Allergie alimentari, or food allergies, are immune system responses to certain foods. 

Most food allergies are caused by specific proteins found in

• Gamberetti - shrimps
• Granchi - crabs
• aragosta - lobster
• Noci - walnuts
• Nocciole - hazelnuts
• Arachidi - peanuts
• uova - eggs
• mandorle - almonds
• banane - bananas
• albicocche - apricots
• ciliegie - cherries
• pesche - peaches
• some spices and herbs, such as pepe nero - black pepper
• semi di finocchio - fennel
• coriandolo - coriander

To practise new phrases and pronunciation, a few lessons with private italian tutor (https://livexp.com/skills/italian) will do the trick. 

Inform your waitress or host of your dietary restrictions whether you are at a restaurant or when you are invited to a dinner party at their house by saying the following:

• Ho una grave allergia alimentare a… – I have a severe food allergy to…
• È molto importante che le pietanze non contengano… neanche in minima parte – It is crucial that the food does not contain even a very small amount of…

Avoid ordering fried food in Italian restaurants if you have a peanut allergy because the kitchen staff most likely uses a mixture of oils that may contain peanut oil.

The following items may be purchased at your neighborhood pharmacy to help with the symptoms of food allergies:

• antistaminico (antihistamine);
• cortisone (cortisone).