Women's Health1.8K reads

Collagen Types I, II, III: Which Is Best for Skin

Type I collagen makes up 80% of skin. Type III supports skin structure. Type II is for joints. Which collagen supplement type you actually need.

Medically ReviewedBloomWell Wellness Research Team, Research Team
Peptide skincare targets wrinkles at the cellular signaling level, stimulating collagen production in the dermis.
Peptide skincare targets wrinkles at the cellular signaling level, stimulating collagen production in the dermis. Photo: South Beach Skin Lab
Quick Answer
The human body contains at least 28 different types of collagen, but only three are relevant to skin health — and understanding the difference is essential for choosing the right supplement. Type I collagen is the dominant structural protein of the skin, comprising approximately 80% of the dermal collagen network.
— BloomWell Editorial Team, Editorial Team

The science of skin aging is evolving rapidly — and for women navigating the skin changes that come with menopause and beyond, evidence-based skincare represents a fundamentally different approach: working with your skin's biology rather than against it.

Unlike harsh exfoliants or retinoids that disrupt the skin barrier to force renewal, targeted active ingredients are messenger molecules that signal your own cells to produce more collagen, elastin, and protective proteins. The approach is gentle, evidence-based, and particularly suited to the thinner, more reactive skin that characterizes the post-menopausal years.

How does Understanding Collagen Types and Why Type I Dominates Skin Health work?

The human body contains at least 28 different types of collagen, but only three are relevant to skin health — and understanding the difference is essential for choosing the right supplement. Type I collagen is the dominant structural protein of the skin, comprising approximately 80% of the dermal collagen network.

It forms thick, densely packed fibers arranged in a basket-weave pattern that provides the tensile strength responsible for skin firmness and resistance to stretching. Type I collagen is also the primary collagen of bone, tendon, and ligaments. When women discuss 'collagen loss' in the context of skin aging, they are primarily referring to type I collagen degradation.[1]

What is Collagen Types I, II, III, Which Is Best for Skin?

Type III collagen comprises approximately 15% of skin collagen and is particularly concentrated in the papillary dermis (the upper dermal layer directly beneath the epidermis). Type III forms thinner, more flexible fibers than type I, and it plays a critical role in skin elasticity and the 'softness' of youthful skin. Importantly, type III collagen is the first collagen deposited during wound healing and tissue repair — it forms the initial scaffold that is later remodeled into mature type I collagen. As skin ages, the ratio of type III to type I decreases, contributing to the stiffer, less supple quality of aged skin. Supplements that stimulate both type I and type III production are ideal for comprehensive skin improvement.

What are natural approaches for collagen types i ii iii?

Clinical research confirms that type II collagen is irrelevant to skin health — it is the primary collagen of cartilage and is used in supplements targeting joint health (particularly for osteoarthritis). Type II collagen supplements are designed to support joint cartilage and are not beneficial for skin. Despite marketing that lumps all collagen types together as 'multi-collagen' products, the scientific evidence for skin benefits comes exclusively from type I and type III collagen peptides. A 'multi-collagen' supplement containing type II may be useful for joint health but provides no additional skin benefit over a type I/III-specific product — and the type II content may dilute the concentration of the skin-relevant peptides.

Choosing the right collagen supplement for skin: look for products that specifically state they contain hydrolyzed type I and/or type III collagen peptides. Marine collagen (from fish) is naturally rich in type I collagen and has excellent bioavailability for skin applications. Bovine collagen (from cowhide) contains both type I and type III in proportions similar to human skin, making it the most comprehensive option for skin supplementation. The peptide size matters: hydrolyzed collagen with a molecular weight of 2-5 kDa (kilodaltons) is optimally absorbed in the gut and has been shown to accumulate in the skin dermis after oral ingestion. Products simply labeled 'collagen' without specifying the type, source, or hydrolysis degree should be treated with skepticism — the clinical evidence supporting skin benefits comes from specific, well-characterized collagen peptide preparations, not generic collagen products.

