Personally, I used EOS in Passionfruit for a week in 2011. I remember it very clearly because I thought the balm smelled fantastic. It went on smoothly and I thought I had a winner. By the end of the second day, I noticed my lips felt tight. Must not be using enough lip balm. The third day, my lips felt rough. Four days into using the EOS lip balm and the skin started peeling off my lips. I finally came to my sense and stopped using the EOS. My lips continued to suffer despite emergency applications of oil lip rescue products. They eventually cracked and started bleeding. It took a month for my lips to heal themselves. I've always taken very good care of my lips and have never experienced anything like my reaction to EOS before or since. I currently use lip balm from 100% Pure.
According to the EOS website, this is the current ingredients list for their standard lip balms. Nothing really jumps out at me except for the Linalool. Perhaps reactions to the fruit acids?
Olea Europaea (Olive) Fruit Oil*, Beeswax (Cire D'abeille)*, Cocos Nucifera (Coconut) Oil*, Simmondsia Chinensis (Jojoba) Seed Oil*, Natural Flavor (Aroma), Butyrospermum Parkii (Shea Butter)*, Stevia Rebaudiana Leaf/Stem Extract*, Tocopherol, Helianthus Annuus (Sunflower) Seed Oil*, Vaccinium Angustifolium (Blueberry) Fruit Extract*, Fragaria Vesca (Strawberry) Fruit Extract*, Prunus Persica (Peach) Fruit Extract*, Linalool**. *Organic. **Component of Natural Flavor. Certified Organic by Oregon Tilth.
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Read the lawsuit details EOS Class Action Lawsuit Filing.