When Dr. Fung first started his protocol of IF to resolve T2D with patients, he didn't emphasize conversion to low carb; although, he indicates a preference for low carb. His objective was to get people used to IF to get the therapeutic benefits of that protocol, first. Over time, as low carb/ keto has become more more popular and wide spread, he has guided patients to find a healthy, whole food WOE that works for them while continuing with IF. I believe that's where he stands today. Many of his patients were and are still able to do IF/ TRE consistently and get benefits without radically changing their WOE.