Abridged Bibliography of Studies on Collagen Peptides

(1) Dubourg,G.,(2013).Targeting bone health. The world of food ingredients, February 2013.

(2) Kim, H.K., Kim, M.G. and Leem, K.H. (2013). Osteogenic activity of collagen peptide via ERK/MAPK pathway mediated boosting of collagen synthesis and its therapeutic efficacy in osteoporotic bone by back-scattered electron imaging and microarchitecture analysis. Molecules, Vol. 18, 15474-15489.

(3) Leem, K.H., Lee, S., Jang, A. and Kim, H.K. (2013). Porcine skin gelatin hydrolysate promotes longitudinal bone growth in adolescent rats. Journal of Medicinal Food, Vol. 16, Iss. 5, 447-453.

(4) Kim, H.K., Kim, M.G. and Leem, K.H. (2014). Collagen hydrolysates increased osteogenic gene expressions via a MAPK signaling pathway in MG-63 human osteoblasts. Food & Function, Vol. 5, Iss. 3, 573-578.

(5) JunLi Liu, Bing Zhang, ShuJun Song, Ming Ma, ShaoYan Si, YiHu Wang, BingXin Xu, Kai Feng, JiGong Wu and YanChuan Guo. (2014). Bovine collagen peptides compounds promote the proliferation and differentiation of MC3T3-E1 pre-osteoblasts, Vol.9, Iss. 6, 1-6.

(6) Adam, M., Spacek, P., Hulejova, H., Galianova, A. and Blahos, J. (1996). Postmenopausal osteoporosis. Treatment with calcitonin and a diet rich in collagen peptides. Casopis Lékaru Ceských, Vol. 135, Iss. 3, 74-78.

(7) Martin-Bautista, E., Martin-Matillas, M., Martin-Lagos, J.A., Miranda-Leon, M.T., Muñoz-Torres, M., Ruiz-Requena, E., Rivero, M., Quer, J., Puigdueta, I., and Campoy, C. (2011). A nutritional intervention study with hydrolyzed collagen in pre-pubertal spanish children: influence on bone modeling biomarkers. Journal of Pediatric Endocrinology and Metabolism, Vol. 24, Iss. 3-4,147-153.

(8) Trč, T. and Bohmová, J. (2011). Efficacy and tolerance of enzymatic hydrolysed collagen (EHC) vs. glucosamine sulphate (GS) in the treatment of knee osteoarthritis (KOA). International Orthopaedics, Vol. 35, Iss. 3, 341-348.

(9) Benito-Ruiz, P., Camacho-Zambrano, M.M., Carrillo-Arcentales, J.N., Mestanza-Peralta, M.A., Vallejo-Flores, C.A., Vargas-López, S.V., Villacís-Tamayo, R.A. and Zurita-Gavilanes, L.A. (2009). A randomized controlled trial on the efficacy and safety of a food ingredient, collagen hydrolysate, for improving joint comfort. International Journal of Food Sciences and Nutrition, Vol. 60, Iss. 1, 99-113.

(10) Clark, K.L., Sebastianelli, W., Flechsenhar, K.R., Aukermann, D.F., Meza, F., Millard, R.L., Deitch, J.R., Sherbondy, P.S., and 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 Opinions, Vol. 24, Iss. 5, 1485-1496.

(11) Schunck, M., Schulze, C.H. and Oesser, S. (2006). Disparate efficacy of collagen hydrolysate and glucosamine on the extracellular matrix metabolism of articular chondrocytes. Osteoarthritis and Cartilage, Vol. 14, Suppl. 114, 199.

(12) Knox NutraJoint, (2000). New study shows gelatine supplementation may help improve knee function in people with mild osetoarthritis. Partner in motion.

(13) F.Guillerminet, H. Beaupied, V. Fabien-Soulé, D.Tomé, C-L. Benhamou, C. Roux, A. Blais. (2010). Collagen peptides improve bone metabolism and biomechanical parameters in ovariectomized mice: an in vitro and in vivo study. Bone 46 (3): 827-834.

