Key takeaways
- A reasonable protein range for most women over 40 is 1.2–1.6 g per kg of body weight a day, rising to 1.6–2.2 g/kg when eating in a calorie deficit or strength training.
- For a 65 kg (143 lb) woman that is roughly 78–104 g a day for general health and 104–143 g when dieting or lifting.
- Muscle responds less to small protein doses with age, so aiming for 25–40 g at each of three or four meals works better than one large dinner.
- Protein alone does not hold muscle: two to three resistance sessions a week are what give the extra protein something to do.
- The usual gap is at breakfast: many women reach 15–20 g by midday, so fixing the first meal is the cheapest change.
Most women over 40 do well on about 1.2–1.6 grams of protein per kilogram of body weight a day, and on 1.6–2.2 g/kg if they are losing weight or strength training. That is noticeably above the 0.8 g/kg minimum, and it matters more with age because muscle becomes less responsive to protein and hormonal changes around menopause make holding on to lean mass harder.
How much protein do women over 40 need per day?
Women over 40 are best served by 1.2–1.6 g of protein per kg of body weight daily for general health, and 1.6–2.2 g/kg when in a calorie deficit or following a strength program. These ranges are the same ones used for younger adults in our full protein-per-day guide; the difference at 40-plus is that the lower end is a floor to stay above, not a number to aim under.
The official 0.8 g/kg figure is set to prevent deficiency in healthy adults. It is not designed to preserve muscle during a diet or to offset age-related loss, which is why most sports-nutrition and ageing-research groups recommend more.
| Body weight | General health (1.2–1.6 g/kg) | Dieting or lifting (1.6–2.2 g/kg) |
|---|---|---|
| 55 kg (121 lb) | 66–88 g | 88–121 g |
| 65 kg (143 lb) | 78–104 g | 104–143 g |
| 75 kg (165 lb) | 90–120 g | 120–165 g |
| 85 kg (187 lb) | 102–136 g | 136–187 g |
Daily grams of protein, calculated from the g/kg ranges. If you carry a lot of extra weight, many dietitians base the target on a goal or healthy weight instead; the TDEE and macro calculators below let you set that.
To turn a gram target into a full macro split, use the free macro calculator or the walkthrough in how to calculate your macros.
Why does protein matter more after 40?
Protein matters more after 40 because skeletal muscle gradually declines with age and needs a larger protein signal to be maintained. Population studies commonly describe muscle mass falling by several percent per decade from midlife if it is not strength-trained, and the loss is faster after menopause.
Two mechanisms are usually cited. The first is anabolic resistance: older muscle shows a smaller muscle-building response to the same dose of protein, so a bigger dose per meal, roughly 25–40 g, is needed to produce a comparable response. The second is the fall in oestrogen through perimenopause and menopause, which is associated with a shift in body composition toward less lean mass and more abdominal fat even when weight on the scale barely changes.
Neither mechanism is a reason for alarm. Both are blunted by the same two levers: enough protein, and resistance training. Why preserving muscle matters while eating less is covered in more depth in our post on muscle loss during rapid weight loss.
1.2–1.6 g/kg
General health
daily protein for most adult women over 40
1.6–2.2 g/kg
Deficit or training
daily protein when losing weight or lifting
25–40 g
Per meal
across three to four meals
Does menopause change how much protein you need?
Menopause does not have its own official protein target, but the lean-mass loss that accompanies it is a good reason to stay in the upper half of the general range. Falling oestrogen is linked to a faster decline in muscle and bone, and protein supports both: it supplies the amino acids for muscle and contributes to the structural matrix of bone.
Calorie needs also tend to drift lower with age, partly because of less muscle and often less daily movement, so protein takes up a larger share of a smaller budget. Re-check your numbers every few months with the TDEE calculator rather than assuming your target from your thirties still fits; what TDEE is explains what moves it.
Check with your clinician
If you have kidney disease, are on hormone therapy or any medication that affects appetite or weight, or have a bone or metabolic condition, ask your doctor or a registered dietitian before raising your protein intake. The ranges here are for healthy adults and are educational, not individual medical advice.
See your protein as you eat it
Snap a photo of a meal and 2BIB's AI scanner returns calories and macros, with protein tracked against a daily target based on your weight and goal. It makes the first-meal gap visible without a food scale.
How should women over 40 spread protein through the day?
Spreading protein across three or four meals at 25–40 g each is a better pattern than eating most of it at dinner. Because the muscle response to a meal plateaus, extra protein in one sitting is used less efficiently than the same total split over the day.
The most common shortfall is breakfast. Toast, cereal, or fruit with coffee often delivers under 10 g, while a typical lunch and dinner lift the day only partway. The fix is rarely a supplement; it is a protein anchor at the first meal.
- Breakfast: three eggs, or 200 g of Greek yoghurt with a handful of nuts, lands around 20–25 g; adding cottage cheese or a protein shake pushes it to 30 g or more.
- Lunch and dinner: a palm-sized portion of chicken, fish, tofu or lean beef typically gives 25–35 g; add beans or lentils for the remainder.
- Snacks: a snack with 10–15 g, such as skyr, edamame or jerky, closes the gap if you only eat two main meals.
For specific foods and gram counts per serving, see our list of high-protein foods.
Does protein work without strength training?
Protein on its own slows muscle loss less than protein combined with resistance training. Lifting provides the mechanical signal that tells muscle to retain and build tissue, and protein provides the raw material. Research on older adults finds the combination outperforms either alone.
Two to three full-body sessions a week using weights, bands or heavy bodyweight movements is a common, sustainable starting point. The build muscle guide covers calorie and protein setup for training, and the lose weight guide shows how to keep protein high while eating in a deficit.
The short version
For most women over 40, a daily target of 1.2–1.6 g/kg, or 1.6–2.2 g/kg when dieting or lifting, divided into 25–40 g servings, gives the best chance of keeping muscle as hormones and activity change. Fix breakfast first, add two or three strength sessions a week, and check your target against your current weight every few months.