Does fiber affect protein absorption?

Fiber can indeed affect protein absorption, especially in the context of plant-based proteins. When fiber is intrinsic to the plant, it can inhibit the absorption of the protein to a small degree. However, this inhibitory effect can be minimized through cooking processes like sprouting and fermentation, which make the plant proteins more digestible and closer in quality to animal proteins 1.

For example, if you eat raw peas, the fiber content may limit protein absorption more than if you consume cooked peas, which are more digestible. Generally, the overall impact of fiber on protein absorption isn't significant, especially if the foods are cooked properly 1.