(14) T.E. McAlindon, M. Nuite, N.Krishnan, R. Ruthazer, L.L. Price, D. Bursteien, J. Griffith, K. Flechsenhar. (2011). Change in knee osteoarthritis cartilage detected by delayed gadolinium enhanced magnetic resonance imaging following treatment with collagen hydrolysate: a pilot randomized controlled trial OARSI - ICRS Volume 19, Issue 4.

(15) F.Guillerminet,V. Fabien-Soulé,P.C. Even, D.Tomé, C-L. Benhamou, C. Roux, A. Blais. (2012). Hydrolyzed collagen improves bone status and prevents bone loss in ovariectomized C3H/HeN mice. Osteoporosis International 23 (7): 1909-1919.

(16) M. Schunck, S. Oesser. (2013). Specific collagen peptides benefit the biosynthesis of matrix molecules of tendons and ligaments. Journal  of the International Society of Sports Nutrition 10 (Suppl 1).

(17) J.X. Jiang,S. Yu, Q.R. Huang, X.L Zhang, C.Q. Zhang, J.L Zhou, J. Prawitt .(2014). Collagen peptides improve knee osteoarthritis in elderly women. Agro Food Industry Hi Tech 25 (2): 19-23.

(18) Igase M, Kohara K, Okada Y, Ochi M, Igase K, Inoue N, Kutsuna T, Miura H, Ohyagi Y. A double-blind, placebo-controlled, randomised clinical study of the effect of pork collagen peptide supplementation on atherosclerosis in healthy older individuals. Biosci Biotechnol Biochem. (2018) ;82(5):893-895. doi: 10.1080/09168451.2018.1434406. Epub 2018 Feb 15. PMID: 29447076.

(19) Kumar S, Sugihara F, Suzuki K, Inoue N, Venkateswarathirukumara S. A double-blind, placebo-controlled, randomised, clinical study on the effectiveness of collagen peptide on osteoarthritis. J Sci Food Agric. (2015) Mar 15;95(4):702-7. doi: 10.1002/jsfa.6752. Epub 2014 Jun 24. PMID: 24852756.

(20) Soniwala, S. et al. (2018). Oral Hydrolyzed Type 2 Collagen Protects Against the OA of Obesity and Mitigates Obese Gut Microbiome Dysbiosis. Poster presentation at ORS 2018 and OARSI 2018. 

(21) Daneault, A. et al. (2014) Hydrolyzed collagen contributes to osteoblast differentiation in vitro and subsequent bone health in vivo. Osteoarthritis and Cartilage, 22:S131. 

(22) Wauquier, F. et al. (2019). Human Enriched Serum Following Hydrolysed Collagen Absorption Modulates Bone Cell Activity: from Bedside to Bench and Vice Versa. Nutrients 11: 1249.

(23) Daneault, A. et al., (2017). Biological effect of hydrolyzed collagen on bone metabolism. Critical Reviews in Food Science and Nutrition, 57(9):1922-1937.

(24) Jimi, S., Koizumi, S., Sato, K. et al. (2021) Collagen-derived dipeptide Pro-Hyp administration accelerates muscle regenerative healing accompanied by less scarring after wounding on the abdominal wall in mice. Sci Rep 11, 18750.

(25) Shiro JIMI, Arman SAPAROV, Seiko KOIZUMI, Motoyasu MIYAZAKI, Satoshi TAKAGI. (2021) A novel mouse wound model for scar tissue formation in abdominal muscle wall. Journal of Veterinary Medical Science, Volume 83, Issue 12, Pages 1933-1942.

(26) Bruyère O, Zegels B, Leonori L, Rabenda V, Janssen A, Bourges C, Reginster JY. (2012). Effect of collagen hydrolysate in articular pain: A 6-month randomized, double- blind, placebo controlled study. Complementary Therapies in Medicine 20 (3): 124-30. 

