I thought this part was interesting:

"Intermittent fasting should not be confused with habitual skipping of meals, e.g., always skipping breakfast; habitual and consistent meal skipping actually causes weight gain. If you skip meals, do so in an unpredictable and random pattern, so that your body does not adjust and ratchet down its metabolic rate."

Not sure Jason Fung has addressed this idea of randomness and the body adjusting, but it might make sense.

Earlier someone mentioned that losartan causes weight gain, but I don't see that on this list here.