Onions have various uses ranging from health benefits to cleaning benefits and much more. Onion is said to be a crucial part of almost every popular cuisines and perhaps the best home remedies ever found. Here are some of the best ways to use onions other than using it for cooking: 1. For hair Onion and its juice are widely renowned to strengthen hair, prevent hair fall and stop hair thinning which occur due to lack of sulphur proteins. Onions have high content of proteins thereby it nourishes the scalp easily. 2. For skin Onion juice masks are beneficial in the prevention of pimples, acne, pigmentations and dark skin. It acts as an anti aging factor. It also helps in nourishing the skin with essential vitamins and improves skin texture. 3. Clean knives Onion juice contains sulphanilic acid. It is used to remove the rust made up of hydrogen ions from the knives. The acid in onion juice helps to remove rust easily. 4. Clean metal utensils Onion juice helps in cleaning metallic objects. Its also used for cleaning bbq grills. Prepare a mixture of onion juice and water in equal proportions. Dip a piece of cloth in this mixture and wipe the metal utensils with it. After that rinse off the onion juice and repeat till the utensil begins to shine.