(27) Dar Q-A, Schott EM, Catheline SE, Maynard RD, Liu Z, Kamal F, Farnsworth CW, Ketz JP, Mooney RA, Hilton MJ, Jonason JH, Prawitt J, Zuscik MJ (2017). Daily oral consumption of hydrolyzed type 1 collagen is chondroprotective and anti-inflammatory in murine posttraumatic osteoarthritis.  PLoS ONE 12 (4): e0174705.

(28) Ohara H, Iida H, Ito K, Takeuchi Y, Nomura Y. (2010). Effects of pro-hyp, a collagen hydrolysate-derived peptide, on hyaluronic acid synthesis using in vitro cultured synovium cells and oral ingestion of collagen hydrolysates in a guinea pig model of osteoarthritis. Biosciences, Biotechnology and Biochemistry 74 (10): 2096-2099. 

(29) Newman C, Adriaens E,Virgilio N, Vleminckx S, de Pelsmaeker S; Prawitt J; Silva CIF. Development of a mobile application to monitor the effectiveness of a hydrolyzed cartilage matrix supplement on joint discomfort: a real-life study. Accepted for publication in JMIR Formative Research, in press.  

(30) Tyree M, S. et al. (2021). A Randomized, double-blind, placebo-controlled study trial to evaluate the potential effects of Naticol®, fish collagen peptides on symptoms of sarcopenia in the elderly. JOJ Case Study.

(31) Isaka S, Someya A, Nakamura S, Naito K, Nozawa M, Inoue N, Sugihara F, Nagaoka I and Kaneko K (2017). Evaluation of the effect of oral administration of collagen peptides on an experimental rat osteoarthritis model. EXPERIMENTAL AND THERAPEUTIC MEDICINE 13: 2699-2706.

(32) Kviatkovsky, S. A., R. C. Hickner, H. E. Cabre, S. D. Small and M. J. Ormsbee (2023). Collagen peptides supplementation improves function, pain, and physical and mental outcomes in active adults. J Int Soc Sports Nutr 20(1): 690-707.

(33) Kviatkovsky, S. A., R. C. Hickner and M. J. Ormsbee (2022). Collagen peptide supplementation for pain and function: is it effective? Curr Opin Clin Nutr Metab Care 25(6): 401-406.

(34) Zdzieblik D., Brame J., Oesser S., Gollhofer A., König D. (2021). The Influence of Specific Bioactive Collagen Peptides on Knee Joint Discomfort in Young Physically Active Adults: A Randomized Controlled Trial. Nutrients 2021 Feb; 13(2): 523.

(35) Zdzieblik D., Oesser S., Gollhofer A., König D. (2017). Improvement of activity-related knee joint discomfort following supplementation of specific collagen peptides. Applied Physiology, Nutrition, and Metabolism 24 January 2017. 

(36) Gonçalves FK. (2017). Impact of collagen hydrolysate in middle-aged athletes with knee and ankle osteochondral lesions: A case series. Int J Case Rep Images 2017. 8(6):364–369.

(37) Knefeli H-K., Mueller-Autz M. (2018). Improved bone healing after oral application of specific bioactive collagen peptides. Nutrafoods (2018) 17:185-188. 

(38) Koenig D., Oesser S., Scharla S., Zdzieblik D.,Gollhofer A. (2018). Specific Collagen Peptides Improve Bone Mineral Density and Bone Markers in Postmenopausal Women—A Randomized Controlled Study. Nutrients 2018, 10(1), 97.

(39) Argyrou C., Karlafti E., Lampropoulou-Adamidou K., Tournis S., Makris K., Trovas G., Dontas I., Triantafyllopoulos I. K. (2020). Effect of calcium and vitamin D supplementation with and without collagen peptides on bone turnover in postmenopausal women with osteopenia. J Musculoskelet Neuronal Interact. 2020 Mar 3;20(1):12-17.

(40) Zdzieblik D., Oesser S., Koenig D. (2021) Specific Bioactive Collagen Peptides in Osteopenia and Osteoporosis: Long-Term Observation in Postmenopausal Women. Journal of Bone Metabolism 2021;28(3): 207-213.

