Well if Muslims and people from some other cultures can do fasting, and they still manage to live long and healthy like any other culture - why not try this met

Well if Muslims and people from some other cultures can do fasting, and they still manage to live long and healthy like any other culture - why not try this method to actually loose weight and then pick for example Japanese diet to maintain it? I think all this fasting is for self control rather than long term process. You teach your body and mind to say "no" to nasty foods and snacks.