Skipping meals to eat just one or two a day (like OMAD or 16/8 fasting) isn't inherently "bad" and can aid weight loss or metabolic health for some, but it risks nutrient gaps, muscle loss, and isn't suitable for everyone.
Potential benefits
One meal a day (OMAD) or two meals often creates a calorie deficit for faster fat loss, potentially improving insulin sensitivity, blood sugar, and inflammation markers without strict food rules.
Two larger meals (e.g., breakfast/lunch) may outperform frequent small ones for weight loss, liver fat reduction, and glucose control in type 2 diabetes patients, per randomized trials.
Autophagy (cell repair) and simplicity appeal to many, with cohort studies linking fewer meals to lower BMI in some groups.
Key risks and downsides
Extreme versions like OMAD spike hunger (via ghrelin), fatigue, irritability, and blood sugar swings; small studies show higher LDL cholesterol or insulin delays.
Nutrient deficiencies loom if meals lack variety—hard to hit protein/vitamins in one sitting—risking muscle loss, malnutrition, or disordered eating like binges.
Not ideal for pregnant people, diabetics on meds, athletes, or those with eating disorders; long-term sustainability is low for most.
Who should avoid it
Steer clear if you have low blood sugar, high activity, or medical conditions; women may face hormonal disruptions. Start gradual, prioritize nutrient-dense foods (veggies, proteins, fats).
Consult a doctor—evidence favors balanced calorie restriction over extremes for most.
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