Inhibition of hydroxycinnamoyl-CoA thioesterases in ginger (Zingiber officinale Rosc.) and turmeric (Curcuma longa L.) by lipase inhibitors

► Orlistat inhibits plant hydroxycinnamoyl-CoA thioesterases. ► β-conglycinin peptides inhibit plant hydroxycinnamoyl-CoA thioesterases. ► Multiple hydroxycinnamoyl-CoA thioesterases exist in ginger and turmeric.