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Collagen Type 3 – Function, Sources & Deficiency

Collagen Type 3 is a structural protein found in skin, blood vessels, and internal organs that provides elasticity and strength to connective tissue throughout the body.

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Things worth knowing about "Collagen Type 3"

Collagen Type 3 is a structural protein found in skin, blood vessels, and internal organs that provides elasticity and strength to connective tissue throughout the body.

What is Collagen Type 3?

Collagen Type 3 (also known as Collagen Type III) is a fibrillar structural protein and one of the most abundant collagen types in the human body. It is primarily found in elastic tissues such as the skin, blood vessel walls, intestines, and internal organs including the liver and lungs. Collagen Type 3 frequently co-localizes with Collagen Type 1 and forms reticular fibers that provide flexibility and tensile strength to tissues.

Biological Functions

Collagen Type 3 performs several essential roles in the body:

Tissue elasticity: It provides the ability of skin, blood vessels, and organs to stretch and return to their original shape.
Wound healing: Collagen Type 3 is among the first collagen types synthesized following tissue injury, temporarily stabilizing the wound. It is later partly replaced by Collagen Type 1 during tissue remodeling.
Vascular integrity: It is a key component of blood vessel walls, supporting their structural stability and flexibility.
Organ structure: In organs such as the liver, spleen, and kidneys, Collagen Type 3 forms the scaffolding for the organ parenchyma.
Intestinal wall support: It contributes to the mechanical integrity of the gastrointestinal tract wall.

Distribution in the Body

Collagen Type 3 is particularly abundant in the following tissues and organs:

Skin (dermis)
Blood vessels (arteries and veins)
Intestinal wall
Lungs
Liver and spleen
Uterus
Heart and heart valves

Collagen Type 3 and Skin Health

In the skin, Collagen Type 3 works closely alongside Collagen Type 1. While Collagen Type 1 is primarily responsible for the firmness of skin, Collagen Type 3 plays a significant role in maintaining elasticity and suppleness. As the body ages, the production of both collagen types declines, leading to wrinkle formation, reduced skin elasticity, and slower wound healing. Collagen Type 3 is proportionally more abundant in young skin and decreases relative to Collagen Type 1 over the course of a lifetime.

Collagen Type 3 in Diet and Supplementation

Collagen Type 3 can be obtained through dietary sources and nutritional supplements. Natural food sources include:

Bone broth (from beef, chicken, or fish)
Gelatin-containing foods
Connective tissue-rich meats
Collagen peptides derived from animal sources (bovine, marine)

Collagen Type 3 is frequently included in multi-collagen supplements that combine several collagen types. Hydrolyzed collagen (collagen peptides) is broken down in the digestive tract into amino acids and peptides that the body can use for its own collagen synthesis. Clinical studies suggest that regular collagen peptide supplementation may improve skin elasticity and support joint health.

Collagen Type 3 Deficiency and Related Conditions

A deficiency or impaired synthesis of Collagen Type 3 can result in serious health conditions:

Ehlers-Danlos Syndrome (vascular type, Type IV): A genetically inherited disorder caused by mutations in the COL3A1 gene that impairs the production of Collagen Type 3. This results in fragile blood vessels, increased susceptibility to injury, and an elevated risk of spontaneous organ rupture.
Fibrosis: In chronic inflammatory states or tissue damage, excessive deposition of Collagen Type 3 can occur, leading to scarring and functional impairment of affected organs.
Age-related collagen decline: With advancing age, Collagen Type 3 production decreases, manifesting as reduced skin elasticity, increased vascular stiffness, and slower tissue repair.

Supporting Collagen Synthesis

The body requires specific nutrients to effectively produce Collagen Type 3:

Vitamin C: Essential for the hydroxylation of proline and lysine, two amino acids critical for the structural stability of collagen fibers.
Glycine and Proline: Amino acids that serve as the primary building blocks of collagen.
Zinc and Copper: Trace elements that act as cofactors for collagen-synthesizing enzymes.
Silicon: Supports the cross-linking of collagen fibers and the stability of connective tissue.

References

Ricard-Blum, S. (2011). The Collagen Family. Cold Spring Harbor Perspectives in Biology, 3(1), a004978. doi:10.1101/cshperspect.a004978
Proksch, E. et al. (2014). Oral Supplementation of Specific Collagen Peptides Has Beneficial Effects on Human Skin Physiology. Skin Pharmacology and Physiology, 27(1), 47-55. doi:10.1159/000351376
Pepin, M. G. & Byers, P. H. (2011). Ehlers-Danlos Syndrome, Vascular Type. In: GeneReviews. National Center for Biotechnology Information (NCBI). Available at: https://www.ncbi.nlm.nih.gov/books/NBK1494/

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