I have had a mild case of rosacea for twenty years very easily controlled with metrogel. In January 2017 very intense burning flushing began. I read everything I could on the Internet to stop it. Drinking ACV stopped it temporarily until I ate anything. The rosacea completely cleared in 24 hours when I stopped taking the multiple vitamin that I had taken every single day for the past three years. My advice to you is to stop all supplements for a few days to see if it makes a difference. On a side note, the ACV has dramatically helped my allergies and those of my best friend as well. I came back to add this information in the sincere hope it will help someone.