(41) Lampropoulou-Adamidou K., Karlafti E., Argyrou C., Makris K.,Trovas G., Dontas I.A., Tournis S., Triantafyllopoulos I.K. (2022) Effect of Calcium and Vitamin D Supplementation With and Without Collagen Peptides on Volumetric and Areal Bone Mineral Density, Bone Geometry and Bone Turnover in Postmenopausal Women With Osteopenia. Journal of Clinical Densitometry. 25 (3). July–September 2022. 357-372.

(1) V. Zague. (2008). A new view concerning the effects of collagen hdyrolysate intake on skin properties. Arch Dermatol Res.

(2) V. Zague, V. de Freitas, M. da Cosat Rosa, G. Alvares de Castro, R. G. Jaeger, G. M.Machado-Santelli. (2010). Collagen Hydrolysate Intake Increases Skin Collagen Expression and Suppresses Matrix Mettaloproteinase 2 Activity

(3) Proksch, E., Schunck, M., Zague, V., Segger, D., Degwert, J. and Oesser, S. (2014). Oral intake of specific bioactive collagen peptides reduces skin wrinkles and increases dermal matrix synthesis. Skin Pharmacol. Physiol., Vol 27, Iss. 3, 113-119.

(4) Choi, S.Y., Ko, E.J., Lee, Y.H., Kim, B.G., Shin, H.J., Seo, D.B., Lee, S.J., Kim, B.J. and Kim, M.N. (2013). Effects of collagen tripeptide supplement on skin properties: A prospective, randomized, controlled study. Journal of Cosmetic and Laser Therapy – online ahead of print.

(5) Kantor, I., Donikyan, L.A., Simon, E. And Wollschlaeger, B. (2002). Results of a study evaluating the use of a dietary supplement formula in the management of age-related skin changes in women with moderate to severe wrinkling of the periorbital area. The Journal of the American Nutraceutical Association, Vol. 5, Iss. 2, 10-19.

(6) Proksch, E., Segger, D., Degwert, J., Schunck, M., Zague, V. and Oesser, S. (2014). Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology: a double-blind, placebo-controlled study. Skin Pharmacol. Physiol., Vol. 27, Iss. 1, 47-55.

(7) Ohara, H., Ito, K., Iida, H. And Matsumoto, H. (2009). Improvement in the moisture content of the stratum corneum following 4 weeks of collagen hydrolysate ingestion. Nippon Shokuhin Kagaku Kogaku Kaishi (J. Soc. Food Sci. Technol.) Vol. 56, Iss. 3, 137-145.

(8) Inoue N, Sugihara F, Wang X. Ingestion of bioactive collagen hydrolysates enhance facial skin moisture and elasticity and reduce facial ageing signs in a randomised double-blind placebo-controlled clinical study. J Sci Food Agric. (2016);96(12):4077-81. doi: 10.1002/jsfa.7606. Epub 2016 Feb 10. PMID:

(9) Asserin, J. et al. (2015). The effect of oral collagen peptide supplementation on skin moisture and the dermal collagen network: evidence from an ex vivo model and randomized, placebo-controlled clinical trials. Journal of Cosmetic Dermatology, doi: 10.1111/jocd.12174. 

(10) Borumand, M. et al. (2014). Daily consumption of the collagen supplement Pure Gold Collagen® reduces visible signs of aging, Clinical Interventions in Aging. Clinical study done by Minerva in UK, 9:1747-1758.

(11) Edgar, S. et al. (2018). Effects of collagen-derived bioactive peptides and natural antioxidant compounds on proliferation and matrix protein synthesis by cultured normal human dermal fibroblasts. Clinical study done by Minerva in UK, Scientific Reports |8:10474 | DOI:10.1038/s41598-018-28492-w.

