<<Disclaimer: Verify this information before applying it to your situation.>> Just wanted to bring up the point that I am also highly reactive to petroleum products (tires,perfumes,fabric stores) and suspisious of injesting something that contains petroleum derivatives. My partner tells me that there is no pass thru chemically but tell that to people who react to rice syrup with barley malt (grain based) for a starter ( (I don't, that I'm aware of but avoid anyhow.)