Most nutrition authorities now recommend that a 65-year-old woman consume between 1.0 and 1.2 grams of protein per kilogram of body weight each day, with even higher amounts for those who exercise regularly or are recovering from illness. For a woman weighing around 68 kg (150 pounds), that translates to roughly 68 to 82 grams of protein daily. That figure is meaningfully higher than the long-standing U.S. Recommended Dietary Allowance of 0.8 g/kg, which was set for all adults and does not increase with age. The gap between the old guideline and newer expert recommendations reflects a growing body of research on how aging, and menopause in particular, changes the way the body handles protein.
Why the Standard 0.8 g/kg Recommendation Falls Short
The U.S. RDA of 0.8 g/kg/day was designed to prevent outright protein deficiency in healthy adults. It was not calibrated for preserving muscle, bone, or physical function in people over 65. After reviewing the evidence, an international expert panel recommended an average daily intake of 1.0 to 1.2 g/kg/day for adults aged 65 and older, and higher still for those who are exercising or otherwise active.1PubMed Central. Protein Requirements and Recommendations for Older People: A Review Australia’s dietary guidelines already distinguish between men and women and recommend a 25 percent increase in protein for adults over 70, while the U.S. and U.K. guidelines still treat a 25-year-old and a 75-year-old the same.
The reason the standard number is too low for older women comes down to a biological shift called anabolic resistance. Muscles in younger adults respond efficiently to protein and exercise by building new tissue. As people age, that response becomes blunted: the same meal that once triggered a strong muscle-building signal now produces a weaker one.2PubMed Central. Age-Related Anabolic Resistance: Nutritional and Exercise Strategies, and Potential Relevance to Life-Long Exercisers In practical terms, an older adult needs more protein to achieve the same muscle-maintenance benefit a younger person gets from less. And for women specifically, the picture is starker: research has found that postmenopausal women show greater anabolic resistance than older men, meaning their muscles are even less responsive to protein intake.3PubMed. Anabolic resistance: the effects of aging, sexual dimorphism, and immobilization on human muscle protein turnover
How Aging Changes Protein Digestion
Anabolic resistance is not the only barrier. The digestive system itself becomes less efficient at extracting amino acids from food. With age, digestive enzyme production from the pancreas drops, stomach emptying slows, and the transporter proteins that shuttle amino acids from the gut into the bloodstream and then into muscle tissue work less effectively.4PubMed. Aging influences protein digestion, absorption and amino acid metabolism The net result is that a smaller fraction of the protein you eat actually ends up available for muscle repair and other critical functions.
Research looking at what happens after a protein-rich meal confirms this in humans. Older adults show lower levels of ingested amino acids appearing in the bloodstream after eating, and a greater share of those amino acids gets trapped in the gut and liver rather than reaching the muscles.5PubMed. Impact of aging on the digestive system related to protein digestion in vivo This is part of why researchers keep arriving at the same conclusion: you need to eat more protein as you age just to maintain the same functional outcome.
Protein and Bone Health After Menopause
Muscle preservation gets most of the attention in protein discussions, but bone density is arguably just as important for women in their mid-sixties. The years after menopause bring accelerated bone loss, and protein plays a direct structural role in bone tissue. A large meta-analysis found that protein intakes above the standard RDA of 0.8 g/kg/day were associated with fewer hip fractures and slower bone mineral density loss.6PubMed Central. Impact of Dietary Protein on Osteoporosis Development Data from the Women’s Health Initiative, which followed roughly 140,000 women aged 50 to 79, showed that women in the higher protein intake group maintained greater total bone mineral density over time.
A study using NHANES data from over 10,000 adults found a positive association between protein intake and bone mineral density, with the relationship particularly clear in women. That study also identified a threshold effect: in women, the benefit leveled off at around 61 grams per day, suggesting that beyond a certain point, additional protein did not keep pushing bone density higher.7Scientific Reports. Association between dietary protein intake and bone mineral density based on NHANES 2011–2018 Separately, the Health, Aging, and Body Composition Study found that older adults in the highest protein intake group had hip and spine bone density roughly 2 to 6 percent higher than those eating the least protein, and a substantially lower risk of vertebral fracture over five years of follow-up.8The Journals of Gerontology: Series A. Effect of Dietary Protein Intake on Bone Mineral Density and Fracture Incidence in Older Adults in the Health, Aging, and Body Composition Study
For a 65-year-old woman, this means adequate protein is doing double duty: supporting the muscles that keep you steady on your feet and the bones that are less likely to fracture if you fall.
