Ultimate Paleo Guide to Alcohol The article talks about Ciders which are typically good. Make sure to verify the label and "Also look for preservatives like potassium sorbate and sodium benzoate, both of which have been shown to negatively effect immunity. "
Potassium Sorbate - Beneficial Preservative or Harmful DNA Toxin? Is this preservative present in your "healthy" food? Unfortunately, it appears to be potentially harmful, especially when mixed with certain other ingredients, like Vitamin C. "Bottom line: If you can, try to avoid products using potassium sorbate as a preservative." More info: http://www.livestrong.com/article/353871-adverse-health-effects-of-potassium-sorbate/