Methoxsalen is a naturally occurring photoactive chemical found in the seeds of the Ammi majus (Umbelliferae) plant and in the roots of Heracleum candicans. It belongs to a group of compounds known as psoralens or furocoumarins. https://medium.com/@herbl3926/meet-shilajeet-boost-vitality-performance-naturally-a854bef6a08f