How much protein do women need after 40?
Protein needs are not magic after 40, but the stakes change. Preserving muscle becomes more important, and resistance training plus adequate protein is the center of the plan.
Clinical answer
Short answer
Many active women over 40 do well around 1.2–1.6 g/kg/day, adjusted for kidney disease, body size, appetite, training, and goals. Distribution across meals matters.
Who should consider it
Women in midlife, perimenopause/menopause, strength trainees, people losing weight, and anyone trying to preserve lean mass.
Who should skip or avoid it
People with significant kidney disease or medically restricted protein intake should personalize with their clinician. Also skip extreme protein targets that crowd out fiber and micronutrients.
What to measure before / after
Daily protein, meal distribution, strength, lean mass if available, appetite, GI tolerance, kidney function when relevant, and whether total diet quality remains high.
What I’d do first
Aim for a protein anchor at each meal, lift progressively, and use the lower end if smaller/sedentary and the higher end if training, dieting, or struggling to preserve muscle.
What would change my mind
I would shift targets based on better sex-specific trials tied to strength, function, bone, and metabolic outcomes—not just nitrogen balance.
The practical target
The RDA is a floor for deficiency prevention, not a personalized muscle-preservation target. For healthspan, I care more about whether protein plus training is preserving strength, function, and lean mass.
References & citations
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