The book was written 15 years ago (in French) remember, and his advice has changed over the years, initially using the experiences of the people who consulted him in his surgery, and now the official online websites. 5PP / 5PV is a good rhythm only for people in morbid obesity. Otherwise, he says he notices very little difference in weight loss with 1PP / 1PV (and our intestines thank him sincerely for that!!).
Good luck and remember to keep your protein levels high on PV days.