Exercise Makes Protein Work Harder
Eating enough protein matters, but combining it with resistance exercise amplifies the payoff. A large meta-analysis pooling data from 66 studies found that adding extra protein alongside resistance training led to measurable increases in lean body mass and lower-body strength.9PubMed Central. Systematic review and meta‐analysis of protein intake to support muscle mass and function in healthy adults The effects were modest in absolute terms, but for an older woman trying to preserve independence, even small gains in leg strength and muscle mass can mean the difference between climbing stairs comfortably and struggling with them.
A trial specifically in healthy older women compared four groups: exercise only, protein supplementation only, exercise plus protein, and a control group. The combination of exercise and protein produced the greatest gains in skeletal muscle mass, grip strength, and walking speed. Exercise alone outperformed protein alone for muscle mass, but the combination outperformed everything else.10PubMed. Effect of whey protein supplementation after resistance exercise on the muscle mass and physical function of healthy older women: A randomized controlled trial The takeaway is straightforward: protein without exercise helps some, exercise without enough protein helps some, but the two together produce the best results. If you are going to invest in one change, resistance exercise paired with adequate protein gets you the most return.
Animal Protein, Plant Protein, or Both
The source of your protein matters, though the picture is more nuanced than “animal is better.” Animal proteins from meat, fish, eggs, and dairy tend to have a more complete amino acid profile and higher bioavailability, meaning your body can use a greater proportion of what you eat.11PubMed Central. The effect of animal versus plant protein on muscle mass, muscle strength, physical performance and sarcopenia in adults: protocol for a systematic review For muscle maintenance specifically, this gives animal sources an edge gram for gram.
But the frailty data complicates the story in an interesting way. The Nurses’ Health Study, which followed a large cohort of older women, found that higher plant protein intake was associated with a lower risk of developing frailty, while higher animal protein intake was associated with a slightly increased risk. Replacing just 5 percent of energy from animal protein with plant protein was linked to a roughly 38 percent reduction in frailty risk.12PubMed Central. Protein intake and risk of frailty among older women in the Nurses’ Health Study A smaller Finnish study of older women found the opposite pattern, with higher animal protein linked to lower frailty prevalence.13PubMed Central. Higher protein intake is associated with a lower likelihood of frailty among older women, Kuopio OSTPRE-Fracture Prevention Study The disagreement likely reflects differences in what women were eating alongside the protein, how the studies measured frailty, and regional dietary patterns.
The practical lesson is that a mix of both sources is probably the safest bet. Animal proteins make it easier to hit your amino acid targets, especially for leucine, the amino acid most directly involved in triggering muscle protein synthesis. Research suggests that older adults have higher leucine requirements than current guidelines reflect.14PubMed Central. Dietary leucine requirement of older men and women is higher than current recommendations Dairy, eggs, chicken, and fish are particularly rich in leucine. Plant proteins from beans, lentils, tofu, and whole grains contribute fiber, micronutrients, and the frailty-protective benefits suggested by some observational data. You do not need to choose one camp.
Protecting Muscle When Losing Weight
Weight loss at 65 carries a particular risk that does not apply to younger adults in the same way. When you cut calories, you lose a mix of fat and muscle. In older women, losing muscle alongside fat can leave you weaker and more frail even at a lower body weight. The standard RDA of 0.8 g/kg appears inadequate during calorie restriction in older adults specifically because it does not protect lean tissue well enough.15PubMed Central. Optimal Protein Intake during Weight Loss Interventions in Older Adults with Obesity
In a trial of older women with obesity-related sarcopenia, those placed on a calorie-restricted diet with normal protein intake lost significant muscle mass. Women on the same calorie restriction but with higher protein intake actually gained muscle mass.16PubMed Central. Dietary protein intake in sarcopenic obese older women A separate study found that higher protein intake during calorie restriction helped older women maintain more muscle relative to the weight they lost, which in turn preserved physical function.17The Journals of Gerontology: Series A. The Effects of a Higher Protein Intake During Energy Restriction on Changes in Body Composition and Physical Function in Older Women If you are working on weight loss at this stage of life, making protein the priority macronutrient while cutting back on other calories is one of the more evidence-backed strategies available.
Does More Protein Hurt Your Kidneys
This is probably the most common worry people have about eating more protein, and it deserves a clear answer. In people with healthy kidneys, the evidence does not support the idea that higher protein intake causes kidney damage. One study comparing older adults (mainly women) with younger adults found that a high-protein diet did increase glomerular filtration rate in the older group, meaning the kidneys were working harder.18PubMed. Short-term exposure to a high-protein diet differentially affects glomerular filtration rate but not Acid-base balance in older compared to younger adults But an increase in filtration rate is not the same as kidney damage; it is a normal physiological response to higher protein loads. The kidneys are designed to ramp up when needed.
