When you eat onions the onions do help to draw out toxins from inside your body.
Onions also help boost your immune system which means the onions can help you fight off the flu and cold viruses as well as many other viruses.
Onions are very healthy to eat and are full of nutrients, antioxidants etc.
Onions have been known for helping Boost Digestive health, improving digestion, increase your bone density and help with your bone health, helps build a strong heart and may even prevent heart disease, onions may also prevent some cancers, control your blood sugar and much more.
However onions only draw out toxins from your body when you eat them.
Just placing onions in your sock or near you won't remove toxins and that part is just a myth that has been going around for many years.