What evidence is there for this statement? What is considered "fasting?" I can't see how a 12-hour feeding window would be problematic. I could understand some people might develop "disordered eating" if their approach is unsustainable, but "more harm than good" isn't true for those that can do it.
One reason for fasting is that it improves insulin sensitivity.
From: https://www.health.harvard.edu/blog/intermittent-fasting-sur...
"Based on this, researchers from the University of Alabama conducted a study with a small group of obese men with prediabetes. They compared a form of intermittent fasting called "early time-restricted feeding," where all meals were fit into an early eight-hour period of the day (7 am to 3 pm), or spread out over 12 hours (between 7 am and 7 pm). Both groups maintained their weight (did not gain or lose) but after five weeks, the eight-hours group had dramatically lower insulin levels and significantly improved insulin sensitivity, as well as significantly lower blood pressure. The best part? The eight-hours group also had significantly decreased appetite. They weren’t starving."
