@turquoise-- Hey, I know the question isn't directed at me, but I thought I'd pitch in about beta carotene.
Beta carotene is an antioxidant that actually turns into a form of vitamin A in the body. It helps the body fight infections and is beneficial for rosacea because it will improve your immune system and should lessen symptoms like redness and inflammation that rosacea causes.
You can find beta carotene supplements but naturally, carrots are a great source for it. So are sweet potatoes, squash and spinach.
I'd recommend having more of these foods. I have seen carrot juice sold at supermarkets, in the natural juices isle. That is a good source of beta carotene. You could make it fresh at home if you have a juice maker. I don't have rosacea but I do enjoy having fresh carrot juice from time to time.