, increased basal muscle protein synthesis and reversed frailty in older women consuming optimized protein intake The practical message: choose protein sources naturally rich in leucine (dairy, eggs, meat, fish, soy) rather than relying on isolated supplements, and prioritize resistance exercise, which did produce clear improvements in that same study.
Plant Versus Animal Protein
Plant proteins and animal proteins are not interchangeable gram for gram when it comes to stimulating muscle protein synthesis. Research comparing the two has found that plant-based proteins like soy and wheat produce a lower muscle-building response than animal-based proteins. Several factors contribute: plant proteins tend to be digested less completely, more of their amino acids get diverted to other organs before reaching the muscles, and most plant proteins contain less leucine.14The Journal of Nutrition. The Skeletal Muscle Anabolic Response to Plant- versus Animal-Based Protein Consumption A study comparing amino acid digestibility in young and older adults found that for some plant-based foods like sorghum, older adults absorbed about 19% less of certain amino acids than younger adults, while the difference was not significant for milk.15PubMed Central. Differences in amino acid digestibility between young and older adults: a randomized crossover study using the dual tracer method
None of this means plant-based diets cannot work for older women. It means you may need to eat somewhat more total protein if plants are your primary source, and you benefit from mixing complementary plant proteins (beans with grains, for example) to fill in amino acid gaps. Soy is the strongest plant contender since its leucine content and digestibility are closer to animal proteins than most other plant sources.
Protein and Bone Health
Bone density is a major concern for postmenopausal women, and protein intake connects to it in a way that is sometimes underappreciated. A study following elderly women found that those in the highest quartile of protein intake (averaging about 1.0 g/kg/day) had significantly higher bone mineral density in the spine, forearm, and total body compared with women in the lowest quartiles (around 0.84 g/kg/day). The difference at the spine was about 7%.16The American Journal of Clinical Nutrition. Protein intake: effects on bone mineral density and the rate of bone loss in elderly women This positive association held in women who also had adequate calcium intake, suggesting that protein and calcium work together rather than in opposition. An older myth that high protein leaches calcium from bones has largely been overturned by research showing that protein supports bone when calcium is sufficient.
Protecting Muscle During Weight Loss
If you are trying to lose weight at 63, protein becomes even more critical because caloric restriction tends to take muscle along with fat, a particularly dangerous trade-off in older adults who are already losing muscle from aging. A study in older women found that higher protein intake during energy restriction preserved muscle relative to total weight lost, which translated directly into better physical function.17PubMed. The effects of a higher protein intake during energy restriction on changes in body composition and physical function in older women
Research in postmenopausal women specifically has quantified this: women on a higher-protein diet lost roughly the same total weight as those on a lower-protein diet, but only about 16% of what the higher-protein group lost was lean mass, compared with nearly 38% for the lower-protein group.18The FASEB Journal. Dietary protein affects the composition of weight loss in post‐menopausal women Another trial found that higher protein intake also preserved satiety better during caloric restriction, making the diet easier to sustain.19PubMed. Higher protein intake preserves lean mass and satiety with weight loss in pre-obese and obese women If you are cutting calories, keeping protein high is one of the most effective strategies for ensuring you lose the right kind of weight.
Sarcopenia and Frailty Prevention
Sarcopenia, the progressive loss of muscle mass and function with age, is one of the strongest predictors of disability and loss of independence in older adults. A meta-analysis found that older adults with sarcopenia consumed significantly less protein than those without it.20PubMed Central. Protein Intake and Sarcopenia in Older Adults: A Systematic Review and Meta-Analysis The relationship between protein and frailty has also been studied directly. In the Women’s Health Initiative, a large observational study following tens of thousands of women, every 20% increase in protein intake as a share of total calories was associated with roughly a 32% lower risk of becoming frail.21PubMed Central. Protein Intake and Incident Frailty in the Women’s Health Initiative Observational Study These are observational associations, not proof that protein alone prevents frailty, but the pattern is consistent and the magnitude is large enough to take seriously.
When More Protein Is Not Better
There is one important caveat to the “eat more protein” message. If you have existing kidney disease or significantly impaired kidney function, higher protein intake may accelerate kidney damage. High dietary protein can increase the pressure inside the kidney’s filtering units, potentially leading to injury over time.22PubMed Central. The Effects of High-Protein Diets on Kidney Health and Longevity For women with healthy kidneys, the 1.0 to 1.2 g/kg range recommended by the PROT-AGE group is well within safe limits. But if you have been told your kidney function is reduced, or if your blood work has flagged elevated creatinine or low GFR, talk to your doctor before increasing protein. The recommendation for kidney patients often stays closer to 0.6 to 0.8 g/kg or is individually tailored by a nephrologist.
How Many Older Adults Actually Fall Short
If you suspect you might not be eating enough protein, you are in good company. The multinational study cited earlier found that about 43% of older adults in the U.S. failed to meet even the standard 0.8 g/kg/day recommendation. When measured against the higher 1.0 g/kg target, roughly 62% of U.S. older adults fell short. And when assessed against the 1.2 g/kg target that many researchers now recommend for active older adults, the shortfall was even more striking, ranging from about 66% to 84% across the countries studied.10PubMed Central. Dietary Protein Intake Patterns and Inadequate Protein Intake in Older Adults from Four Countries The problem is not that people are unaware protein matters. It is that reaching 1.0 to 1.2 g/kg/day requires more deliberate meal planning than most people realize, especially if appetite is declining or budgets are tight.
A Bedtime Protein Strategy
An emerging approach that may help older adults close their protein gap is eating protein before bed. A review of the research found that protein consumed before sleep is effectively digested and absorbed during the overnight hours, and it increases muscle protein synthesis rates while you sleep. Researchers have specifically proposed pre-sleep protein as a strategy to help preserve muscle in the elderly, particularly when combined with physical activity.23PubMed Central. The Impact of Pre-sleep Protein Ingestion on the Skeletal Muscle Adaptive Response to Exercise in Humans: An Update In practice, this could mean a small serving of cottage cheese, a glass of milk, or a casein-based shake in the evening. It is not a magic bullet, but for someone who struggles to fit enough protein into three meals, an evening snack built around protein can help fill the gap without requiring larger meals.
The Cost Question
One underappreciated barrier to eating more protein is cost. A study evaluating the cost-effectiveness of protein-rich diets for older adults found that daily food costs for a protein-optimized diet averaged about €8.35 per day, compared with roughly €5.65 for a control diet. That is about a 48% increase in daily food spending.24PubMed Central. Cost-effectiveness of protein-rich meals and snacks for increasing protein intake in older adults For older women on fixed incomes, this is not trivial. The same study found, however, that strategically adding protein-rich meals and snacks was more cost-effective than simply increasing portions of normal food. Eggs, canned fish, dried lentils, milk, and cottage cheese tend to be among the most affordable ways to boost protein. Whey protein powder, while it may feel like a supplement-aisle luxury, often costs less per gram of protein than fresh meat or fish and can be stirred into oatmeal or blended into smoothies.
Whole-food sources of protein also offer something that isolated powders do not. Researchers have pointed out that the food matrix surrounding protein in whole foods, including fats, micronutrients, and other bioactive compounds, can modulate how that protein is used by the body.25PubMed Central. Food-First Approach to Enhance the Regulation of Post-exercise Skeletal Muscle Protein Synthesis and Remodeling A glass of milk is not just protein; it delivers calcium, vitamin D (if fortified), and a combination of whey and casein that may support both rapid and sustained amino acid delivery. Supplements have their place as a convenience tool, but whole foods should carry most of the load when possible.