As good as theory as any. That's why I say "negative reaction" instead of allergic. Not sure why, just the fact that there are more complaints. And, as a source, the more customers you have the more complaints. For instance, if 2% of your customers have bad pip and you have 100 customers. That's a fair amount of complaints. Now imagine you have 300 customers with the same percentage of complaints. 3 times the complaints. Then imagine you use a carrier oil with 3 to 4% customers with pip. Now it seems like, on a forum thread, like everyone is complaining but it's only 3%. It's important to find the best option for a smooth product to the masses.