Per meal and timing

How many meals should I split my protein into?

By GyroscopeUpdated November 14, 20265 sources

Three or four meals, each at your meal line, about 0.4 g per kg of body weight. In a 2013 lab study, the same 80 g of protein built the most muscle protein over 12 hours as four 20 g doses, more than eight 10 g doses or two 40 g doses. If you eat twice a day, make both meals big. Bigger meals aren’t wasted.

Two habits pull people away from this. Some graze, with a handful of nuts here, a latte there and a protein bar at 3 pm, which adds up but never adds much at once. Others eat almost nothing until dinner and then have one huge plate. Both can hit a daily number, and both leave most meals well under the amount that does the most work.

We’d split the day into three meals that each clear your line, or four if you’re big or lifting hard. A snack can add grams, but we wouldn’t count on 10 g snacks to do the job of a meal.

Grazing on 10 g snacks is like watering a garden with a spray bottle. It’s water, and you can do it all day, but a proper soak a few times a day does more.

The study behind three or four

In 2013, José Areta and colleagues had 24 trained young men do a heavy leg workout and then drink the same 80 g of whey over 12 hours, in one of three patterns. They measured how fast new muscle protein was built in the leg.

That’s a clear result, with limits. It measured building in the lab over 12 hours, and muscle size over months could differ. It used one leg exercise and whey only. And 80 g in 12 hours is less than most people eat in a day.

A 2018 paper by Brad Schoenfeld and Alan Aragon pulled the studies together and suggested about 0.4 g per kg at each of at least four meals for people trying to build muscle. That’s where our meal line comes from, together with the per-meal figures for older and younger men from Moore 2015.

And if you eat two big meals?

That works better than the 2013 study suggests. In a 2023 trial, 100 g of milk protein after a whole-body workout kept muscle building going for more than 12 hours, longer and stronger than 25 g. The workout and the dose were both bigger than in 2013, which may be why. A 2022 trial in adults aged 65 to 80 found no difference over three days between an evenly spread day and one with 60% of the protein at dinner.

We’d put the total first, then keep meals from falling far under the line. Three or four meals is the easy way to get both, and two big meals is fine if that’s how you live. See protein in an 8-hour eating window.

What three meals look like at 180 lb

Grams from USDA FoodData Central. Test your own meals in the meal line calculator, or tap through the quiz to see how many of your meals clear the line.