Hair oil is a product that can be used to hydrate the scalp, promote hair growth, add shine, and decrease frizz. Some suggested ingredients for hair oil include squalene, caprylic/capric triglyceride, Persea gratissima (avocado) oil, Carthamus tinctorius (safflower) seed oil, Simmondsia chinensis (jojoba) seed oil, Vitis vinifera (grape) seed oil, Conditioner P7, Safflower Oil, Castro Oil, Jojoba Oil, Argon Oil, Tea Tree Oil, Black Currant Seed Oil, Mint Crystals, Pepper Mint Oil, and Cromollient SCE, and a blend of 18 all-natural oils and powders such as Neem Oil, Castor Oil, Macadamia Oil, Evening Primrose Oil, Vitamin E, Methi Extract, Tulsi Extract, and Brahmi Extract. Some ingredients that can promote hair growth and thickness include coconut oil, almond oil, olive oil, sesame seed oil, argan oil, black seed oil, bhringraj oil, and moringa oil. When using hair oil, it is important to massage it into the scalp and hair for best results.