If you're a woman over 50 who's noticed increasing confusion about how much protein you should be consuming each day, whether you've come across advice claiming 50 grams is enough or others insisting on 150, you haven't been seeing things. How much protein do women over 50 need is a genuinely contested question, backed by real studies into how protein requirements change once women pass the 50-year mark. Here, we break down the details.
Reasons for Changes in Protein Needs After 50
From about the age of 30 onward, and more rapidly once you turn 50, your body undergoes the natural aging process of losing muscle tissue, a condition scientists call sarcopenia. This is a big part of why how much protein women over 50 need is different from what younger adults require. Your muscles also become less responsive to the protein you eat, a phenomenon called anabolic resistance, meaning the answer to how much protein women over 50 need isn't just "more," but a higher stimulus per meal to get the same repair effect your body once achieved with less.
Misconceptions in the Current RDA of Protein for This Age Group
The currently recommended dietary allowance (RDA) of protein in the United States is 0.8 grams per kilogram of body weight or around 46 grams per day in average women.¹ Based on Dr. Marily Oppezzo, a registered dietitian and director of the nutrition pillar of Stanford Lifestyle Medicine, this amount of daily protein was only established decades ago to avoid deficiencies in the whole population, but not to encourage healthy aging.² "There's a difference between just surviving and thriving," says Oppezzo. "For people over age 50, I would recommend 1.2 grams to 1.6 grams of protein per kilogram of body weight, which is double the government recommendation."²
What Is The Recommended Amount Of Protein For Women Over Age 50?
According to the latest research, the following is a real guide for you based on your activity level and goals:
Activity Level / Goal | Suggested Intake | Example (68 kg / 150 lb woman) |
|---|---|---|
RDA minimum (prevents deficiency only) | 0.8 g/kg | ~54 g/day |
Generally active, maintaining health | 1.0–1.2 g/kg | ~68–82 g/day |
Preventing muscle loss/sarcopenia | 1.2–1.6 g/kg | ~82–109 g/day |
Regular strength training or recovering from illness/surgery | Up to 1.6–2.0 g/kg | ~109–136 g/day |
Oppezzo mentions that there are some special cases when protein intake is higher in the range. These include competitive training in athletics, as well as recovery from illness, hospitalization, or surgery.² Oppezzo refers to the studies of Dr. Stuart M. Phillips, a professor of kinesiology at McMaster University, whose popular study in 2016 showed strong evidence of the importance of protein intake above RDA for healthy aging and prevention of muscle loss.³
Per-Meal Protein Count as Important as Daily Protein Count
An overlooked detail in this context: The protein intake doesn't just matter in terms of overall quantity, but also quantity per individual meal.
The 30-Gram Threshold
According to Oppezzo, the importance of per-meal protein count can be illustrated by studies showing the threshold quantity of protein required to stimulate muscle growth in one meal.² While a young individual of 25 years of age may be able to achieve such a result with an intake of 20 grams of protein, studies have shown that an older person will require close to 0.4 grams of protein per kilogram of body weight per meal.² For a 165-pound person, that would be about 30 grams.
Dietary Sources for a Given Day
Breakfast: Greek yogurt with nuts or eggs; target 25-30 grams
Lunch: Chicken, fish, tofu, or any legume-based foods; target 25-30 grams
Dinner: Any lean meats, fish, or combination of plant foods; target 25-30 grams
Protein Foods that Provide Best Quality Proteins to Women Over Age 50
Sources of Animal Origin (Higher in Leucine)
Eggs, chicken, fish, dairy, and red meat are considered more effective when it comes to activating muscle protein synthesis owing to leucine and improved digestibility; this notion is further backed by the studies done by the renowned protein researcher Dr. Donald Layman.⁴
Plant-Based Protein (More Planning Is Needed)
Beans, tofu, tempeh, lentils, and grains are great sources of protein, but they have lower amounts of leucine than meat and eggs. To compensate for it, if you follow a predominantly plant-based diet, try to combine different sources of protein during the day, eating grains along with legumes, and increase overall intake.⁴
Never Forget to Train Your Muscles
Many scientists, including Oppezzo, emphasize that proteins will not build up muscle without strength training because the body will use the consumed protein for any other purpose.² Two to three strength training sessions a week will significantly affect your muscles if there is enough protein in your diet.
Indicators That You Might Be Inadequate in Protein Intake
Visible decline in strength or muscle mass over time
Reduced recovery from physical exertion
Frequent feeling of hunger after eating
Frailness, poor balance, and tiredness
If you have noticed some of these signs, counting the number of grams of protein that you take over a couple of days may help you understand if you consume more or less than recommended by researchers.
Frequently Asked Questions
Is 46 grams enough, or how much protein do women over 50 need for healthy aging?
The RDA figure is a minimum to prevent deficiency, but researchers like Phillips and Oppezzo generally recommend 1.2–1.6 g/kg, meaningfully higher than that baseline for women over 50.² ³
Is it possible to obtain sufficient amounts of protein from plant sources only after 50?
It is possible with more deliberate planning; varying types of plant-based foods throughout the day and a little extra amount will compensate for their reduced amount of leucine content.⁴
Do changes in women due to menopause contribute to increased protein requirements?
The hormonal changes occurring during menopause result in faster muscle and bone mass loss. However, the need for higher protein consumption is associated with age-related anabolic resistance and not with menopause.²
What is the proper portion of protein consumption?
According to research, having about 25 to 30 grams of protein at once (about 0.4 g/kg of body weight) works better at stimulating muscle repair than having the same amount of protein either once or twice a day.²
Key Points
The takeaway is simple: the RDA of 0.8 g/kg was never meant to answer how much protein women over 50 need for healthy aging; it's a minimum designed only to prevent deficiency. A well-substantiated range of 1.2 to 1.6 g/kg is what researchers like Marily Oppezzo, Stuart Phillips, and Donald Layman actually recommend for this age group, spread across meals in doses of 25–30 grams and paired with regular strength training. Understanding how much protein women over 50 need doesn't require overhauling your entire diet just a bit more intention at each meal.
Sources & Research Cited
Institute of Medicine. Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. National Academies Press (2005). nap.edu
Oppezzo, M., PhD, MS, RDN. "Protein Needs for Adults 50+." Stanford Lifestyle Medicine (Stanford Prevention Research Center). lifestylemedicine.stanford.edu
Phillips, S. M., Chevalier, S., Leidy, H. J. "Protein 'requirements' beyond the RDA: implications for optimizing health." Applied Physiology, Nutrition, and Metabolism, 41(5), 565–572 (2016). PubMed: 26960445
Layman, D. K. "Impacts of protein quantity and distribution on body composition." Frontiers in Nutrition, 11:1388986 (2024). PubMed: 38765819
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