Onion (Allium cepa) is a type of plant commonly used as a condiment for various cuisines in the world. Part of the plant most widely used is the tuber, though some culinary traditions also use the leaves and flower stalks as a food seasoning. This plant is probably derived from Central Asia and Southeast Asia.
Red onions contains vitamin C, potassium, fiber, and folic acid. In addition, red onion also contains calcium and iron. Onions also contains natural plant growth regulators such as auxin and gibberellin. Other uses for onion is as traditional medicine, red onion is known as a remedy because it contains antiseptic effect, anti-bacterial and anti-fungal.
Read More: Nutrition For Coronary Heart Disease.
Several compounds contained in red onion is Quercetin, Allicin, Chromium, and some vitamins and minerals. According to the Food and Nutrition Research Center (1964), phytochemical compounds contained in red onion are allison, alien, allil propyl sulfide, phenolic acid, fumaric acid, acid kafrilat, floroglusin, phosphorous, phytosterols, flavonoids, flavonoids, kaempfenol, quercetin, kuersertin glycosides, pectin, saponins, sterols, sikloaliin, triopropanal sulfoxide, propyl disulfide, methyl and propyl-disulfide.
One of the compounds contained in onions is quercetin, which is a polyphenol compound from flavonoid family. Onions contain compounds that are healthier than garlic. Quercetin is associated with a reduction risk of cancer due to anti-inflammatory properties. Quercetin is also a natural remedy to cope with arthritis and other diseases caused by inflammation.
This healthy compound can also improve prostate health in men, and may also be an effective weapon against prostate cancer. Red onion also has natural antihistamine properties that can reduce allergic reactions.
Alicin in red onion
According to the study from 1995 to 2005, allicin can reduce the blockage of blood vessels (atherosclerosis), fat deposits in the body (fat deposition), normalize the the balance of lipoprotein, lower blood pressure, anti-thrombotic, anti-inflammatory and antioxidant. Effective dose of allicin as an antitumour is at 5 mg / kg weight.
According to research conducted by Dr. Pratt, chief investigator of Canada, which was published in the journal Angewandte Chemie, a derivative of allicin is a potent antioxidant to fight free radicals, namely sulfonic acid. It is also supported by the results of the study by Vaidya, Ingold and Pratt were expressed about the ability of allicin to scavenge free radicals.
Red onion is rich in chromium, a mineral that can help control glucose levels. Lack of chromium-rich foods, such as onions, can lead to insulin resistance and impaired blood sugar control. Not only that, the risk of cardiovascular disease and type 2 diabetes will also increase.
Red onion also contains sulfur compound that are beneficial to health. Sulfur is the compound responsible for the spicy taste, aroma of onion and release of gases that irritate the eyes when the red onion is cut. Red onion also contains sulfur compound that are beneficial to health. Sulfur is the compound responsible for the spicy taste, aroma of onion and release of gases that irritate the eyes when the red onion is cut.
The content of sulfur in red onion is also a potent antimicrobial and antibacterial properties, and is considered as a nutrient to combat cancer cells. There is also evidence that the sulfur found in the red onion can overcome the symptoms of asthma and other respiratory problems associated with inflammation.
Vitamins and minerals
Red onion also contain high levels of vitamin C, copper, calcium, vitamin A, and vitamin E. Vitamin A, E and C is an excellent antioxidant. While copper is an essential mineral for maintaining healthy bones and joints to prevent osteoporosis.