Onion has numerous beneficial properties for our body. Its regular consumption is good for the heart, in fact the sulfur compounds present in the onion perform an anticoagulant action, improve the cell membrane of red blood cells and reduce blood levels of cholesterol. Thanks to the presence of quercetin and sulfur compounds, it has an antimicrobial action, eliminating harmful microorganisms such as yeasts and bacteria from our body. The high water content makes the Onion an excellent natural diuretic that promotes the elimination of waste by fighting water retention and cystitis, given its antiseptic and anti-inflammatory properties. The folates present in the onion promote sleep and good mood, in fact they regulate the level of homocysteine in the body, the excessive presence of which would be an impediment. In addition to having antioxidant properties, it regulates blood sugar levels by lowering blood sugar levels. In addition to the aforementioned anti-inflammatory action, the onion also carries out the mucolytic and antibiotic action, so it fights pharyngitis, sinusitis, cough, bronchitis and bronchial asthma. Regular consumption of onion is a valuable aid in fighting osteoporosis and improving bone mass. It prevents breast, prostate, stomach and colon cancers. Onion is very often indigestible due to Fodmaps, short-chain carbohydrates, which can cause dysentery, cramps and aerophagia. It is not recommended for people with irritable bowel syndrome. It is absolutely to be avoided in the diet of dogs, cats, horses, as the sulfoxide and sulphide compounds could induce a disease called Heinz Body Anemia or Hemolytic Anemia