The caveat is real, though: if you already have chronic kidney disease, higher protein intake can accelerate its progression. The recommendations in this article assume normal kidney function. Anyone with known kidney problems should work with their doctor or a renal dietitian before increasing protein. For the majority of 65-year-old women with healthy kidneys, intakes in the 1.0 to 1.2 g/kg range are well within the range that research considers safe.
Signs You Might Not Be Getting Enough
Protein deficiency does not always announce itself with obvious symptoms. In older women, it often shows up as a gradual loss of function: difficulty carrying groceries, trouble getting up from a chair without using your arms, slower walking speed, declining grip strength. A large European study found that women aged 66 and older with the lowest protein intakes had significantly higher odds of difficulty with everyday tasks. Walking even 100 meters, stooping, kneeling, and shopping for groceries were all harder for women with low protein intake compared to those eating more.19PubMed Central. Low Protein Intake Is Associated with the Risk of Functional Impairment in Older Adults in an Age- and Gender-Specific Manner: A SHARE-Based Study Among women aged 50 to 65 in the same study, those with the lowest protein intake had more than double the odds of difficulty with toileting compared to women eating more protein.
Because the decline is gradual, many women attribute it to “just getting older” rather than recognizing that their diet may be a modifiable factor. If you notice you are losing strength or having more trouble with physical tasks than you did a year or two ago, protein intake is one of the first things worth evaluating.
Practical Ways to Reach Your Target
Knowing you should eat 1.0 to 1.2 g/kg of protein is one thing; consistently doing it is another. Appetite often declines with age, and protein-rich foods tend to be the most filling. Research confirms that protein-rich foods and supplements can suppress appetite in older adults, which creates a frustrating cycle: the more protein you eat at one meal, the less hungry you feel at the next.20Advances in Nutrition. The Impact of Protein Supplementation on Appetite and Energy Intake in Healthy Older Adults: A Systematic Review with Meta-Analysis
Spreading protein across three meals rather than loading it all into dinner can help. Each meal becomes a separate opportunity to trigger muscle protein synthesis, and smaller protein portions are easier to manage when appetite is low. If you are aiming for roughly 70 to 80 grams daily, that might look like 25 grams at each meal: two eggs and Greek yogurt at breakfast, a chicken salad at lunch, and fish with lentils at dinner, with a handful of nuts or a glass of milk as a snack.
A meta-analysis of whole-food interventions in community-dwelling older adults found that structured whole-food strategies (things like adding dairy at meals, incorporating protein-rich snacks, or receiving meal counseling) increased daily protein intake by about 12 grams per day on average compared to controls.21Oxford Academic (Nutritional Reviews). Effectiveness of Whole Food Interventions on Protein Intake in Community-Dwelling Older Adults: A Systematic Review and Meta-Analysis That is a meaningful bump, roughly the protein in two eggs, and it came from food rather than supplements. Supplemental protein powders or ready-to-drink shakes can fill gaps, but they are not necessary if you can reach your target with whole foods.
How Accurately Are You Tracking
If you are monitoring your protein intake using a food diary or tracking app, be aware that self-reported numbers tend to run a bit high. A study comparing food diaries against 24-hour urine collection (a more objective measure of how much protein the body actually processed) found that the diary method overestimated protein intake by about 8 grams per day.22PubMed Central. Estimating protein intake in sarcopenic older adults: combining food diaries and weighed powders versus 24-hour urine collections The correlation between the two methods was only moderate, meaning that day-to-day tracking was often off by a fair margin in either direction. That does not mean tracking is useless, but it is worth aiming slightly above your target to account for the typical gap between what the app says and what your body actually absorbed.
Protein and the Gut Microbiome
An emerging line of research connects protein intake in older adults to the composition of gut bacteria. A study of community-dwelling older men found that those with higher protein intake, whether from animal or plant sources, had greater diversity in their gut microbiome.23PubMed Central. Relation Between Dietary Protein Intake and Gut Microbiome Composition in Community-Dwelling Older Men: Findings from the Osteoporotic Fractures in Men Study (MrOS) Greater microbial diversity is generally associated with better metabolic health, better immune function, and lower inflammation. The study was conducted in men, so direct extrapolation to women is uncertain, but the relationship between dietary protein and gut health is an area worth watching. As more research focuses specifically on older women, this may become another reason the 0.8 g/kg standard looks increasingly outdated.