(12) Czajka. A. et al. (2018). Daily oral supplementation with collagen peptides combined with vitamins and other bioactive compounds improves skin elasticity and has a beneficial effect on joint and general wellbeing. Clinical study done by Minerva in UK, N U T R I T I O N R E S E A R C H 5 7 ( 2 0 1 8 ) 9 7 – 108.

(13) Slowing down the clock with collagen peptides. Cosmetics Business white paper, January 2021 issue.

(14) Asai TT, Oikawa F, Yoshikawa K, Inoue N, Sato K. (2020) Food-Derived Collagen Peptides, Prolyl-Hydroxyproline (Pro-Hyp), and Hydroxyprolyl-Glycine (Hyp-Gly) Enhance Growth of Primary Cultured Mouse Skin Fibroblast Using Fetal Bovine Serum Free from Hydroxyprolyl Peptide. International Journal of Molecular Sciences. 2020; 21(1):229.

(15) Edgar S, Hopley B, Genovese L, Sibilla S, Laight D, Shute J. (2018). Effects of collagen-derived bioactive peptides and natural antioxidant compounds on proliferation and matrix protein synthesis by cultured normal human dermal fibroblasts. Scientific reports 8(1): 10474.

(16) 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.

(17) Campos PM, Melo MO, Calixto LS, Fossa MM (2015). An oral supplementation based on hydrolyzed collagen and vitamins improves skin elasticity and dermis echogenicity: a clinical placebo-controlled study. Clinical Pharmacology & Biopharmaceutics 4 (3): 142.

(18) Tanaka M, Koyama YI, Nomura Y (2009). Effects of collagen peptide ingestion on UV-B-induced skin damage. Biosciences, Biotechnology and Biochemistry 73 (4): 930-932.

(19) Jung K, Kim S-H, Joo K-M, Lim S-H, Shin J-H, Roh J, Kim E, Park CW, Kim W. (2021). Oral Intake of Enzymatically Decomposed AP Collagen Peptides Improves Skin Moisture and Ceramide and Natural Moisturizing Factor Contents in the Stratum Corneum. Nutrients. 2021; 13(12):4372.

(20) Campos PMBGM, Melo MO, Shirata MMF, Leite MG (2022). Oral intake of Bioactive Collagen Peptides in the improvement of skin and hair: clinical studies by instrumental measurements. Biopharmaceutical Sciences, Biomed Biopharm Res., 2022; 19(2):379-496.

(21) Duteil, L. et al. (2016). Specific natural bioactive type 1 collagen peptides oral intake reserve skin aging signs in mature women. J Aging Res Clin Practice 2016;5(2):84-92.

(22) Duteil, L. et al. (2018). Effect of low dose type 1 fish collagen peptides combined or not with silicon on skin aging signs in mature women. JOJ Case Study 6(4) JOJCS.MS.ID.555692

(23) Evans, M et al. (2020). A randomized, triple-blind, placebo-controlled, parallel study to evaluate the efficacy of a freshwater marine collagen on skin wrinkles and elasticity. J Cosmet Dermatol.; 20(3):825-834.

(24) Sugihara F, Inoue N, Wang X (2015). Clinical effects of ingesting collagen hydrolysate on facial skin properties: -A randomized, placebo-controlled, double-blind trial-. Japanese pharmacology and Therapeutics. 43:67-70.

(25) Koizumi S, Inoue N, Shimizu M, Chang-ju Kwon, Hwa-young Kim, Kyoung Sik Park (2017). Effects of Dietary Supplementation with Fish Scales-Derived Collagen Peptides on Skin Parameters and Condition: A Randomized, Placebo-Controlled, Double-Blind Study. International Journal of Peptide Research and Therapeutics, 1-6.

(26) Himeno, A., Tsujikami, M., Koizumi, S., Watanabe, T., & Igase, M. (2022). Effect of Reducing Pigmentation by Collagen Peptide Intake: A Randomized, Double-Blind, Placebo-Controlled Study. Dermatology and therapy. 2022 Jul;12(7):1577-1587.

