Super Food Garlic and Skin Aging

Posted by Chantel Martiromo 

Skin aging is one of most visible ageing process which occurs constantly in our skin organ. According to the Clinical Centre of Nis, certain plant extracts may have the ability to scavenge free radicals, to protect the skin matrix through the inhibition of enzymatic degradation, or to promote collagen synthesis in the skin,  affect skin elasticity and tightness(a). Other suggested that free radicals induced domino effects in production of reactive oxygen species, can react with DNA, proteins, and fatty acids, causing oxidative damage and impairment of antioxidant system, leading  injuries damage regulation pathways of skin,  including wrinkles, roughness, appearance of fine lines, lack of elasticity, and de- or hyperpigmentation marks(b).
The degradation of the epidermal and dermal layers of the extracellular matrix (ECM), the non-cellular component present within all tissues and organs, such as UV Exposure, decline of lysosomal/endosomal cathepsin K, S and V activity(c) as well as environment factors such as irregular dryness, dark/light pigmentation, sallowness, severe atrophy, telangiectases, premalignant lesions, laxity, leathery appearance and deep wrinkling, etc.,  cause modification of the surface of skin and the physical properties of that lead to skin aging. Certain foods have been found to be effective in protect the skin against natural aging, including green tea and garlic.
Garlic (Allium sativum) is a species in the onion genus, belonging to family Amaryllidaceae, native to central Asia. It has been used popularly in traditional and Chinese medicine in treating common cold and flu to the Plague, blood pressure cholesterol levels, natural antibiotic, etc.
In wrinkle formation, caffeic acid and S-allyl cysteine found in garlic significantly inhibited the degradation of type І procollagen and the expressions of MMPs in vivo and attenuated the histological collagen fiber disorder and oxidative stress in vivo, through decreased oxidative stress and inflammation by modulating the activities of NF-κB and AP-1, and exhibited an indirect anti-oxidant effect by suppressing cyclooxygenase-2 (COX-2) and induced nitric oxide synthase (iNOS) expressions levels and down-regulated transcriptional factors(1). Its garlic's antioxidant properties  may either prevent or delay chronic diseases associated with aging(2). According to Aarhus University, garlic not only protected skin cell from undergo aging process but also inhibited the abnormal growth of skin cells, through its on long-term growth characteristics, morphology and macromolecular synthesis of human fibroblasts(3).

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References
(a) Skin ageing: natural weapons and strategies by Binic I¹, Lazarevic V, Ljubenovic M, Mojsa J, Sokolovic D.(PubMed)
(b) Phytoconstituents as photoprotective novel cosmetic formulations by Saraf S¹, Kaur CD.(PubMed)
(c) Differential expression of cathepsins K, S and V between young and aged Caucasian women skin epidermis by Sage J¹, De Quéral D², Leblanc-Noblesse E², Kurfurst R², Schnebert S², Perrier E², Nizard C², Lalmanach G³, Lecaille F⁴.(PubMed)
(1) Anti-wrinkle and anti-inflammatory effects of active garlic components and the inhibition of MMPs via NF-κB signaling by Kim SR¹, Jung YR, An HJ, Kim DH, Jang EJ, Choi YJ, Moon KM, Park MH, Park CH, Chung KW, Bae HR, Choi YW, Kim ND, Chung HY(PubMed)
(2) Garlic and aging: new insights into an old remedy by Rahman K(PubMed)
(3) Testing garlic for possible anti-ageing effects on long-term growth characteristics, morphology and macromolecular synthesis of human fibroblasts in culture by Svendsen L¹, Rattan SI, Clark BF.(PubMed)