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 and
other bioactive compounds improves skin elasticity and has a beneficial effect
on 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 and
Micronutrients on Skin Appearance and Beauty Effects: A Randomized,
Double-Blind, Placebo-Controlled Clinical Study with Healthy Subjects. J Clin Cosmet
Dermatology. 2021;5(1):1-5.​

3.Borumand M, Sibilla S.
Effects of a nutritional supplement containing collagen peptides on skin
elasticity, hydration and wrinkles. Journal of Medical Nutrition and
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4.Hexsel D, Zague V, Schunck M, Siega C, Camozzato FO, Oesser S.
Oral supplementation with specific bioactive collagen peptides improves nail
growth and reduces symptoms of brittle nails. Journal of cosmetic dermatology.
2017 Dec;16(4):520-6.​

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

6.Zdzieblik D, Oesser S, Gollhofer A,
König D. Improvement of activity-related knee joint discomfort following
supplementation 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-Peralta
MA, Vallejo-Flores CA, Vargas-López SV, Villacís-Tamayo
RA, Zurita-Gavilanes
LA. 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. 2009 Jan 1;60(sup2):99-113.​

8.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.
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, inflammation
and bone turnover following exercise: a randomized, controlled trial. Amino
Acids. 2019 Apr 1;51:691-704.​

10.Zdzieblik D, Oesser S, Baumstark MW, Gollhofer A,
König D. Collagen peptide supplementation in combination with resistance
training improves body composition and increases muscle strength in elderly
sarcopenic 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 in
human blood after daily ingestion of collagen hydrolysate for 4 weeks. Journal
of 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 dietary
supplement in athletes with activity-related joint pain. Current medical
research 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 enhances
postprandial absorption rate—a randomized controlled trial. Nutrients. 2019 May
13;11(5):1064.​

Beauty5:

1.Hooper S, Hausenblas HA,
Winters C. Efficacy of MitoHeal® supplementation on adult skin quality and
patient satisfaction: a randomized, double‐blind, placebo‐controlled, pilot
study. 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. Esperienze
Dermatol. 2015;17(4):143-8.​

3.Schulpis KH, Karikas GA, Tjamouranis J, Regoutas S,
Tsakiris S. Low serum biotinidase
activity 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 with
biotin: scanning electron microscopy. Journal of the American Academy of
Dermatology. 1990 Dec 1;23(6):1127-32.​

5.Obied HK, Prenzler PD, Konczak I,
Rehman AU, Robards K. Chemistry and bioactivity of olive biophenols in
some antioxidant and antiproliferative in vitro bioassays. Chemical research in
toxicology. 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: A
randomized, 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 glutathione
supplementation 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 vitro
proliferation, viability, steroidogenesis, oxidative stress, and cell signaling
in human granulosa cells. International Journal of Molecular Sciences. 2019 Aug
28;20(17):4215.​

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