There are some groups for whom the OMAD diet might be useful. There are studies to suggest it can help improve metabolic syndrome and control diabetes. However, because of the risks associated with this type of diet, you shouldn’t consider OMAD without first discussing it extensively with your healthcare provider. The OMAD diet is never recommended for pregnant or breastfeeding women, children, teenagers, seniors, or people with eating disorders. It may also be unsuitable for athletes or people who exercise extensively, as it may not provide the energy needed for intensive workouts.