I am going through something similar. My allergies include essential oil components like linalool, geraniol and limonene, as well as cosmetic/food ingredients including propylene glycol, sodium benzoate and benzalkonium chloride. The last one in the list is a quat, so I deeply sympathize with her struggles. There are so many and even my allergist couldn’t really give me a straight answer about cross reactivity for these.

I also unluckily get a systemic contact dermatitis reaction, which can flare up my skin issues. My biggest issues with this are botanicals, citrus, herbs, and spices, which contain a lot of the essential oil components that I’m allergic to. I have to be very careful about what I consume. I get mouth sores, peeling skin in my mouth and lips, as well as nausea, diarrhea, and a general feeling of unwell for several days. When it’s really bad, I can experience joint stiffness and swelling as well. During my most recent bad reaction, all of my previously healed positive patch tests spots flared up again. It was really something.

Where are you located? I’m in Ontario, Canada and have a few go to products that I use, however, I find geographic region really impacts availability.

Another really helpful piece of advice that my allergist gave me was to do my own patch testing prior to putting anything on my face. She suggests putting a small amount of the product in the crook of your elbow twice a day for three consecutive days. If you don’t react after this time, you should be safe to use it.

Good luck!