The Optifast weight loss program is medically supervised, so it is generally safe for people who would benefit from significant weight loss. Part of the program consists of consuming only Optifast liquid meal replacements.
The Optifast meal plan is aimed at individuals with a body mass index of 30 or greater, indicating clinical obesity. The program promotes significant weight loss over a period of roughly 27 weeks. The program is medically supervised, and it is safe as long as individuals embarking on the Optifast program do so at the recommendation of a doctor. This program is not recommended for people pursuing minor or temporary weight loss.