How Much Protein Do You Really Need After 40?
The official minimum was set to prevent deficiency, not to protect aging muscle. Experts on aging recommend more, spread across your meals.
Key takeaways
- The RDA of 0.8 g of protein per kilogram of body weight is a minimum, not an optimum.
- An international expert group recommends 1.0–1.2 g/kg a day for adults over 65, and more for those who are ill.
- Spreading protein across meals and pairing it with strength training helps preserve muscle.
- People with kidney disease should get individual guidance.
Muscle is metabolic, protective tissue. It stores glucose, supports your joints and bones, and is a strong predictor of independence later in life. From middle age on, people gradually lose muscle mass and strength, a process that accelerates after 60. When it becomes severe it is called sarcopenia. Protein intake is one of the two big levers you control. The other is resistance exercise.
What the numbers say
The Recommended Dietary Allowance for adults is 0.8 grams of protein per kilogram of body weight per day. That figure was designed to prevent deficiency in most healthy people, not to maximize muscle as you age.
The PROT-AGE study group, an international panel of geriatric and nutrition experts, concluded that adults over 65 should aim for 1.0 to 1.2 g/kg a day, and 1.2 to 1.5 g/kg for those with acute or chronic illness. For a 75 kg (165 lb) person, that’s roughly 75 to 90 grams a day. Many experts apply similar targets from midlife onward, particularly for people who are trying to lose weight, since dieting increases the risk of losing muscle.
Timing helps
Older muscle responds less efficiently to protein, a phenomenon called anabolic resistance. Rather than eating most of your protein at dinner, aim for roughly 25 to 30 grams at each main meal. Breakfast is the meal most people come up short on.
Easy ways to get there
- Greek yogurt or cottage cheese: about 15–20 g per cup-sized serving.
- Eggs: about 6 g each.
- Chicken, fish, lean meat or tofu: roughly 20–30 g per palm-sized portion.
- Beans and lentils: about 15–18 g per cooked cup, plus fiber.
- Protein powder can fill gaps; choose products with third-party testing.
Pair it with lifting
Protein alone won’t build muscle. Resistance training two or more days a week is what tells your body to use it. This is especially important for anyone taking GLP-1 weight-loss medications, where lean mass loss is a concern.
Who should be careful
If you have chronic kidney disease, higher protein intake may not be appropriate; talk to your nephrologist or a registered dietitian about a target that’s right for you.
Frequently asked questions
How much protein should a 60-year-old eat?
Many experts recommend about 1.0 to 1.2 grams per kilogram of body weight per day for older adults, higher than the 0.8 g/kg RDA, unless kidney disease or another condition calls for less.
Is too much protein bad for your kidneys?
For people with healthy kidneys, moderately higher protein intakes appear safe. People with chronic kidney disease should follow individual medical advice.
Does protein timing matter?
Spreading protein across meals, about 25 to 30 grams each, appears more effective for older muscle than eating most of it in one meal.