Keratin is a protein found in many organs and tissues throughout the body. It's not limited to a single organ.
Keratin's Widespread Presence
Several references confirm keratin's presence in various locations:
-
Skin: Keratin is a major component of the skin, contributing to its strength and protection. [This is widely documented across multiple sources](https://www.ncbi.nlm.nih.gov/books/NBK470464/, https://my.clevelandclinic.org/health/body/23204-keratin, https://www.verywellhealth.com/keratin-5083786). The skin, being the body's largest organ, naturally contains a significant amount of keratin.
-
Hair and Nails: Keratin forms the structural basis of hair and nails, providing their characteristic strength and resilience. [This is a well-established fact](https://my.clevelandclinic.org/health/body/23204-keratin, https://www.verywellhealth.com/keratin-5083786).
-
Internal Organs: While less well-known, keratin is also present in the lining of various internal organs, including the intestines. [Research specifically mentions its presence in the small and large intestines](https://pubmed.ncbi.nlm.nih.gov/111242/, https://pubmed.ncbi.nlm.nih.gov/15075232/). Its role here contributes to the structural integrity of these epithelial tissues.
-
Glands: Keratin is found in various glands throughout the body, supporting their structure and function. This is mentioned in a Cleveland Clinic article.
It's crucial to understand that keratin's role varies depending on its location. While it provides structural support in hair and nails, its function in internal organs might be more related to maintaining the integrity of epithelial cell layers.
