A teacher lost 4 stone of weight just by eating each meal of the McDonalds for six months continuously.
It has been reported that the science teacher John Cisna, from Iowa, US, started eating the McDonald’s all meal as a class experiment.
But when at the end of three months he found that he had lost his weights.
He thought to continue the habit, and ended by losing 4 stone at the end of six months.
And the company was so impressed they made him a brand ambassador.
John later said in a talk “my achievement proves that there are healthy options at these restaurants”.