Casein Question

With one serving, say it has 26g protien, and is to digest over 7 hours. Per the label

So say if you took half a serving. 13g of protien

Would it digest the 13g of protien over 7 hours, or would it take half the time?

protein absorption in the gut varies wildly from food to food, egg whites / whey have a high bioavailability and a quick absorption rate, fish > white meat > red meat > casein proteins etc

youre looking at it the wrong way, digestion is very complex and their are many factors that influence the rate of protein absorption in the gut and the rate of clearing food from your gut

fats slow digestion, mixing macronutrients slightly slows digestion, fibre tends to slow digestion (large amounts of insoluble fiber can cause excessive chelation and quicker passing of digested food)



digestion rate DOES NOT EQUAL protein absorption rate (wanted to make this clear)

Casein proteins do take longer to assimilate, at any given point in time your body is synthesizing proteins at a certain rate, the amount of protein in the gut should be thought of as a reservoir, not a leaking sack, in the sense that that protein youve consumed WILL be used (up to a certain point), lets say you consume 100g of casein, the digestion rate will be slowed vs 1 scoop of casein as you have consumed MORE calories in a meal, another factor that can slow digestion.

so to sum up your question, it depends, is your body synthesizing protein at a rate of nearly 2g per hour? im not certain but i believe the number is higher than this, ESPECIALLY after a workout.

Id recommend 1-2 scoops of casein, not half.

[QUOTE=VesperT01;1600357671]With one serving, say it has 26g protien, and is to digest over 7 hours. Per the label

So say if you took half a serving. 13g of protien

Would it digest the 13g of protien over 7 hours, or would it take half the time?[/QUOTE]

I know it's 6 months later now but yes, that will work as a rough proxy if you're taking it on an empty stomach.

But why are you worried about digestion time? You shouldn't be taking 13 grams of protein in a serving because it's not enough to robustly stimulate MPS.

Make sure to get at least 25 grams.

No IMO.
Same amount of time but other factors could change it depending on what else you take in and when you do it.
Taking in casein before bed would be a slower intake and while active may assimilate faster.

Protein absorption rate is typically measured in gram per hour. This largely means taking half the amount would absorb roughly twice as fast.

For example:
[quote]Whey is a “fast-acting” protein; its absorption rate has been estimated at ~ 10 g per hour [5]. At this rate, it would take just 2 h to fully absorb a 20-g dose of whey. While the rapid availability of AA will tend to spike MPS, earlier research examining whole body protein kinetics showed that concomitant oxidation of some of the AA may result in a lower net protein balance when compared to a protein source that is absorbed at a slower rate [10]. For example, cooked egg protein has an absorption rate of ~ 3 g per hour [5], meaning complete absorption of an omelet containing the same 20 g of protein would take approximately 7 h, which may help attenuate oxidation of AA and thus promote greater whole-body net positive protein balance. An important caveat is that these findings are specific to whole body protein balance; the extent to which this reflects skeletal muscle protein balance remains unclear.[/quote]
[url]https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5828430/[/url]

Absorption rate for casein is about 6 grams per hour.