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Jennifer R. Fishman. Anti-aging science: The emergence, maintenance, and enhancement of a discipline https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3528075/. Published in final edited form as: J Aging Stud. 2008 Dec 1; 22(4): 295–303.

Liang, Bryan A. and Hartman, Kurt M. (1999) It’s Only Skin Deep: FDA Regulation of Skin Care Cosmetics Claims https://scholarship.law.cornell.edu/cjlpp/vol8/iss2/2/. Published, Issue 2 Winter 1999, Cornell Journal of Law and Public Policy: Vol. 8: Iss. 2, Article 2.

Karl Lintner. Chapter 36: Peptides and proteins http://www.kalidees.com/articles/peptides_draelos.pdf. Published For Web on Dermascope.

Hyang Joo, Peptides: A Fresh Look at these Miracle Moleculeshttps://www.dermascope.com/ingredients/peptides-a-fresh-look-at-these-miracle-molecules. Published September 2007. Accessed March 8, 2018.

Chris Li, and Kyuhyung Kim, Department of Biology, City College of New York Department of Biology. Neuropeptides* http://www.wormbook.org/chapters/www_neuropeptides/neuropeptides.pdf Last revised February 5, 2008. Published April 7, 2008

Y. Wang M. Wang. S. Xiao. P. Pan P. Li J. Huo. The Second Hospital of Xi’an Jiaotong University. The Anti-Wrinkle Efficacy of Argireline.https://www.dermagist.com/shop/wp-content/uploads/2016/12/argireline-sheet.pdf. Published online: 16 February 2013 Springer International Publishing Switzerland 2013.

Silke Karin Schagen. Topical Peptide Treatments with Effective Anti-Aging Results. http://www.mdpi.com/2079-9284/4/2/16/htm Published: 22 May 2017

JENNIFER LINDER, MD. Understanding cosmeceutical peptides. http://www.teknoscienze.com. Published Household and Personal Care Today, Vol. 9 nr. 1 January/February 2014.

Kelly Bilodeau, Former Executive Editor, Harvard Women's Health Watcha https://www.health.harvard.edu/blog/skin-serum-what-it-can-and-cant-do-2018061214029. Published June 12, 2018