Get your personalised daily protein target — adjusted for the hormonal and metabolic changes that happen after 40, whether your goal is building muscle, losing fat, or healthy aging.
Your Daily Protein Target
— – —
grams per day
—
g per kg body weight
—
g per meal (3 meals)
—
calories from protein
💡 Note for your life stage
Why protein needs increase after 40
After 40, several physiological shifts make protein more critical — and most women don't get enough. Understanding these changes explains why the standard RDA of 0.8g/kg is widely considered inadequate for this age group.
Sarcopenia: muscle loss with age
Starting in your 30s, muscle mass naturally declines at a rate of 3–8% per decade, accelerating after 60. This process — sarcopenia — directly affects metabolism, strength, and independence. Higher protein intake (combined with resistance training) is the single most effective way to slow it.
Anabolic resistance
Older muscles are less responsive to protein signals — a phenomenon called anabolic resistance. This means you need a higher dose of protein per meal (typically 30–40g rather than 20–25g) to trigger the same muscle-building response that younger people get from less.
Hormonal changes and menopause
The decline in estrogen during perimenopause and menopause accelerates muscle loss and makes it easier to gain body fat. Post-menopausal women have a particularly high need for dietary protein to counteract these hormonal effects on muscle tissue.
Recommended protein intake for women over 40
Most sports nutrition and gerontology research now recommends 1.2–1.6g of protein per kg of body weight for active women over 40, with some researchers suggesting up to 1.8–2.0g/kg for those doing regular resistance training or in post-menopause.
Spreading protein across the day
Due to anabolic resistance, women over 40 benefit from distributing protein evenly across 3–4 meals rather than eating most of it in one sitting. Aim for at least 30g per meal to maximise muscle protein synthesis at each eating occasion.
Frequently asked questions
Is 100g of protein a day enough for a woman over 40?
It depends on your weight and activity level. For a 65kg moderately active woman over 40, 100g/day (about 1.5g/kg) is a reasonable target. For heavier or more active women, or those focused on preserving muscle, 120–140g may be more appropriate. This calculator gives you a personalised estimate.
Should I eat more protein after menopause?
Yes. Post-menopausal women experience accelerated muscle loss due to the drop in estrogen, and research suggests protein needs increase further at this stage. Aiming for the higher end of the recommended range (1.5–2.0g/kg) is a well-supported approach for post-menopausal women, especially those doing resistance training.
Can too much protein damage kidneys?
For healthy women without pre-existing kidney disease, higher protein intakes (up to 2g/kg/day) are considered safe. The kidney concern largely applies to people with chronic kidney disease. If you have any kidney condition, consult your doctor before significantly increasing protein intake.
What are the best protein sources for women over 40?
Lean animal proteins (chicken, turkey, fish, eggs, Greek yogurt) provide complete amino acid profiles and are most efficiently used by muscle tissue. Plant proteins like legumes, tofu, and tempeh are also valuable but should be combined across the day to ensure all essential amino acids are covered. Prioritising leucine-rich sources (meat, dairy, eggs) supports muscle protein synthesis particularly well.
Does protein help with menopause weight gain?
Yes — higher protein intake supports fat loss during menopause through several mechanisms: it increases satiety (keeping you fuller longer), preserves muscle mass during a calorie deficit (muscle burns more calories at rest), and has a higher thermic effect than carbs or fat (meaning more calories are burned digesting it). Combined with resistance training, adequate protein is the most evidence-based approach to managing body composition changes during menopause.
Not medical advice. Protein recommendations are based on population-level research. Individual needs vary. If you have kidney disease, liver conditions, or other medical concerns, consult a healthcare professional before significantly changing your protein intake.