It is sufficient in the bowing position to recite "Subhana Rabbiyal-Adheem wa bi-Hamdih", or "Subhanallah" three times. It is also sufficient to recite any sort of "dhikr" that consists of praising Allah, like "Alhamdulillah" thrice, reciting Takbir thrice or reciting "La Ilaha Illallah" thrice, provided that the said is equivalent to "Subhanallah" three times. The same applies to prostration except that "Subhana Rabbiyal-Aala wa bi-Hamdih" is to be recited instead of "Subhana Rabbiyal-Adheem wa bi-Hamdih". But, it is not sufficient to recite, "Subhana Rabbiyal-Aala wa bi-Hamdih" in bowing, nor is it sufficient to recite, "Subhana Rabbiyal-Adheem wa bi-Hamdih" in prostration.
If it is doubted whether a prohibition applies to something or not, then it is permissible to consume it. If it is confirmed later that it contained meat products that are prohibited to consume, then it will be considered as najis, and anything it touches will be considered najis as well like any utensils or the mouth or the hands of the person that handled it. However, if it says ‘Suitable for vegetarians”, then this will indicate that there is no meat product in the product
It is reported in the narrations of the Ahlulbait (peace be upon them) that their knowledge is of two kinds: one is the inherited books from Imam Ali (peace be upon him) that he wrote down from the dictations of the Messenger of Allah (peace be upon him). The other kind is the information that they need in their everyday life which they get from Almighty Allah.