Collagen:

1.Czajka A, Kania EM, Genovese L, Corbo A, Merone G,Luci C, Sibilla S.Daily oral supplementation with collagen peptides combined with vitamins andother bioactive compounds improves skin elasticity and has a beneficial effecton joint and general wellbeing. Nutrition Research. 2018 Sep 1;57:97-108.​

2.Mödinger Y,Schön C, Vogel K, Brandt M, Bielfeldt S,Wilhelm KP. Evaluation of a Food Supplement with Collagen Hydrolysate andMicronutrients on Skin Appearance and Beauty Effects: A Randomized,Double-Blind, Placebo-Controlled Clinical Study with Healthy Subjects. J Clin CosmetDermatology. 2021;5(1):1-5.

​3.Borumand M, Sibilla S.Effects of a nutritional supplement containing collagen peptides on skinelasticity, hydration and wrinkles. Journal of Medical Nutrition andNutraceuticals. 2015 Jan 1;4(1):47.​

4.Hexsel D, Zague V, Schunck M, Siega C, Camozzato FO, Oesser S.Oral supplementation with specific bioactive collagen peptides improves nailgrowth and reduces symptoms of brittle nails. Journal of cosmetic dermatology.2017 Dec;16(4):520-6.​

5.Oesser S. The oral intake of specific bioactivecollagen peptides has a positive effect on hair thickness. InternationalJournal on Nutraceuticals, Functional Foods and Novel Foods. 2020.​

6.Zdzieblik D, Oesser S, Gollhofer A,König D. Improvement of activity-related knee joint discomfort followingsupplementation of specific collagen peptides. Applied Physiology, Nutrition,and Metabolism. 2017;42(6):588-95.​

7.Benito-Ruiz P, Camacho-Zambrano MM,Carrillo-Arcentales JN, Mestanza-PeraltaMA, Vallejo-Flores CA, Vargas-López SV, Villacís-TamayoRA, Zurita-GavilanesLA. A randomized controlled trial on the efficacy and safety of a foodingredient, collagen hydrolysate, for improving joint comfort. Internationaljournal of food sciences and nutrition. 2009 Jan 1;60(sup2):99-113.​

8.Kumar S, Sugihara F, Suzuki K, Inoue N, Venkateswarathirukumara S. Adouble‐blind, placebo‐controlled, randomised,clinical study on the effectiveness of collagen peptide on osteoarthritis.Journal of the Science of Food and Agriculture. 2015 Mar 15;95(4):702-7.​

9.Clifford T, Ventress M,Allerton DM, Stansfield S, Tang JC, Fraser WD, Vanhoecke B, Prawitt J,Stevenson E. The effects of collagen peptides on muscle damage, inflammationand bone turnover following exercise: a randomized, controlled trial. AminoAcids. 2019 Apr 1;51:691-704.​

10.Zdzieblik D, Oesser S, Baumstark MW, Gollhofer A,König D. Collagen peptide supplementation in combination with resistancetraining improves body composition and increases muscle strength in elderlysarcopenic men: a randomized controlled trial. British Journal of Nutrition.2015 Oct;114(8):1237-45.

​11.Shigemura Y, Suzuki A, Kurokawa M,Sato Y, Sato K. Changes in composition and content of food‐derived peptide inhuman blood after daily ingestion of collagen hydrolysate for 4 weeks. Journalof the Science of Food and Agriculture. 2018 Mar;98(5):1944-50.​

12.Clark KL, Sebastianelli W, Flechsenhar KR, Aukermann DF,Meza F, Millard RL, Deitch JR, Sherbondy PS,Albert A. 24-Week study on the use of collagen hydrolysate as a dietarysupplement in athletes with activity-related joint pain. Current medicalresearch and opinion. 2008 May 1;24(5):1485-96.​

13.Skov K, Oxfeldt M, Thøgersen R,Hansen M, Bertram HC. Enzymatic hydrolysis of a collagen hydrolysate enhancespostprandial absorption rate—a randomized controlled trial. Nutrients. 2019 May13;11(5):1064.​

Beauty5:

1.Hooper S, Hausenblas HA,Winters C. Efficacy of MitoHeal® supplementation on adult skin quality andpatient satisfaction: a randomized, double‐blind, placebo‐controlled, pilotstudy. Clinical and Experimental Dermatology. 2022 Dec 1;47(12):2269-72.​

2.Togni S, Maramaldi G,Conte C, Milano E, Giacomelli L.Photoprotective and antioxidant effects of a standardized olive (Olea europaea)extract in healthy volunteers. EsperienzeDermatol. 2015;17(4):143-8.​

3.Schulpis KH, Karikas GA, Tjamouranis J, Regoutas S,Tsakiris S. Low serum biotinidaseactivity in children with valproic acid monotherapy. Epilepsia.2001 Oct 29;42(10):1359-62.​

4.Colombo VE, Gerber F, Bronhofer M, Floersheim GL.Treatment of brittle fingernails and onychoschizia withbiotin: scanning electron microscopy. Journal of the American Academy ofDermatology. 1990 Dec 1;23(6):1127-32.

​5.Obied HK, Prenzler PD, Konczak I,Rehman AU, Robards K. Chemistry and bioactivity of olive biophenols insome antioxidant and antiproliferative in vitro bioassays. Chemical research intoxicology. 2009 Jan 19;22(1):227-34.

​6.Belcaro G, Ledda A,Hu S, Cesarone MR, Feragalli B, Dugall M.Grape seed procyanidins in pre-and mild hypertension: a registry study.Evidence-Based Complementary and Alternative Medicine. 2013 Jan 1;2013.​

7.Schön C, Allegrini P, Engelhart-Jentzsch K,Riva A, Petrangolini G.Grape seed extract positively modulates blood pressure and perceived stress: Arandomized, double-blind, placebo-controlled study in healthy volunteers.Nutrients. 2021 Feb 17;13(2):654.​

8.Richie JP, Nichenametla S, Neidig W, Calcagnotto A,Haley JS, Schell TD, Muscat JE. Randomized controlled trial of oral glutathionesupplementation on body stores of glutathione. European journal of nutrition.2015 Mar;54:251-63.

​9.Barbe A, Ramé C, Mellouk N,Estienne A, Bongrani A, Brossaud A,Riva A, Guérif F, Froment P,Dupont J. Effects of grape seed extract and proanthocyanidin B2 on in vitroproliferation, viability, steroidogenesis, oxidative stress, and cell signalingin human granulosa cells. International Journal of Molecular Sciences. 2019 Aug28;20(17):4215.​

10.Obied, H. K.; Prenzler, P.D.; Konczak, I.;Rehman, A. U.; Robards, K. Chemistry and Bioactivity of Olive Biophenols inSome Antioxidant and Antiproliferative in Vitro Bioassays. Chemical Research inToxicology. 2009; 22(1):227-234.​