- Alcock, R. D., Shaw, G. C., & Burke, L. M. (2018). Bone Broth Unlikely to Provide Reliable Concentrations of Collagen Precursors Compared With Supplemental Sources of Collagen Used in Collagen Research. International Journal of Sport Nutrition and Exercise Metabolism, 1–8. https://doi.org/10.1123/ijsnem.2018-0139
- Borumand, M., & Sibilla, S. (2014). Daily consumption of the collagen supplement Pure Gold Collagen® reduces visible signs of aging. Clinical Interventions in Aging, 9, 1747–1758. https://doi.org/10.2147/CIA.S65939
- Clark, K. L., Sebastianelli, W., Flechsenhar, K. R., Aukermann, D. F., Meza, F., Millard, R. L., … Albert, A. (2008). 24-Week study on the use of collagen hydrolysate as a dietary supplement in athletes with activity-related joint pain. Current Medical Research and Opinion, 24(5), 1485–1496. https://doi.org/10.1185/030079908X291967
- Frasca, G., Cardile, V., Puglia, C., Bonina, C., & Bonina, F. (2012). Gelatin tannate reduces the proinflammatory effects of lipopolysaccharide in human intestinal epithelial cells. Clinical and Experimental Gastroenterology, 5, 61–67. https://doi.org/10.2147/CEG.S28792
- Kim, D.-U., Chung, H.-C., Choi, J., Sakai, Y., Lee, B.-Y., Kim, D.-U., … Lee, B.-Y. (2018). Oral Intake of Low-Molecular-Weight Collagen Peptide Improves Hydration, Elasticity, and Wrinkling in Human Skin: A Randomized, Double-Blind, Placebo-Controlled Study. Nutrients, 10(7), 826. https://doi.org/10.3390/nu10070826
- Odenwald, M. A., & Turner, J. R. (2017). The intestinal epithelial barrier: a therapeutic target? Nature Reviews Gastroenterology & Hepatology, 14(1), 9–21. https://doi.org/10.1038/nrgastro.2016.169
- Oesser, S., Adam, M., Babel, W., & Seifert, J. (1999). Oral Administration of 14C Labeled Gelatin Hydrolysate Leads to an Accumulation of Radioactivity in Cartilage of Mice (C57/BL). The Journal of Nutrition, 129(10), 1891–1895. https://doi.org/10.1093/jn/129.10.1891
- Osawa, Y., Mizushige, T., Jinno, S., Sugihara, F., Inoue, N., Tanaka, H., & Kabuyama, Y. (2018). Absorption and metabolism of orally administered collagen hydrolysates evaluated by the vascularly perfused rat intestine and liver in situ. Biomedical Research (Tokyo, Japan), 39(1), 1–11. https://doi.org/10.2220/biomedres.39.1
- Proksch, E., Segger, D., Degwert, J., Schunck, M., Zague, V., & Oesser, S. (2014). Oral Supplementation of Specific Collagen Peptides Has Beneficial Effects on Human Skin Physiology: A Double-Blind, Placebo-Controlled Study. Skin Pharmacology and Physiology, 27(1), 47–55. https://doi.org/10.1159/000351376
- Publishing, H. H. (n.d.). What’s the scoop on bone soup? Retrieved October 3, 2018, from https://www.health.harvard.edu/healthy-eating/whats-the-scoop-on-bone-soup
- Scaldaferri, F., Pizzoferrato, M., Gerardi, V., Lopetuso, L., & Gasbarrini, A. (2012). The Gut Barrier: New Acquisitions and Therapeutic Approaches. Journal of Clinical Gastroenterology, 46, S12. https://doi.org/10.1097/MCG.0b013e31826ae849
- Scott, A., & Nordin, C. (2016). Do Dietary Factors Influence Tendon Metabolism? In P. W. Ackermann & D. A. Hart (Eds.), Metabolic Influences on Risk for Tendon Disorders (pp. 283–289). Cham: Springer International Publishing. https://doi.org/10.1007/978-3-319-33943-6_27
- Shaw, G., Lee-Barthel, A., Ross, M. L., Wang, B., & Baar, K. (2017). Vitamin C–enriched gelatin supplementation before intermittent activity augments collagen synthesis. The American Journal of Clinical Nutrition, 105(1), 136–143. https://doi.org/10.3945/ajcn.116.138594
- Yamadera, W., Inagawa, K., Chiba, S., Bannai, M., Takahashi, M., & Nakayama, K. (2007). Glycine ingestion improves subjective sleep quality in human volunteers, correlating with polysomnographic changes. Sleep and Biological Rhythms, 5(2), 126–131. https://doi.org/10.1111/j.1479-8425.2007.00262.x