Hi Lisa Thanks for replying so quick. I don't think it's the vineagar but I'm not sure. Forever I've made oil and vinegar& spike and have done well with this. I love Blue ch. dressing so tried it I've been trying to find out what I am allergic to for about 6 weeks. The only thing in both that I have never really eaten is buttermilk. I have some blue cheese in a block so when i heal all the way , my feet are red and purple and my back and tummmy have a beautiful rash. I'm reading both bottles. But my mom said I may have eaten it for a long time and can suddenly get allergic. I was doing so good now I'm just fustrated. Thanks so much for your help. Esther