1. Warnings for Bergamot: Due to bergapten, Bergamot can be photosensitizing, causing abnormal skin pigmentation when used externally by sensitive individuals who then go out in the sun

2. Furanocoumarins are a subgroup of phenolic compounds included in the coumarins group. They can be subdivided into two types: linear, generically known as psoralens, among which are included psoralen, xanthotoxin, and bergapten, and angular, generically known as Angelicins, including angelicin, sphondin, and pimpinellin.