Protein timing: what matters and what doesn't

For two decades, protein timing was sold as the difference between progress and waste. The evidence has settled somewhere much less dramatic, and the practical advice that comes out of it is simpler.

The hierarchy

In order of how much each thing affects the outcome:

1. Total daily protein. Everything else is a rounding error next to this.
2. Training that progresses. Protein without progressive overload builds very little.
3. Total calories. Muscle is easier to build at maintenance or above.
4. Distribution across the day. A real but modest refinement.
5. Timing relative to training. Smaller still, and mostly relevant at the edges.

Anyone worried about item five while missing item one is optimising in the wrong order.

What distribution actually does

Muscle protein synthesis rises after a protein-containing meal, peaks within a couple of hours, and returns to baseline — and it does so whether or not more protein arrives. The response to one very large serving is not proportionally larger than the response to a moderate one.

That is the argument for spreading protein: several moderate feedings produce a better summed response than one enormous one.

The practical version is three to five meals containing roughly 0.3 to 0.4 g per kilogram of bodyweight. For a 70 kg person, 21 to 28 g per meal across five, or 26 to 35 across four.

This is also just easier. Reaching 140 g across four meals is straightforward; reaching it across two is unpleasant.

The thirty-gram myth

The claim that the body "can only use 30 g of protein at a time" is a misreading of the studies on acute synthesis response.

What those studies show is that the muscle-building response plateaus at around 0.3 to 0.4 g per kilogram in a single meal. Protein above that is still digested and absorbed; it is simply used for other things — other tissues, or oxidised for energy.

Nothing is wasted in the sense of passing through unused. A 60 g protein meal is not a mistake, it is just not twice as anabolic as a 30 g one.

The post-workout window

The original claim was a thirty-minute window after training. The evidence points to a period of elevated sensitivity lasting many hours, likely a day or more in trained individuals.

Practical consequences:

If you ate a protein-containing meal within a few hours before training, there is no urgency afterwards. Amino acids from that meal are still circulating.

If you trained fasted, eating protein reasonably soon afterwards is sensible.

A shake right after training is convenient, which is a perfectly good reason to have one. It is not a requirement, which is the distinction drawn in is whey protein necessary, or just convenient.

Where timing genuinely matters

Three cases where it stops being a refinement.

Older adults. The muscle-building response to a given dose weakens with age, so both the per-meal amount and the daily total need to be higher — commonly 0.4 g per kilogram per meal rather than 0.3. See what changes about fat loss after 40.

Very long gaps. Sixteen hours without protein, whether from intermittent fasting or a busy day, means fewer opportunities to trigger the response. It is workable; it just requires larger servings in the remaining window.

High training volumes. Athletes training twice a day have recovery demands that make distribution more consequential.

Protein before bed

Reasonable, and for a straightforward reason: it adds a feeding, which helps people reach their daily total.

Slow-digesting protein suits the purpose — milk, curd, paneer, casein. Two hundred and fifty millilitres of milk before bed is 8 g of protein for 145 kcal and requires no preparation, which is why it appears in the list in hitting your protein without a single scoop.

What to actually do

Hit your daily total, which is set in how much protein do you actually need per day. Spread it across three to five meals because that is easier than not doing so. Eat protein sometime around training because you were going to eat anyway.

Then stop thinking about it and put the attention into the training, which is where the adaptation actually comes from — the subject of progressive overload, in numbers you can check.