Olive a fruit that is primarily grown and cultivated in the Mediterranean region and its oil’s primary chemical elements are oleic acid, palmitic acid, and squalene. Olive oil can reduce flakes caused by dandruff and also help remove head lice. Olive oil moisturizes your hair and reduces scalp irritation, which further reduces dandruff because of its antibacterial and antifungal properties. And it unclogs the clogged follicles. These clogged follicles and dandruff are one of the major contributing factors to hair loss.. "In certain regions of the world, olive oil has been used in soap making as well as directly applying to hair and skin for thousands of years," says Birnur Aral, P.h.D., director of the Health, Beauty & Environmental Sciences Lab. "the claimed cosmetic benefits of olive oil for hair care range from preventing dandruff to softening and conditioning via DIY masks which are left on hair for half hour to several hours and then rinsed off."