Common food dye found to make skin and muscle temporarily transparent

Researchers say procedure not yet tested on people could eventually be used to help locate injuries or tumours

Researchers have peered into the brains and bodies of living animals after discovering that a common food dye can make skin, muscle and connective tissues temporarily transparent.

Applying the dye to the belly of a mouse made its liver, intestines and bladder clearly visible through the abdominal skin, while smearing it on the rodent's scalp allowed scientists to see blood vessels in the animal's brain.