Dr Pelz talks a lot about the benefits of an extended fast, autophagy doesn't really kick in until 24 plus hours (depending on the individual).

She suggested in another video a 12 hour eating window followed by a 36 hour fast, repeat. So....eat 7 am to 7 pm, fast from 7pm for 36 hours then eat again at 7am, repeat. I might try that next. But, pretty much stick to a 6-7 hour eating window now.