Kiwi seed oil -
Monday, 20 May 2013 | Admin
All Kivvi Organic Cosmetics products contain kiwi (lat. Actinidia chinensis) seed oil.
- Kiwi fruits are an excellent source of vitamin C, the average-sized fruit contains around 90 mg. Vitamin C content up to 300mg/100g has been reported from Indian samples. The total chlorophyll (chlorophyll a+b) in ripe kiwi fruit is about 100µg/100g. A proteolytic enzyme actinidin, polyphenol oxidase, and peroxidase, are also present in kiwi fruit. The properties of actinidina are similar to those of papain. Actinidin concentration in the fruit is approximately 0.4/100g fresh weight. The high fibre content of this fruit and the special characteristics of the mucilage make kiwi fruit an excellent laxative (Kotecha & Madhavi, 1995).
- The chemical composition of kiwi fruit. Content (mg/100 g fresh weight unless otherwise specified). Water 82-86%, Fiber 1.1-3.3%, Soluble solids 12-17%, Pectic compounds 0.2-0.9, pH 70-900, Lipid 150, Mucilage 0.2-0.3, Chlorophyll 0.4-1.0%, Energy value 15-18%, Protein 2-3%, Carbohydrate 1.0-1.6%, Organic acids 450-740, Titratable acidity (ac citric) 50-84, Ash 84, Oxalate 80-120, Vitamins 0.014-0.02, Ascorbic acid 0.0-0.5, Thiamin 0.13, Nicotinic acid 0.05, Vitamin E 0.010-0.05, Vitamin A 0.15, Pyridoxine (B6) 200-450, Minerals 30-65, Potassium 16-51, Chloride 10-20, Calcium 0.2-1.2, Magnesium 0.08-0.32, Iron 0.07-0.2, Zinc 93-163, Manganese 22-40, Nitrogen 13-30, Phosphorous 2.8-4.7, Sulfur 0.2-0.37, Sodium 0.06-0.3, Boron 0.2-0.37, Copper 0.06-0.3. (Kotecha & Madhavi, 1995).
- Traditional uses. The name kiwi was given in New Zeeland because of this fruits looks like the bird kiwi. Kiwi fruit is rich in vitamin C, which has antioxidant activity, and vitamin B, mainly folic acid, a nutrient that enhances the immunological system. Because of its antioxidant property, kiwi fruit has anti-ageing and wound healing activity. Kiwi fruit is also rich in minerals such as potassium, magnesium and fiber –which is very useful to fight constipation. This fruit also has the enzyme actinidin that aids digestion. Other reported traditional uses include treatment of urinary calculi, and as a diuretic, febrifuge, and sedative.
- Antioxidant activity. Vitamin C is a potent antioxidant with radical scavenging activity very useful in the treatment of photoaging. Vitamin C has photoprotective properties similar to those of vitamin E. Vitamin C can neutralize free radicals generated by UVB radiation. A study using pigs revealed that a pre-treatment with vitamin C 10% reduced UVB-induced erythema and skin burn. In a further study, ascorbate also exerted similar protective effects against UVA radiation; it reduced the skin burns of pigs previously sensitized with psoralen and exposed to UVA. Other experimental models using human skin demonstrated similar effects for ascorbate as well as for the combination of ascorbate and vitamin E (Chiu A. & Kimball AB., 2003). Therefore, kiwi extract is highly recommendable to formulate cosmetic products aimed at preserving the skin and hair integrity from oxidative processes.
- Cell regeneration stimulating activity. This activity is due to the α-hydroxyacids (AHA) content of kiwi. AHA act at the stratum corneum level. They act on the cohesion between corneocytes in the deepest layers, so that they make the stratum corneum thinner and improve skin flexibility. Thus, kiwi extract is recommendable to formulate cosmetic products with exfoliating activity.