Collagen and green tea in relation to skin protection
Collagen may help maintain the structure of your skin; green tea may keep it healthy and disease-free
Collagen and green tea are often promoted in the media as ‘healthy’ and ‘cure-alls’, So, how important are they for a healthy skin?
Collagen is a long fibrous structural protein constituting roughly 70 – 80% of the dry weight of our skin. It forms fibrous bundles with great tensile strength – these are what provide strength and elasticity in tissues found in the body including ligaments, tendons, cartilage and skin. As we age, not only do levels of collagen fall, but also the distribution of collagen fibers alters; instead of a smooth even distribution of collagen fibrils they become increasingly distributed in large, bundle-like aggregates, sparsely arranged through the dermis . The dermis provides the strength and structure of the skin.
Matsuda et al showed in 2006 that ingestion of hydrolyzed collagen (collagen broken down in to smaller, much more easily digested pieces- also called collagen peptides-, giving up to 95% bioavailability with no toxic effects ) enhances the formation of collagen fibrils in the dermis. This study also showed an increase in the number of fibroblasts – these are the cells that make collagen and are themselves important in skin structure. [7,13].
There is support for these findings. A well known British product containing hydrolyzed collagen was consumed by 22 participants in a clinical study to gauge it’s effects on wrinkle formation and hydration in the skin over a period of 12 weeks (14). Participants ingesting hydrolyzed collagen found a reduction of 26% in fine wrinkle formation. A protective effect was also seen against the formation of deep-wrinkles, with a reduction of 24% compared to control participants receiving a placebo. Volunteers also reported improvements in skin tone and suppleness of 32% and 45% respectively.
Ingestion of hydrolyzed collagen also increases skin hydration as reported by, among others, Morganti [9,10] and supported by Sumida . Consumption of hydrolyzed collagen seems to increase the water-binding capacity of the epidermis, so the surface layers of the skin can retain more moisture – 68% of volunteers reported that their skin was less dry after 8 weeks of taking hydrolyzed collagen. Keeping the skin functioning as best as possible is a great protective strategy, as well as something that will keep us feeling good. Based upon these studies regular ingestion of collagen may help maintain normal functioning and slow ageing
Green tea has been regarded as a health-giving medicinal drink for centuries. Matcha green tea is a fine bright green powder made from the finest, shade-grown tender green tea buds, and it is this form of green tea that yields the greatest benefits.
Why green tea?
Green tea contains very high levels of polyphenols. Polyphenols have been studied in animals and human model systems. In such studies polyphenols have an antioxidant effect for your whole body, and also protect the skin from sun damage. Although sunlight does stimulate skin vitamin D synthesis, the UV component of sunlight is very damaging. Solar UV radiation is the cause of a large proportion of skin diseases, the most severe being skin cancer. It is also considered to be one of the most preventable types of cancer [11,4,1]. UV radiation may damage your skin by causing DNA damages, reducing levels of antioxidant enzymes, immunosuppression, oxidative stress by creating free radicals, inflammation, initiating tumours, promoting tumour growth, and premature ageing of the skin. Both UVA light and UVB light cause damage, penetrating to different depths of the skin and so damaging different layers [11,2,3].
Polyphenols found in matcha green tea seems to offer one practical way to help protect yourself against the raft of damaging effects sunlight can have. Such benefits have also been seen in human skin, where inflammation and oxidative stress induced by UV radiation is inhibited by green tea . Green tea extracts protect human skin fibroblasts from premature cell death caused by reactive oxygen species . Drinking green tea also protects human cellular DNA from UV and visible radiation-induced DNA damage .
More studies are clearly wanted to prove the indicated health benefits of both collagen and green tea extracts. This will show their potential power to contribute to help build a healthy lifestyle.
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