Collagen peptides are just another name given to collagen molecules that have been broken down into smaller pieces, so collagen and collagen peptides are fundamentally the same things. Therefore, as mentioned above, collagen peptides can help the immune system. We believe the best collagen peptides are either marine collagen peptides or bovine collagen peptides. Both are equally effective, so your choice of which collagen peptide to take comes down to personal preference.