This source may not be considered credible because recommending eating only once a day goes against commonly accepted nutrition guidelines, which emphasize the importance of balanced meals throughout the day to provide the body with necessary nutrients. Additionally, information from popular bloggers may not always be supported by scientific evidence or professional expertise.

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This source might not be reliable because it suggests eating just once a day, which is not what experts recommend. They say it's better to have balanced meals all day long to give your body all the important stuff it needs. Also, what popular bloggers say may not always be backed up by science or professionals who know their stuff.