The singer/actress, 19, sparked fears last week when she was snapped looking skinny as she jogged with her dog in California.

She fuelled speculation when she posted a photo of herself smelling, but refusing to eat, fast food on Twitter.

Miley wrote: “I can’t eat it. So I’m just gonna smell the s**t out of it! My mouth is literally watering.”

Her upload triggered a torrent of accusations that she has turned to extreme dieting to keep the weight off.

However, she’s been quick to lambast such claims, insisting her fast food snub was due to medical and health reasons.

She tweeted: “For everyone calling me anorexic I have a gluten and lactose allergy. It’s not about weight it’s about health.

“Gluten is c**p anyway!… I ate today at Easter lunch but all of it was healthy and even more fulfilling! Health is happiness!”

Furthermore, Miley urged her fans to cut gluten out of their diets and reap the rewards.

She wrote: “Everyone should try no gluten for a week! The change in your skin, physical and mental health is amazing! You won’t go back!”