Limonene: Citrus (orange, tangerine, lemon, lime, grapefruit), rosemary, juniper, peppermint.
Found to repulse predators. Found in the rinds of many flowers and fruits. With the presence of other specific Terpenes, Limonene can be anti-bacterial, anti-fungal, anti-depressant as well as anti-carcinogen. Limonene synergistically promotes the absorption of other Terpenes by quickly penetrating cells on the membrane level, resulting in an increase in systolic blood pressure. Since Limonene is such a potent anti-fungal and anti-cancer agent, it is thought to protect against aspergillus fungi and carcinogens found in the cannabis smoke stream.