Findings from cell experiments and in vivo studies in rodents have enhanced our knowledge about how collagen peptides may contribute to a normal bone formation and an increase in bone mineral density if there is a lack in bone mass. First, it has been shown that collagen peptides are rapidly absorbed from the gastrointestinal tract. In addition, collagen peptides are largely absorbed in peptide form and may act as signaling molecules, thereby positively influencing anabolic processes. For connective tissue, in particular, this stimulating effect has previously been demonstrated. Therefore it may be assumed that the stimulation of collagen formation in bone could also be mediated via signaling proteins derived from collagen peptides.