Kiwi is a treasure in fruit that combines nutrition and treatment. Sweet and sour, unique flavor, known as “the king of vitamin C.” Kiwifruit extract is the fruit extract of the Actinidia deliciosa Plant. It is a plant of the family Actinidiae, containing protein, amino acids, protease, sugar, phosphorus, potassium, calcium, magnesium, sodium, iron, and other inorganic elements and vitamin B1, vitamin C, organic acids, kiwi alkaloids, etc.

Kiwi seed oil’s main component is linolenic acid. It has various pharmacological activities such as delaying human aging, anti-cancer, anti-tumor, anti-mutation, anti-lipid peroxidation, radiation protection, cataract prevention, beautifying skin, reducing enzymes, protecting the liver, and improving immunity.

Chemical composition of kiwi extract

Kiwi extract contains fat-soluble aglycone-based triterpenoids, lutein, kiwi protease, folic acid, vitamin A precursor, vitamin C, vitamin B6, pantothenic acid, niacin, vitamin B1, vitamin B2, calcium, magnesium, potassium, iron, and phosphorus, etc., and rich in nickel, titanium, vanadium, zirconium, beryllium, indium, yttrium, selenium, lithium and strontium and other rare elements.

Health effects of kiwi extract

Kiwifruit Extract Benefits, Effects, And Uses. 2

Antioxidant effect

Since kiwifruit extract contains phenolic compounds, these components have a strong antioxidant effect. In addition, the new vitamin E component-δ-tocomonoenol isolated from kiwi fruit, has good oxygen-free radical scavenging and antioxidant capacity.

Hypoglycemic and hypolipidemic effects

The research on hypoglycemic and hypolipidemic effects of kiwi fruit extract shows that the saponins of kiwifruit have the functions of lowering blood sugar, inhibiting sweetness reaction, and anti-caries. At the same time, it can significantly reduce total serum cholesterol and increase serum cholesterol in hypercholesterolemic mice. It also increases the high-density lipoprotein cholesterol content.

Cholesterol regulating effect

Kiwi fruit extract can significantly reduce the total serum cholesterol (TC) content in hyperlipidemia mice and increase the serum high-density lipoprotein cholesterol (HDL-TC) content.

Administration of kiwifruit compound oral liquid can significantly reduce body weight, body fat, serum cholesterol, triglyceride, serum low-density lipoprotein cholesterol (LDL-C) levels and increase serum high-density lipoprotein cholesterol (HDL-C) in hyperlipidemia rats. (LDL-C) level.

Anti-aberration and anti-mutation effects

5.0 Gy γ-irradiation can significantly reduce the number of nucleated cells in mouse bone marrow, the total DNA synthesis and the DNA synthesis per unit number of cells, and the chromosomal aberration cell rate and chromosome aberration rate increase significantly.

Kiwifruit can increase the total amount of DNA synthesis by 2 to 3 times and reduce the chromosomal aberration rate by 20% to 30%. Kiwifruit can significantly inhibit cyclophosphamide (CP)-induced increase in the rate of micronucleated cells in peripheral blood binuclear lymphocytes of rats, significantly enhancing the activity of SOD in the liver of rats, increasing the content of GSH, and reducing the level of MDA.

In addition, it can also significantly induce the Activity of total glutathione thiol transferase (GST) and uridine diphosphate glucuronyltransferase (UDPGT) in rat liver.

Other functions

Kiwi extract has a tumor suppressor effect, and fresh juice has the effect of blocking the synthesis of carcinogen nitrosomorpholine. In addition, linolenic acid can promote the conversion and utilization of cholesterol, inhibit the aggregation of platelets, directly participate in cell membranes’ chemical synthesis, and regulate cell serialization.

Polyphenols have astringent, hemostatic, antibacterial, and other effects. Some extracts also show anti-HIV activity, antibacterial activity, anti-Helicobacter pylori activity, etc.

Other functions of the kiwi extract are immune regulation, anti-virus, antioxidant, anti-arteriosclerosis, anti-myocardial infarction, and cerebral embolism, anti-myocardial ischemia, antiradiation, anti-mutation, anti-cancer, anti-cancer, anti-depression, prevention and treatment of eye disease (cataracts). Kiwi fruit extract can also eliminate tension and fatigue.

What are the uses of the kiwi extract?

