Using the best ingredients available, you can expect to receive high grade and top quality E-Juice liquid. All of our E-Juice liquid contains 100% U.S. sourced, USP-Grade (pharma/food grade) ingredients. There is absolutely no food coloring added. Variance in color and slight changes in color occur naturally in flavor and/or a specific flavor's natural reaction to nicotine. The blend is 80% VG (vegetable glycerin) and 20% PG (propylene glycol) along with the added nicotine and flavors. We also find a lot of people like to mix combinations of flavors and or various nicotine strengths to fit their personal preferences. We appreciate your feedback and ratings and are here to answer any questions you might have to ensure your guaranteed satisfaction with our products and offerings.