Several studies report changes in nutrient adequacy with caloric restriction. However, the extent of nutrient inadequacy and the nutrients affected are dependent on the composition of the diet followed, as well as on the nutritional needs of the individual. Limited research reports reductions in nutrient adequacy with weight loss through an energy restriction of at least 500kcal per day or consumption below 1,200kcal to 1,400kcal per day. Additional long-term studies in this area are needed.
Grade II Overall strength of the available supporting evidence: Grade I - good; Grade II - fair; Grade III - limited; Grade IV - expert opinion; Grade V: not assignable