I’m not going to write the entire essay for you, but I will certainly give you some starting sentences and topics to talk about.
As you are required to argue both sides of the topic, you should begin with a sentence that sums up your point and shows that you’re about to argue for and against. Maybe something like; Nutritional information is incredibly helpful in allowing consumers to make informative health choices about their food but it also presents many negative consequences that must be considered.
In your first paragraph, talk about how nutritional information is good because it allows consumers to understand what they are putting in their bodies and to make informed choices about what they eat.
Then say it is problematic as, for some restaurants and fast food establishments, their ingredients vary and providing nutritional in would mean the menus are subject to constant change. Some restaurants alter the ingredients in their dishes according to availability and chef, providing nutritional information is therefore something that requires more thought.
Then argue again that nutritional information is good because it allows for those with allergies to quickly decide if the dish will be ok for them.
In your conclusion, perhaps say that nutritional information is something offering many benefits but requires more thought than initially suggested.
Make sure when writing use examples, you’ll have to think of these yourself. Try to think of how these problems would occur in real life and how they back up your claim.
Good luck