What are the best carrier oils for hair growth and thickness? Carrier oils such as castor oil, argan oil, and jojoba oil are excellent for promoting hair growth and thickness. HBNO offers a range of carrier oils that can nourish the scalp and hair for healthier, thicker locks. https://www.essentialnaturaloils.com/blogs/natural-essential-oils/how-to-mix-essential-oils-for-hair-growth-and-thickness