Kil, Min Seong, Chul Woo Kim, and Sang Seok Kim. "Analysis of serum zinc and copper concentrations in hair loss." Annals of Dermatology 25.4 (2013): 405.
Oesser, Steffen. "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).
Reilly, David M., et al. "A Clinical Trial Shows Improvement in Skin Collagen, Hydration, Elasticity, Wrinkles, Scalp, and Hair Condition following 12-Week Oral Intake of a Supplement Containing Hydrolysed Collagen." Dermatology Research and Practice 2024.1 (2024): 8752787.
Milani, Massimo, Francesca Colombo, and GFM‐O‐Trial Investigators Group: Chiara Baraldo (Padova), Mauro Barbareschi (Milano), Paolo Chieco (Ruvo di Puglia), Laura Colonna (Roma), Mandel Victor Desmond (Modena), Maria Cristina Fiorucci (Genova). "Efficacy and tolerability of an oral supplement containing amino acids, iron, selenium, and marine hydrolyzed collagen in subjects with hair loss (androgenetic alopecia, AGA or FAGA or telogen effluvium). A prospective, randomized, 3‐month, controlled, assessor‐blinded study." Skin Research and Technology 29.6 (2023): e13381.
Igielska-Kalwat, Joanna, Ewa Kilian-Pięta, and Sława Połoczańska-Godek. "The use of natural collagen obtained from fish waste in hair styling and care." Polymers 14.4 (2022): 749.
Kowalska, Aleksandra, Julia Bartkiewicz, and Katarzyna Dettlaff. "Biotyna–fakty i nadzieje." Farm Pol 78.7 (2022): 403-411.
Górska, Magdalena, Martyna Ziaja, and Klaudia Drab. "Wpływ suplementacji kolagenu na jakość skóry, włosów i paznokci." Polish Journal of Cosmetology 26.4 (2023): 187-195.
Zuchowski, Aleksander, and Anna Nowicka-Zuchowska. "Kolagen–rola w organizmie i skutki niedoboru." (2019).
De Luca, Chiara, et al. "Skin antiageing and systemic redox effects of supplementation with marine collagen peptides and plant‐derived antioxidants: a single‐blind case‐control clinical study." Oxidative medicine and cellular longevity 2016.1 (2016): 4389410.
Kaziród, Karolina, et al. "Suplementacja kolagenem–czy przynosi realne korzyści." Quality in Sport 13.1 (2023): 88-107.
https://www.doz.pl/czytelnia/a17781-Kolagen_na_wlosy_Jaki_wybrac_Efekty_stosowania_kolagenu_na_kondycje_wlosow
https://trychologgdansk.pl/cynk-a-wlosy/
https://www.izielnik.pl/blog/kolagen-na-wlosy-jak-stosowac-i-czy-pomaga?srsltid=AfmBOoqpF008X3YPDoMXi0Y8yt4DW-TzCvQhYBKEfxCCqqd7p6EMKLaH
https://dietetycy.org.pl/selen-tarczyca/
https://drturowski.pl/pl/niedobor-selenu-a-wlosy-objawy-i-jak-uzupelnic-zapotrzebowanie/
https://natu.care/pl/kolagen/kolagen-verisol
https://www.apteka-melissa.pl/blog/artykul/biotyna-jakie-ma-wlasciwosci-i-na-co-wplywa,864.html