JAMIE Oliver said he has “never been more depressed” about the state of child health across the globe.

The TV chef spent Food Revolution Day leading a seven-hour cooking broadcast on social media. He was joined by celebrities including pop star Cheryl, who visited his cookery school in London to work on her kitchen skills.

The Food Revolution aims to highlight a global nutrition crisis amongst children.

Oliver said: “Right now if you look at under five-year-olds, 41 million are obese or overweight, and in parallel 159 million kids are malnourished and not growing physically and mentally in the right way. It’s 2016, we can’t be proud of that.

“In a funny way the last 40 years has been interesting. We have seen public health go from amazing to terrible.”

He added: “I’ve never been more depressed about child health globally.”

Oliver, 40, recently triumphed in his campaign for a sugar tax on fizzy drinks.

The Government pledged a new tax on sugar-rich fizzy drinks from April 2018.

The chef said: “Spending a year and a half telling a story about the logic of a tax is not great, you’d probably say you’re bloody mad.”