I'm looking for the healthiest, cheapest flavoring that is available (healthier over cheaper preferably). So if you could all give me some links to flavor companies/websites/third-party sites that have little-to-no carcinogens. I've read the cheaper pre-made juices can have high amounts of carcinogens and you can't fully customize your PG/VG ratios with pre-made. Organic or natural would be preferred, but I understand that may not be available since those are made from extracting oils (which now I know oil-derived flavors are not good).