Top spot: The new Aldi serumIt was hailed as the most effective anti-wrinkle cream on sale - and was so popular it had to be rationed.
But now Boots Protect And Perfect anti-ageing serum has been kicked into second place by a rival costing a fraction of the price.
Aldi's Lacura Multi-Intensive Serum is better than Protect And Perfect at reducing the appearance of wrinkles, according to a study.
The serum is one of the cheapest around but beat 2,000 rival products in a series of blind tests.
The Boots Protect And Perfect Intensive Serum came second.
At £20.50, the Boots serum is six times more expensive than the Aldi version, which costs £3.49.
The Boots serum sold out in hours after scientists on the BBC's Horizon programme found it worked better than expensive rivals.
When more supplies were sent out, several stores opened at 7am to cope with the massive demand and restricted customers to one bottle each.
At one point, the 30ml bottles were changing hands for up to £75 on eBay.
The signs are that Aldi's serum will be just as popular. Sales have soared by 2,150 per cent over the past month with many stores selling out.
Women who tested the product said they noticed dramatic results in weeks.
Christine West, a 58-year- old from Sheffield, said: 'I noticed wrinkles reducing in the third week.
'All of a sudden my face just looked younger. My hairdresser remarked on the difference - I was delighted someone noticed.'
Aldi claims the serum's combination of shea butter, macadamia nut oil and vitamins C and E smooth out wrinkles and improve the elasticity of the skin.
A £1.99 face cream in the supermarket chain's same range is also selling out fast after coming top of its class.
Sales of the Lacura Shimmering Day Cream, which claims to make skin look more even and radiant, are up by 1,581 per cent.
Boots's £15.50 version, No7 Instant Radiance Beauty Balm, was once again knocked into second place in the survey, which was carried out by Celebs On Sunday, the Sunday Mirror's magazine.
The survey was carried out by 1,000 women who tested 2,000 products.
All of the creams were put into plain containers and each product was tested by ten different women.
The women were asked to mark each product out of ten.
They were asked whether they had noticed an anti-aging benefit, whether friends and family had noticed any difference, and whether they would buy the product again.
source: dailymail