It is normally easy to identify if a food product is suitable for vegetarians because of the much-recognised "V" symbol. As a Muslim, I often select such products, only to read the ingredients list and discover that they contain alcohol, the consumption of which is forbidden in Islam.
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It would make life so much easier and would mean less time running through every ingredients list on every food product whilst shopping, if there was a mandatory identifying label for alcohol such as "A". This would be useful for anyone who does not wish to consume alcohol in any form, but in particular for Muslims.