Hydrolyzed marine collagen and the skin's moisture barrier
What the research says about hydrolyzed marine collagen and the skin's moisture barrier
When collagen is discussed in a research context, it is often related to the structure and elasticity of the skin. Another area that has been studied is the skin's moisture barrier – a complex system that plays a central role in the skin's ability to retain moisture and protect against external influences.
The skin's moisture barrier acts as a natural barrier and helps to limit transepidermal water loss (TEWL). With increasing age, the composition of the skin changes, partly due to reduced endogenous collagen production. Research has linked this to changes in the skin's structure and moisture balance.
What is the skin's moisture barrier?
In scientific literature, the skin's moisture barrier is described as being made up of several interacting components, including:
- collagen fibers, which contribute to the structural stability of the skin
- lipids, which are involved in preserving moisture and limiting water loss
- keratinocytes, skin cells that form a protective surface layer
When collagen levels change, this can affect barrier function, which in studies has been associated with variations in skin moisture levels and structure.
Studies on collagen peptides and skin-related parameters
Several clinical studies have investigated how intake of hydrolyzed marine collagen correlates with measurable skin parameters under controlled conditions.
In a randomized, double-blind study, changes in skin moisture levels were reported after eight weeks of collagen peptide supplementation. Further variations in the same measurement parameters were observed at longer follow-up. The results were average changes in study participants and varied depending on study design and measurement method.
In other studies, researchers have analyzed transepidermal water loss (TEWL) as a measure of skin barrier function. In these studies, changes in TEWL have been reported in groups studied over a period of time.
Additional studies have examined dermal properties such as skin density and elasticity. In these studies, researchers have analyzed how various skin-related parameters changed over time in controlled environments.
Why marine collagen is being studied in particular
Marine collagen is characterized in the research literature by its peptide structure and composition of amino acids such as glycine, proline and hydroxyproline. These properties are one of the reasons why hydrolyzed marine collagen has been the subject of several studies in the field of skin and aging.
The research also discusses the bioavailability of collagen, which in this context refers to how the peptides are absorbed and metabolized in the body as part of normal protein intake.
Time aspect in studies
In published studies, follow-up time varies, but measurements have often been taken after several weeks of regular intake. The results reported are observations in research settings and should be interpreted in relation to study design, dosage, and individual factors.
Context and interpretation
The results reported in scientific studies describe relationships observed under controlled conditions. How these observations relate to individual experiences may vary and be influenced by several factors, such as lifestyle, diet, and individual circumstances.
Sources and references
Proksch et al. (2014). Oral intake of specific collagen peptides improves skin hydration and skin elasticity in women: a randomized, double-blind, placebo-controlled study. Journal of Cosmetic Dermatology.
De Miranda et al. (2021). Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis. International Journal of Dermatology.
Bolke et al. (2019). Collagen peptides improve skin hydration and dermal collagen density. Nutrients.
Sibilla et al. (2015). An Overview of the Beneficial Effects of Hydrolysed Collagen as a Nutraceutical on Skin Properties: Scientific Background and Clinical Studies. Journal of Cosmetic Dermatology.
Inoue et al. (2016). Skin moisture improvement effect and safety evaluation of fish-derived collagen peptides. International Journal of Molecular Sciences
The information above is intended for general knowledge and should not be construed as medical advice.
