The new viral remedy is putting slices of onion onto one’s feet at night in order to detoxify the body and boost immunity. Viral video claims onions on feet can 'detox' the bodyIn the viral clip, a man recommends placing sliced onions on the soles of the feet, securing them with plastic wrap and sleeping with them overnight. If you sleep with onions on your feet, you will detox your body overnight. The doctor encouraged viewers to verify health claims with credible medical sources instead of rrelying on viral videos. Do onions detox the body?