Originally Posted by
canklecat
<snip> Usually I carry energy/protein bars, but there's a theory that whey protein (I can't handle vegan protein, too many digestion problems, so it has to be whey or meat) should be consumed within a fairly narrow window of metabolic opportunity, supposedly immediately after a hard workout. It's possible consuming too much protein during a ride might be somewhat detrimental, diverting metabolic energy toward digestion. So I'm going to try gels for a couple of weeks and see how it goes.<snip>
There's ~4 hour window for protein consumption. It's carbs that have the short windows after exercise. But I usually have them together after exercise.
True about the in-ride protein. About 15% is maybe optimal for 300k+ rides, but for shorter, plain carbs works best for the reason you give.