https://en.wikipedia.org/wiki/Pistacia_lentiscus

This relative to Pistachio produces a beautiful resin that has been used as a mastic gum by Mediterranean civilizations to reduce stomach acid, freshen their breath and as antimicrobial to fight cold and flu. Its oil is mainly used to help relieve varicose veins pain and as a lymphatic decongestant thanks to its vasoconstrictive properties.