New research is showing a big factor in obesity is leptin resistance. Leptin is a hormone released by the body to not only trigger the feeling of being satiated and full, but also signals to the body that it’s had enough food. When your mind isn’t getting the signal that it’s full, you keep eating or eat more often. When your body doesn’t get the signal it’s had enough food, it stores most all calories it takes in because it feels like it may be in starvation mode.
Edit to add there is research that found a few specific genetic mutations that likely contribute to leptin resistance, these mutations can be both inherited or spontaneous.
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