Kiwi juice glass

Many components are extracted from kiwifruit, which is used to prepare antibacterial and anti-inflammatory drugs. Of these, high-quality pectin is extracted from kiwifruit peel residue. The oil content of kiwifruit seeds is 25%~35%, and it is extracted from the kiwi seeds. Those are also used for food and medicine.

Kiwi extract benefits for skin

The researchers held about the shrinkage of kiwifruit extract on collagen gel in a simulation of a skin application test. The data shows that kiwifruit extract has a good shrinkage effect and can be used in skin tightening cosmetics.

Kiwifruit contains a lot of fruit acid, which can inhibit keratinocytes. As a result, cohesion and melanin can effectively remove excessive stratum corneum, lighten dark spots, and significantly improve dry and oily skin tissues.

At the same time, kiwifruit extract can promote the synthesis of cholesterol biosynthesis and has a moisturizing function. Also, it can promote the proliferation of epidermal cells and eliminate free radicals. It is used in anti-aging cosmetics.

The medical value of lutein in kiwi extract

Kiwi fruit is rich in lutein, which can accumulate in the human retina, prevent or alleviate the development of cataracts, and prevent cataracts. In addition, studies have shown that the lutein contained in kiwi can prevent the deterioration of spots and the resulting permanent blindness.

A food company in the United States has developed a “supervision health drink” based on kiwi fruit, and some studies have also proved that lutein can prevent muscle degeneration.

Lutein also has antioxidant effects, which can inhibit LDL peroxidative damage and inhibit the overexpression of vascular endothelial cell adhesion molecules, which may have a protective effect on early atherosclerosis.

The medical value of proteases in kiwi extract

Inflammation is a defense-based response. Inflammatory exudation and tissue swelling are important indicators in the early stage of inflammation. Macrophages and fibroblasts proliferate to form granulation tissue in the late-stage and chronic inflammation stages.

Studies have shown that the protease in kiwi fruit can significantly inhibit the inflammatory swelling caused by carrageenan at a dose of 20 mg/kg. Also, it can significantly inhibit the proliferation of granulation tissue and the subacute inflammation caused by formaldehyde.

Two kiwi juice bottles

The medical value of dietary fiber in kiwi extract

Dietary fiber can be divided into insoluble dietary fiber and water-soluble dietary fiber. The insoluble dietary fiber can increase and loosen the stool in the body, preventing and relieving constipation; the water-soluble dietary fiber has a good effect on regulating blood sugar and blood lipids.

Medical scientists believe that eating more foods rich in crude fiber can stimulate intestinal peristalsis and promote defecation. Therefore, it is determined that dietary fiber content in bananas is 1.6%, while that in kiwifruit is 3.4%.

The dietary fiber in kiwi has good water solubility. As a result, it can help digestion, prevent constipation, quickly remove and prevent the accumulation of harmful metabolites in the body, lower cholesterol and promote heart health.

Studies have shown that after consuming kiwi fruit every day for four consecutive weeks, 54% of patients with chronic constipation have significantly relieved symptoms, increased intestinal peristalsis, and reduced laxative use.

The medical value of arginine in kiwi extract

Kiwi fruit is rich in arginine, which is an essential amino acid to maintain human health. Cardiologists have found that arginine has a special effect on reducing the incidence of cardiovascular diseases such as coronary heart disease, hypertension, myocardial infarction, and arteriosclerosis.

We can see that L-arginine in kiwi fruit has a significant protective effect on myocardial cell damage caused by renal hypertension in rats. Its direct effect on the myocardium is mainly to promote ventricular muscle relaxation and enhance the dilation effect of ventricular muscle to maintain cardiac output. Beneficial for cardiac pumping in both physiological and pathological conditions.

The medical value of folic acid in kiwi extract

Kiwi fruit contains many folic acids, which are very suitable for women of childbearing age. Folic acid is a water-soluble B vitamin that plays a vital role in cell division and growth and synthesizes nucleic acids, amino acids, and proteins.

It is an indispensable nutrient for fetal growth and development. Conversely, inadequate folic acid intake by pregnant women can lead to neural tube defects (including spina bifida and anencephaly) in newborns.


Sam Perera, Founder of Stethostalk, is a food safety follower and organic food lover. He has completed the PLANT-BASED NUTRITION Cornell Certificate Program, Cornell University, US. Before this, he worked for a few years in IT services. A dedicated follower of nature, he believes in healing with natural foods. In his free time, he loves Gardening, Blogging, and traveling.