Editor’s note: Not only garlic and onions, but also other allium vegetables like leeks, chives, scallions and shallots can help prevent or fight hypertension and diabetes. These vegetables can also provide a range of other health benefits. They can prevent infections such as common cold and flu, can help control blood pressure and cholesterol, and prevent heart disease, prevent and treat various cancers, lower your risk for dementia and Alzheimer’s disease, detoxify heavy metals from your body and potentially extend your lifespan.
編者註：不僅大蒜和洋蔥，而且韭蔥，細香蔥，蔥和蔥等其他蔥類蔬菜也可以幫助預防或抵抗高血壓和糖尿病。 這些蔬菜還可以提供一系列其他健康益處。 它們可以預防普通感冒和流感等感染，可以幫助控制血壓和膽固醇，並預防心髒病，預防和治療各種癌症，降低癡呆症和阿爾茨海默氏病的風險，排毒重金屬以及延長壽命 。
Friday, April 16, 2021 by: Evangelyn Rodriguez
(Natural News) Alliums are disease-fighting vegetables widely used as everyday food and traditional medicines. This incredible family of edible medicinal plants is composed of garlic, white and purple onions, leeks, chives, scallions and shallots. According to studies, alliums contain unique compounds called organosulfur compounds and natural antioxidants called polyphenols that are responsible for their disease-fighting activities.
In a recent study, researchers at the Federal University of Technology in Nigeria investigated the benefits of eating garlic, white onion and purple onion against serious conditions like diabetes and hypertension. They confirmed these by looking at how extracts from the three alliums affect the activity of diabetes-related enzymes, such as a-amylase and a-glucosidase, and the hypertension-related enzyme, angiotensin-converting enzyme (ACE).
The researchers reported their findings in an article published in the Journal of Dietary Supplements.
Garlic, white onion and purple onion show antioxidant, antidiabetic and antihypertensive properties
Garlic and onions are spices commonly used in cooking. They also serve as ingredients in several traditional delicacies in Nigeria that are known to contain plenty of polyphenols. To assess the beneficial properties of garlic, white onion and purple onion, the researchers first obtained extracts from each and assessed their inhibitory effects on certain enzymes. They also conducted assays to determine the antioxidant capacities of the extracts.
ACE is the enzyme responsible for converting angiotensin I into angiotensin II, the hormone that increases blood pressure, as well as body water and sodium content. Angiotensin II elevates blood pressure by constricting the blood vessels; hence, chemicals that can inhibit the activity of ACE, which is responsible for the production of angiotensin II, are used for the treatment of hypertension. (Related: Meet the “two-day cure” plant: An African medicinal plant that can naturally lower blood pressure.)
a-Amylase is the enzyme that breaks down starch and glycogen into glucose and maltose (two glucose molecules bound together). In humans, this enzyme is produced by the salivary glands and the pancreas. a-Glucosidase, on the other hand, is responsible for breaking down carbohydrates in the small intestine and facilitating the absorption of glucose. Inhibiting the activity of this enzyme is one of the strategies currently used to prevent the rise of blood sugar levels following a carbohydrate-filled meal.
The researchers reported that the garlic, purple onion and white onion extracts inhibited the activities of ACE, a-amylase and a-glucosidase in vitro in a concentration-dependent manner. At a half maximal inhibitory concentration (IC50) of 0.59 mg/mL, the purple onion extract exhibited a higher inhibitory effect on ACE than the white onion extract (IC50 = 0.66 mg/mL) and the garlic (IC50 = 0.96 mg/mL) extract.
Meanwhile, the white onion extract showed a significantly stronger inhibitory effect on a-amylase at an IC50 of 3.93 mg/mL than the garlic extract (IC50 = 8.19 mg/mL) and the purple onion (IC50 = 8.27 mg/mL) extract. The garlic extract, on the other hand, showed a similar inhibitory effect (IC50 = 4.50 mg/mL) on a-glucosidase as the white and purple onion extracts. All three extracts also showed dose-dependent free radical scavenging activity and reducing power in the antioxidant assays.
Based on these findings, the researchers concluded that garlic, white onion and purple onion can be used to treat or prevent diabetes and hypertension, thanks to their ability to inhibit ACE, a-amylase and a-glucosidase activity, as well as lipid peroxidation in the pancreas and the heart.