"There is virtually no absorption of peptides longer than four amino acids." "Lactoferrin—also known as lactotransferrin—is comprised of 692 amino acids folded

"There is virtually no absorption of peptides longer than four amino acids." "Lactoferrin—also known as lactotransferrin—is comprised of 692 amino acids folded into two globular lobes that are connected by an α–helix" -- https://www.mdpi.com/1422-0067/18/4/870/htm https://www.mdpi.com/1422-0067/18/4/870/htm So any effect would be mediated by the microbiome, which doesn't require absorption.