Sir Mick Jagger is eating avocados and goji berries to make himself more fertile. The Rolling Stones rocker is reportedly so desperate to have a baby with his long-term girlfriend L'Wren Scott he has completely changed his diet.

The 64-year-old musician has incorporated large quantities of avocados - which Aztec people believed improve men's sex lives and prowess - into his diet, and drinks a glass of goji berry juice - dubbed 'Fruit Viagra' - every day.

The expensive Himalayan berries - one litre of the juice can cost up to £30 - are reputed to contain life-enhancing properties following reports of a Chinese man who drank a glass of the nectar daily lived to be 250.

Acupuncturist and nutrition expert Laurie Morse is quoted as saying: "Nutrition is our body's fuel - therefore, it is not optional that we provide our system with proper nutrients, if we are to enjoy health, balance and fertility.

"When trying to conceive, we must shift our perspective from short-term, taste bud gratification to nutritional choices that provide preventative and long-term internal health and support."

Mick is also said to be worried about his looks deteriorating as he grows older, and uses the hugely expensive Crème de la Mer face cream - which costs £150 per pot - along with a Kanebo moisturiser containing silk every day.

Mick already has seven children - Karis, 37, with ex-girlfriend Marsha Hunt, Jade, 36, with first wife Bianca Jagger, two daughters, Elizabeth, 23, and Georgia, 14, and two sons, James, 21, and Gabriel, 10, with second wife Jerry Hall, and one son, Lucas, eight, with ex-girlfriend Luciana Gimenez Morad.