What hair straightening products can I use if I’m allergic to most of them?

Hello! This might be a little long but please help! So I’ve always straightened my hair and I’ve never had a problem with allergies in my life. I’ve been using the OGX Brazilian Keratin Therapy shampoo and conditioner for a long time how on the days I straighten my hair. After that I put in the Garnier Fructis Sleek and Shine leave in conditioner, and then finally I just use the Suave Moroccan styling oil and suave keratin infusion serum for extra shine and hold. These products have always worked perfect for me and give me the stick straight look I like. But lately I’ve been getting eczema on my hands after I do my hair and come to find out I’ve developed allergies to a lot of ingredients they put in most shampoos! :(

Most of the ingredients that I react the worst to are any kind of sulfate or silicone or alcohol. And a few other ingredients like

Methylchloroisothiazolinone
Methylisothiazolinone
Cocamidopropyl Betaine

….so my question is is there any more natural
hair shampoos and products I can use to get the straight hair I want without so many irritating ingredients? Or at least not as many bad ingredients? I never realized that everything I use is FULL of these ingredients and my body must have just had enough of it!

I’m sorry if this is a bit complicated but I’m not really a beauty guru and I’ve used the same hair products as long as I’ve been straightening my hair! Lol :)

I’ve also been told to just leave my hair naturally curly but I really don’t want to. Please help! :(