One study found that participants that were on a low - zinc diet experienced a significant decrease in their metabolic rate. (fitnessandpower.com)
The obligatory decrease in metabolic rate while dieting is caused by you losing weight and burning fewer calories through movement. (completehumanperformance.com)
Conjugated linoleic acid (CLA) appears to prevent the decrease in metabolic rate associated with caloric restriction. (fitnessandpower.com)