Do humans ingest protein through bacteria created in the gut, micro biome?

Humans do not directly ingest protein synthesized by gut bacteria, but the gut microbiome does play a role in synthesizing essential amino acids. According to Andrew Huberman and Diego Bohórquez, the microorganisms in our gut, known as the microbiome, can synthesize essential amino acids that are typically derived from animal proteins like meat, fish, and eggs. This synthesis can be triggered by the intake of dietary fiber, which can help compensate for the lack of animal protein in vegetarian or vegan diets, where individuals tend to consume more fiber 1.