The world’s thinnest woman, Valeria Levitin, weighs just four stone after years of extreme dieting, a fraction of her healthy weight.
At 5ft 8in, she should weigh between 9st and 12st, according to NHS advice. Despite her emaciated figure, Levitin urges girls not to aspire to matchstick-thin bodies, emphasizing the need for a wake-up call.