Women now have another weapon to help fight the flab in the form of a new range of anti-cellulite leggings and tights.
The Brazilian manufacturer of Scala bio-fir claims the garments will melt away bumpy excess fat.
When underwear made by the same company went on sale in John Lewis in May it was the store's fastest selling lingerie yet, going at a rate of 25,000 pieces a month.
Sleeker silhouette: The Scala bio-fir tights and leggings (£15) zap toxins and fat with in-built thermal crystals which claim to increase blood flow
Now the chain is selling leggings and tights made by Scala, which are embedded with crystals which emit heat on contact with the skin.
This is supposed to improve blood flow and therefore help drain away toxins and fat.
The active Bio Crystals built into the microfibre of the fabric absorb body heat and stimulate cell metabolism increasing blood flow to the skin.
Research carried out on the Skala sister product, the Bio-Fir Anti-Cellulite knickers, showed that four out of five women who wore the knickers every day for a month lost inches from their stomach, hips and thighs.
Cellulite was also reduced. The effects are said to last up to 12 months, provided wearers exercise and eat healthily.
John Lewis' managing director Andy Street said: 'Scala hosiery has the potential to break records as one of the fastest selling products John Lewis has ever stocked.
'Scala control-wear caused a sensation when we launched it in May and I believe the hosiery will do even better as it will appeal to a wider audience.'
The leggings are available now online or at the chain's Oxford Street store in London, while the tights will go on sale across the country in October.
Both the products are black, cost £15 each and the manufacturers says the fat-busting technology does not diminish with washing.