I take really good care o fmy skin
Yes, so do i. It entails practices that support skin integrity, enhances it's appearance and relieves skin conditions. 
I use a wonderful product called skin food which is made with west indian limes
I've never heard of that. I do know that you can have great skin by not only using that product, but nutrition and avoidance of sun exposure helps as well. 
Plenty of fresh fruit and hydration is very worthwhile. I find it intriguing that they can find so many weird ingredients, I have one with snail oil!
That is weird. I wonder if that falls under the FDCA that defines cosmetics as products intended to cleanse or beautify the skin. 
I have no idea, I'm not a pharmacist! But I do have lovely soft skin!
That's good. Continue those practices and it will enhance your appearance for years to come.