The retailer will launch a GI Guide diet book in-store in January to target post-Christmas dieters, with 65,000 copies hitting the shelves priced £3.99 each. The book will be serialised in The Sunday Times.
Tesco claims GI has the 'power of the Atkins brand, while promoting sensible eating'. It plans to have 1000 own-brand products bearing GI labels by the end of 2005.
Tesco head of diet and health Hamish Renton revealed that a number of manufacturers were interested in using the GI symbol. 'We want it to become an open system,' he said.
Tesco has invested at least £2m in trials - it costs about £2000 a product to measure levels of carbohydrates based on their effect on blood-sugar levels.
Renton added that there had been initial discussions with high-street bookstores about stocking the GI Guide to broaden awareness.
The GI diet, which is endorsed by Olympic gold medallist and diabetic Sir Steve Redgrave, will be promoted through point-of-sale activity and leaflets. There will also be staff trained to give advice on the diet at Tesco's 230 pharmacies.