https://www.valterlongo.com/wp-content/uploads/2018/02/upi-news-logo.jpg310384wpadminhttps://valterlongo.com/wp-content/uploads/2019/09/prof-valter-longo.pngwpadmin2015-06-22 15:07:582018-02-18 23:29:45Scientists say five-day fast-mimicking diet is safe