By day five, he noticed a small breakthrough: distinguishing true hunger from habitual cravings. Drinking water or black coffee helped curb appetite, and by the end of the week, he’d lost 3.8 lbs. Still, Tennyson called the experience “extremely difficult” and admitted it wasn’t sustainable for him—or likely for most people.
How OMAD affects your body
When you eat, carbohydrates turn into sugar in your bloodstream. Extra sugar triggers insulin, which stores surplus energy as fat. During fasting, insulin drops, prompting the body to burn stored fat for energy—a process that takes time.
Studies suggest OMAD may help with weight loss and improve metabolism, but research is limited. Some people report increased alertness and potential benefits when fasting overnight. However, there are risks. A 2022 study found OMAD linked to higher overall mortality and cardiovascular risk. Blood sugar spikes, elevated cholesterol, and higher blood pressure are additional concerns.
Doctors warn that OMAD can cause nausea, dizziness, low energy, irritability, and constipation. Discipline is key, and results may not be better than simply reducing calories.
If you’re curious about OMAD, consult a healthcare professional before trying it—especially if you have underlying health conditions. Extreme diets aren’t one-size-fits-all, and your safety should always come first.
Thinking about trying OMAD? Talk to your doctor and consider whether a one-meal routine fits your lifestyle before taking the plunge. Share your experiences and tips below!