Is it permissible to drink Non Alcoholic beer in islam.

Most of the non alcoholic beers contains a small percentage of alchohol. So that, It is not permissible to drink non alcoholic beer according to shafi madhab... According to hanafi madhab it is permissible to drink these kind of drinks only for treatment purposes, not for common use. whether, if it is made from dates or grapes then it should not be used for treatment also. Briefly, It is preffered to avoid these kind of non alcoholic drinks. 

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امام ابو حنيفة اور امام ابو یوسف کے نزدیک انگور اور کهجور کی علاوہ دوسری اشياء سے بنائی ہوئی شراب کو بطور دواء کے لئے يا حصول طاقت کے لئے اتني مقدار استعمال کرنا جائز ہے جس مقدار سے نشہ پیدا نہ ہوتا ہے      اسلام اور جدید معاشی مسائل ۱۱/۴

Non-alcoholic beer is four types-alchohol free beer which contains a maximum of 0.5% Alchohol, de alchoholiced beer which contains a maximum of 0.5% beer and low alchohol beer which contains a maximum of 1.2% beer. So, although non-alcoholic beer contains a lower amount of alchohol as compared to regular beer. It still isn't alchohol free 

(Times of India report, Fssai)