Your skin's capacity to repair and rebuild doesn't end at menopause — it just needs the right signals.

What This Means For Your Skin

If you've tried retinol and experienced irritation, or if your skin has become more sensitive with age, there is a path forward. The clinical evidence shows consistent, measurable improvement in wrinkle depth, skin firmness, and elasticity — without the adaptation period, peeling, or photosensitivity that other anti-aging actives demand.

Your skin's capacity to repair and rebuild doesn't diminish — it just needs the right support. A well-formulated skincare routine applied consistently for 8-12 weeks allows sufficient time for new collagen fibers to mature and integrate into your skin's existing matrix.

The science is clear. The evidence is consistent. The results are measurable.

What happens next is up to you.

Sources & References (4)
  1. [1]Ricard-Blum S. "The collagen family." Cold Spring Harbor Perspectives in Biology, 2011;3(1):a004978. doi.org/10.1101/cshperspect.a004978 ↗
  2. [2]Gorouhi F, Maibach HI. "Role of topical peptides in preventing or treating aged skin." International Journal of Cosmetic Science, 2009;31(5):327-345.
  3. [3]Pickart L, et al. "GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration." BioMed Research International, 2015;2015:648108.
  4. [4]Errante F, et al. "Cosmeceutical Peptides in the Framework of Sustainable Wellness Economy." Molecules, 2020;25(9):2090.

Collagen Supplements Compared

SupplementCollagen TypeDose (clinical)Skin ResultTime to See Results
Hydrolyzed marine collagenType I5-10g/day15% wrinkle depth reduction8-12 weeks
Verisol (specific peptides)Type I bioactive peptides2.5g/day20% reduction in eye wrinkles8 weeks
Bovine collagen peptidesTypes I + III5-10g/dayImproved elasticity + hydration8-12 weeks
Vitamin C + collagenType I + cofactor5g collagen + 80mg Vit CEnhanced synthesis vs collagen alone8 weeks
UC-II (undenatured Type II)Type II (joints)40mg/dayJoint benefit (not skin-specific)12 weeks (joint focus)
BloomWell Editorial Team
BloomWell Editorial Team
Editorial Team

The BloomWell Editorial Team produces evidence-based, educational content on skin aging, skincare ingredients, and skin barrier science for women over 40. Articles are written from peer-reviewed research and reviewed by the BloomWell Wellness Research Team. This content is educational and not a substitute for personalized medical or dermatological advice.

People Also Ask

Do collagen supplements actually work for skin?

Yes. Multiple randomized controlled trials show that hydrolyzed collagen peptides (2.5-10g daily) significantly improve skin elasticity, hydration, and wrinkle depth within 8-12 weeks. They provide specific amino acids (glycine, proline, hydroxyproline) that signal fibroblasts to increase collagen production.

What type of collagen supplement is best for skin?

Type I collagen (the primary skin collagen) in hydrolyzed peptide form with molecular weight under 5000 daltons for optimal absorption. Marine collagen has slightly better skin bioavailability than bovine. Look for products with vitamin C added (essential synthesis cofactor) and third-party testing.

How long do collagen supplements take to work?

Skin hydration improvements: 4-6 weeks. Elasticity improvements: 8-12 weeks. Wrinkle depth reduction: 12-24 weeks. Nail strength: 6-8 weeks. Joint benefits: 12-24 weeks. Consistency is critical — benefits diminish within 4 weeks of stopping supplementation.

Can collagen supplements help during menopause?

Yes — particularly valuable during menopause when collagen loss accelerates to 30% in 5 years. Supplementation provides building blocks when natural production is hormonally suppressed. Combined with vitamin C and retinol, supplements can partially offset the accelerated menopausal collagen decline.

Are there side effects to collagen supplements?

Generally well-tolerated. Rare side effects include: digestive discomfort, feelings of fullness, mild bloating, or unpleasant taste. Those with fish/shellfish allergies should avoid marine collagen. There's no evidence of harmful accumulation. Quality and sourcing matter — choose reputable brands with third-party testing.