(27) Schunck M., Zague V., Oesser S., Proksch E. (2015). Dietary Supplementation with Specific Collagen Peptides Has a Body Mass Index-Dependent Beneficial Effect on Cellulite Morphology. J Med Food, September 2015. 1340-1348.

(28) Proksch E, Schunck M., Oesser S. (2020). Positive effect of fish-derived Bioactive Collagen Peptideson skin health. Nutrafoods 2020 1: 127-133.

(29) Hexsel D., Zague V., Schunck M., Siega C., Camozzato, F.O., Oesser, S. (2018). Oral supplementation with specific bioactive collagen peptides improves nail growth and reduces symptoms of brittle nails. Journal of Cosmetic Dermatology, July 2017.

(30) Oesser S. (2020). The oral intake of specific Bioactive Collagen Peptides has a positive effect on hair thickness. Nutrafoods (2020) 1: 134-138.

(1) Melvin W. (2005). Dietary Supplements and Sports Performance: Amino Acids. Journal of the International Society of Sports Nutrition. 2: p63-67. 

(2) Newholme.E and Co. (1992). Physical and mental fatigue: Metabolic mechanisms and importance of plasma amino acids. British Medical Bulletin, 48: 477-95. 

(3) Matsumoto Keitaro and Co. (2008). Branched-Chain Amino acid supplementation increases the lactate threshold during an incremental exercise test in trained individuals. J Nutr Sci Vitaminol.55.p52-58. 

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(10) Kjaer M and Co. (2005). Metabolic activity and collagen turnover in human tendon in response to physical activity. J Musculosketet neuronal Interact.5: 41-52. 

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(12) Miller B.F and Co. (2005). Coordinated collagen and muscle protein synthesis in human patella tendon and quadriceps muscle after exercise. J Physiol.567 (3). 1021-1033. 

(13) Clark, K.L. and Co. (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 Opinions, 24 (5): 1485-1496.

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(15) Krieger W James and Co.(2006). Effects of variation in protein and carbohydrate intake on body mass and composition during energy restriction: a meta-regression. Am J Clin Nutr.83:260.74. 

(16) Layman K Donald and Co.(2007). Dietary protein and exercise have additive effects on body composition during weight loss in adult women. Journal of Nutrition. 1903-1910. 

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(18) Pupovac J and Co. (2002). Dietary peptides induce satiety via cholecystokinin-A and peripheral pioid receptors in rats. The Journal of Nutrition.132: 2775-2780. 

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(23) Van Loon Luc JC and Co. (2000). Ingestion of protein hydrolysate and amino acid-carbohydrate mixtures increases postexercise plasma insulin responses in men. American Society of Nutritional Sciences. p2508-2513. 

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(25) Herregods Griet. (2011). Activity andpurification of ACE inhibitor peptides from animal by-products: in vitro and in vivo evaluation. PhD thesis. Ghent University, Ghent, Belgium. 

(26) Herregods Griet and Co. (2011). Angiotensin I-converting enzyme inhibitor activity of gelatin hydrolysates and identification of bioactive peptides. Journal of agricultural and food chemistry. 59 (2): 552-8. 

(27) Clifford, T, et al. (2019): The effects of collagen peptides on muscle damage, inflammation and bone turnover following exercise: a randomized, controlled trial. Amino Acids - https://doi.org/10.1007/s00726-019-02706-5. 

(28) Osawa, Y., Nomura, K., Kimira, Y. et al. (2021) Monitoring urinary collagen metabolite changes following collagen peptide ingestion and physical activity using ELISA with anti active collagen oligopeptide antibody. Sci Rep 11, 13527 (2021).

(29) Taylor, G., Leonard, A., Tang, J.C.Y. et al. (2023). The effects of collagen peptides on exercise-induced gastrointestinal stress: a randomized, controlled trial. Eur J Nutr 62, 1027–1039. 

(30) Thomas, C., Kingshott, R.N., Allott, K.M. et al. (2023). Collagen peptide supplementation before bedtime reduces sleep fragmentation and improves cognitive function in physically active males with sleep complaints. Eur J Nutr. 

