The young woman, whose name has been withheld to protect her identity, was found at a property in Tenterden, Kent. She was taken out of school at the age of nine by her parents, who decided to home school her.
Police received a tip-off from a concerned neighbour which resulted in the arrest of her parents, who were charged with neglect.
A source told The Sun, the woman was distressed and had been taken into care, where she was receiving psychiatric and physical help. Police found that she had not seen a doctor or dentist in the time she was allegedly held captive.
Her parents are out on bail pending an investigation by Kent police and partner agencies.