Physiologically, I believe the science is that you produce less insulin, so you feel less hungry. Psychologically, because you feel less hungry, you eat less, which causes weight loss. I’ve done One Meal A Day dieting a few times, and it works for me. I can’t eat more than around 1500 calories at a time, so if that’s all I eat in a day, I lose roughly a pound a week. I can say that when I first started the diet, it was difficult because I felt hungry around my usual meal times. But as I kept going, I found that I just wasn’t hungry at breakfast or dinner time anymore, and would only be hungry around lunch time, when my one meal was. I usually eat at around 2pm.
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