Simon Cowell has vitamin shots during meetings

Simon Cowell is so determined to stay healthy, he regularly receives vitamin shots during business meetings.

The former American Idol judge admits he takes vitamin B12, magnesium and vitamin C supplements to improve his wellbeing - and he still insists on receiving the "calming" remedies when he's busy.

He tells GQ magazine, "Even when I'm having a viewing session with producers, she (his assistant) just sticks the needle in me and we carry on whatever we are doing.

"It's an incredibly warm feeling. You feel all the vitamins going through you. It's indescribable but very calming. Everyone I've recommended it to has absolutely loved it."