November 2014: This guideline updated and replaced section 1.2 of NICE guideline CG43 (published December 2006). We reviewed the evidence in section 1.2 of NICE guideline CG43 and made new recommendations on very low calorie diets for adults, bariatric surgery for people with recent-onset type 2 diabetes, and follow up care after bariatric surgery. These recommendations are marked [new 2014].
We also made some changes without an evidence review to:
reflect changes to national core standards and service organisation, how blood glucose is measured, the definition of a very-low-calorie diet, use of BMI and z scores, and current practice to ensure safe prescribing
better reflect the needs of people with learning disabilities
improve alignment between recommendations for adults and children
include cross references to the NICE guideline on waist circumference, the 'Weight Wise' campaign, the NHS Choices healthy eating website, and the National Bariatric Surgery Register
remove 'life-threatening' and examples of severe life-threatening comorbidities, because they were considered by the Guideline Development Group to be unhelpful in clinical practice
remove reference to sibutramine because marketing authorisation has been suspended for this drug
highlight that the use of orlistat in children and young people is outside its marketing authorisation.
These recommendations are marked [2006, amended 2014].
Recommendations marked  last had an evidence review in 2006. In some cases minor changes have been made to the wording to bring the language and style up to date, without changing the meaning.
Minor changes since publication
February 2021: We updated the information on amounts of exercise in recommendations 1.6.1 and 1.6.4 in line with the 2019 UK Chief Medical Officers' physical activity guidelines.