Could this £7 horse shampoo give you a seriously gorgeous mane, just like Jen?

Mane N Tail, a product specifically for horses, counts Jennifer Aniston, Kim Kardashian and Sarah Jessica Parker as fans...

While it might not be your typical first choice of shampoo and it certainly won't look pretty on your bathroom shelf, Mane N Tail horse shampoo has overtaken L'Oreal to become the best-selling brand on Amazon.co.uk. And that's not because women are stocking up for their pet ponies.

Mane N Tail has become the shampoo of choice for celebrities including Demi Moore - but it's taken the rest of us until now to catch on. The brand has seen an increase of 175% in sales this year, leading Liberty to stock the animal product next to the big (human) beauty brands. Originally created to help keep show ponies' manes and tails strong and glossy, but when their owners started using the shampoo and conditioner on their own hair, to great results, word quickly spread.

Mane N Tail uses an exclusive micro-enriched protein formula that they say leaves the hair soft and shiny and is 'fortified with moisturisers and emollients that helps to provide body, shine and manageability for healthy-looking hair every time you shampoo'. Their website also claims the shampoo and conditioner will provide '“down to the scalp” cleansing action without stripping natural oils'.

But it's not just the makers that are making these claims. Users rave about Mane N Tail, saying the shampoo encourages their hair to grow faster and helps to make it thicker, shinier and stronger. Jennifer Aniston always name checks Mane N Tail when asked how she keeps that famous style looking so fabulous, which is reason enough to send us straight to Amazon.co.uk to pick up a bumper shampoo and conditioner duo for just £7.98.