Professional 12 hour fastAsk Dr. JDr. Russell Jaffe Ask Dr. J: Is a 12 hour fast enough? DrJ No Comments In this week’s edition of “Ask Dr. J”, Dr. Russell Jaffe is asked about whether or not a 12 hour fast is enough.Share this:FacebookXPinterestLinkedInRedditLeave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment *Name * Email * Website