"Ginkgo biloba" leaves and sarcotesta also contain ginkgolic acids, which are highly allergenic, long-chain alkylphenols such as bilobol or adipostatin A (bilobol is a substance related to anacardic acid from cashew nut shells and urushiols present in poison ivy and other "Toxicodendron" spp.) Individuals with a history of strong allergic reactions to poison ivy, mangoes, cashews and other alkylphenol-producing plants are more likely to experience allergic reaction when consuming non-standardized ginkgo-containing preparations, combinations, or extracts thereof. The level of these allergens in standardized pharmaceutical preparations from "Ginkgo biloba" was restricted to 5 ppm by the Commission E of the former Federal German Health Authority. Overconsumption of seeds from "Gingko biloba" can deplete vitamin B6.