Actually, science says he's right. You should fast at least 16 hour per day.
I've never seen this were have you read that ?
For exemple
https://www.annualreviews.org/doi/10.1146/annurev-nutr-071816-064634?url_ver=Z39.88-2003&rfr_id=ori%3Arid%3Acrossref.org&rfr_dat=cr_pub++0pubmed#_i24
16/8 is the most common intermittent fasting protocol for begginers. 20/4 is recommended in case of autoimmune disease, to reverse leaky gut and insulin resistance.
Actually, science says he's right. You should fast at least 16 hour per day.
I've never seen this were have you read that ?
For exemple
https://www.annualreviews.org/doi/10.1146/annurev-nutr-071816-064634?url_ver=Z39.88-2003&rfr_id=ori%3Arid%3Acrossref.org&rfr_dat=cr_pub++0pubmed#_i24
16/8 is the most common intermittent fasting protocol for begginers. 20/4 is recommended in case of autoimmune disease, to reverse leaky gut and insulin resistance.