Can your body only use 30 g of protein at once?

No. Your body digests and uses all the protein you eat. 25 to 30 g a meal is a target for spreading protein well, not a limit.

Does protein timing matter?

Some, perhaps. Expert groups say the evidence is not yet strong enough for firm rules, so get your daily total right first.

How much protein should you eat per meal after 40?

Updated 29 October 2026

About 25 to 30 g of protein at each meal is the amount researchers have proposed to make the most of each meal for muscle in older adults. Spreading your daily protein across three or four meals, rather than one big dinner, is the usual advice. The evidence on timing is still limited, so your daily total matters most.

Where 25 to 30 g comes from

Paddon-Jones and Rasmussen (2009) proposed 25 to 30 g of high-quality protein per meal as a way to get the most muscle building from each meal without eating much more overall. Many people eat little protein at breakfast and most of it at dinner.

The PROT-AGE group noted that timing and protein quality may matter, but that the evidence was not yet strong enough for firm rules. So aim for the daily total first, then spread it.

What 25 to 30 g looks like

Rather than give numbers per food that vary by brand and portion, check labels on the foods you eat often. Most meals reach the target when they are built around a clear protein food such as fish, eggs, meat, tofu, beans or lentils, with yoghurt or milk on the side. The Eatwell Guide groups these foods together.

Breakfast is often the gap. Eggs, Greek-style yoghurt or beans on toast help close it.
If your daily target is high, a fourth meal or snack makes it easier.
The protein calculator splits your daily target into meals for you.

Know your starting point: work out your daily protein with the protein calculator and check your strength with the home strength test.

Questions people also ask

Can your body only use 30 g of protein at once?: No. Your body digests and uses all the protein you eat. 25 to 30 g a meal is a target for spreading protein well, not a limit.
Does protein timing matter?: Some, perhaps. Expert groups say the evidence is not yet strong enough for firm rules, so get your daily total right first.

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Ojafi gives general food and exercise guidance. It is not medical advice and does not diagnose or treat any condition. See our medical disclaimer.