(31) Holwerda, A. M. and L. J. C. van Loon (2021). The impact of collagen protein ingestion on musculoskeletal connective tissue remodeling: a narrative review. Nutrition Reviews, Volume 80, Issue 6, June 2022, Pages 1497–1514.

(32) Praet SFE, Purdam CR, Welvaert M, Vlahovich N, Lovell G, Burke LM, Gaida JE, Manzanero S, Hughes D, Waddington G. (2019). Oral Supplementation of Specific Collagen Peptides Combined with Calf-Strengthening Exercises Enhances Function and Reduces Pain in Achilles Tendinopathy Patients. Nutrients. 2019 Jan 2; 11(1):76.

(33) Jerger S., Centner C., Lauber B., Seynnes O., Sohnius T., Jendricke P., Oesser S., Gollhofer A., König D. (2022). Effects of specific collagen peptide supplementation combined with resistance training on Achilles tendon properties. Scand J Med Sci Sports. 2022. 32:1131–1141.

(34) Jerger S., Centner C., Laubera B., Seynnes O., Friedrich T., Lolli D., Gollhofer A., Koenig D. (2023). Specific collagen peptides increase adaptions of patellar tendon morphology following 14-weeks of high-load resistance training: A randomized-controlled trial. European Journal of Sport Science, 23:12, 2329-2339.

(35) Jendricke P, Kohl J, Centner C, Gollhofer A, Koenig D. (2020). Influence of Specific Collagen Peptides and Concurrent Training on Cardiometabolic Parameters and Performance Indices in Women: A Randomized Controlled Trial. Front Nutr. 2020 Nov 19;7:580918.

(36) Jerger, S., Jendricke, P., Centner, C. et al. (2023). Effects of Specific Bioactive Collagen Peptides in Combination with Concurrent Training on Running Performance and Indicators of Endurance Capacity in Men: A Randomized Controlled Trial. Sports Med - Open 9, 103 (2023).

(37) Bischof K, Stafilidis S, Bundschuh L, Oesser S, Baca A, Koenig D. (2023). Influence of specific collagen peptides and 12-week concurrent training on recovery-related biomechanical characteristics following exercise-induced muscle damage-A randomized controlled trial. Front Nutr. 2023 Nov 16;10:1266056. 

(38) Zdzieblik D, Oesser S, Baumstark MW, Gollhofer A, Koenig D. (2015). Collagen peptide supplementation in combination with resistance training improves body composition and increases muscle strength in elderly sarcopenic men: a randomised controlled trial. Br J Nutr. 2015 Oct 28;114(8):1237-45.

(39) Jendricke P, Centner C, Zdzieblik D, Gollhofer A, Koenig D. (2019). Specific Collagen Peptides in Combination with Resistance Training Improve Body Composition and Regional Muscle Strength in Premenopausal Women: A Randomized Controlled Trial. Nutrients. 2019 Apr 20;11(4):892.

(40) Kirmse M, Oertzen-Hagemann V, de Marées M, Bloch W, Platen P. (2019). Prolonged Collagen Peptide Supplementation and Resistance Exercise Training Affects Body Composition in Recreationally Active Men. Nutrients. 2019 May 23;11(5):1154.

(41) Oertzen-Hagemann V, Kirmse M, Eggers B, Pfeiffer K, Marcus K, de Marées M, Platen P. Effects of 12 Weeks of Hypertrophy Resistance Exercise Training Combined with Collagen Peptide Supplementation on the Skeletal Muscle Proteome in Recreationally Active Men. Nutrients. 2019 May 14;11(5):1072.

(42) Zdzieblik D, Jendricke P, Oesser S, Gollhofer A, Koenig D. (2021). The Influence of Specific Bioactive Collagen Peptides on Body Composition and Muscle Strength in Middle-Aged, Untrained Men: A Randomized Controlled Trial. Int J Environ Res Public Health. 2021 Apr 30;18(9):4837.

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