Why the standard number is too low for women at midlife
The general adult reference intake of roughly 0.8 grams per kilogram of body weight was set to prevent deficiency, not to preserve muscle. For a woman in her fifties those are different goals, and the second one needs more.
Ranges around 1.2 to 1.6 grams per kilogram are commonly used to support muscle retention after menopause. For a woman of 70 kilograms that is roughly 84 to 112 grams a day, against about 56 grams under the deficiency-prevention figure.
Anabolic resistance: why the target rises with age
Older muscle responds less efficiently to a given dose of protein. The same 20 grams that triggered a solid muscle-building response at 30 produces less at 60, a phenomenon described as anabolic resistance. More protein is needed to reach the same effect, which is why the requirement rises at exactly the age most people assume it should fall.
This compounds with the loss of estrogen, which itself contributes to the accelerated decline in muscle mass across the menopause transition. Protein alone does not fix that; it works alongside resistance training, which supplies the stimulus the protein then supports.
Distribution matters as much as the total
Roughly 25 to 30 grams per meal is the commonly suggested pattern, because one large serving at dinner is a weaker stimulus than the same total spread across the day. Breakfast is where most women fall short, often by a wide margin: a bowl of cereal or a slice of toast typically delivers under 10 grams.
Practical ways to close a breakfast gap: Greek yogurt, eggs, cottage cheese, or adding a protein source to whatever you already eat rather than replacing the meal.
Protein while losing weight
This is where the number matters most. Weight lost in a calorie deficit comes partly from muscle unless protein and resistance training protect it, and muscle lost at this stage of life is difficult to regain. That is also why very low-calorie approaches tend to leave people with a lower resting metabolic rate than they started with.
The same logic applies on GLP-1 medication, where appetite falls sharply and total intake can drop below what muscle needs without anyone noticing. Our page on GLP-1 and bone density covers the parallel concern for the skeleton.
Does high protein harm the kidneys?
In people with healthy kidneys, intake within these ranges has not been shown to cause damage. It does modestly raise measured creatinine, which matters mainly because it can trigger an unnecessary kidney work-up. Our page on creatinine and eGFR explains why, and it is worth mentioning your intake before anyone investigates a borderline result.
If you have established kidney disease, protein intake is a conversation with your clinician rather than something to set from a calculator.