broscience on nutrient absorption: since evolution is adaption, I’d say carnivores and omnivores, take lions and cavemen, didn’t eat 5 x 40g of protein a day but filled up on it on after a successful hunt (though some smaller predatory canivores store some of their catch away) and so our guts have adapted to be able to absorb large amounts of calories/nutrients at once as this is hugely beneficial to survival.
there’s various studies on meal frequencies and metabolism/weight/muscle gain, finding none or little differences between 2 - 6 meals a day - in fact, eating too frequently (in intervals smaller than 3h) was said to impact absorption negatively.
now your digestive enzyme population does adapt to your regular diet as well, which means sudden overeating on protein or fat may require more protease/lipase etc. than is available currently, giving you the shits - I did the carnivore diet half a year ago, eating 500g+ protein and 200g fats a day which was a horrible first week of runny shits but once my gut had adapted, everything normalized.