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Onion and crying

  1. It is well known to everyone! Cutting onions irritates the eyes and causes tears. To me, those watery eyes are direct evidence of the physiological effect of a "herb" on the human body.

Onion and our health

  1. Onions are active against fungus and bacteria, they protect against stomach, colon and skin cancer, they inhibit inflammation and allergies, have anti-asthmatic and anti-diabetic properties, lower blood pressure, good for arteriosclerosis and good for the blood vessels in general. They inhibit the formation of plaques in the blood vessels and lower cholesterol. Truly an impressive list and not made up.

Onions and watery eyes

  1. Our tears are caused by the volatile oils that give Allium varieties their specific flavor and contain amino acid sulfoxides. Now when we cut an onion, allinase is released. This is an enzyme that converts sulfur oxides into sulfenic acids. These compounds then convert to syn-propanethial-S-oxide; a volatile substance, a gas and that is the culprit we are looking for. Sulfenic acids condense (precipitate) into thiosulfinates, the substances that irritate your nose and are often falsely blamed for the running eye. About thirty seconds after working on the onions, the production of syn-propaanthial-S-oxide peaks. The further chemical evolution of the substance takes place in less than five minutes.

Remedies for tears

  1. You can heat the onions before chopping them into pieces. The heat changes the enzymes, causing them to lose their effectiveness. You can also prevent the irritating gases from reaching your eyes by cutting your onions on a windy patio or under a slow-flowing water jet. Incidentally, there are all kinds of mechanical devices with which the onions can be finely chopped in a sealed container. But for me those onions may continue to cause tears.

Still only a few scientific studies on the health value of onion

  1. Preliminary Study of the Clinical Hypoglycemic Effects of Allium cepa (Red Onion) in Type 1 and Type 2 Diabetic Patients; Taj Eldin IM, et al .; 2010 Dorsch W et al. Antiasthmatic effects of onion extracts — detection of benzyl and other isothiocyanates (mustard oils) as antiasthmatic compounds of plant origin. European journal of pharmacology, 1985, 107: 17–24. 44. Dorsch W et al. Anti-asthmatic effects of onions. Alk (en) ylsulfothioc acid al (en) yl esters inhibit histamine release, leukotriene and thromboxane biosynthesis in vitro and counteract PAF and allergen-induced bronchial spasm in vivo. Biochemical Pharmacology, 1988, 37: 4479–4486. Kaczmarek F et al. Preparation of a diuretic fraction from three onion scales. Bulletin of the Institute of Roslin Leczniczych, 1961, 7: 157–166. De A, Ribeiro R et al. Acute diuretic effects in conscious rats produced by some medicinal plants in the state of São Paulo, Brazil. Journal of ethnopharmacology, 1988, 24: 19–29.

  2. Preliminary Study of the Clinical Hypoglycemic Effects of Allium cepa (Red Onion) in Type 1 and Type 2 Diabetic Patients; Taj Eldin IM, et al .; 2010 Dorsch W et al. Antiasthmatic effects of onion extracts — detection of benzyl and other isothiocyanates (mustard oils) as antiasthmatic compounds of plant origin. European journal of pharmacology, 1985, 107: 17–24. 44. Dorsch W et al. Anti-asthmatic effects of onions. Alk (en) ylsuphinothioc acid al (en) yl esters inhibit histamine release, leukotriene and thromboxane biosynthesis in vitro and counteract PAF and allergen-induced bronchial spasm in vivo. Biochemical pharmacoogy, 1988, 37: 4479–4486. Kaczmarek F et al. Preparation of a diuretic fraction from three onion scales. Bulletin of the Institute of Roslin Leczniczych, 1961, 7: 157–166. De A, Ribeiro R et al. Acute diuretic effects in conscious rats produced by some medicinal plants in the state of São Paulo, Brazil. Journal of ethnopharmacology, 1988, 24: 19–29.



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