Olive oil is an excellent source of antioxidants. [8] A combination of olive oil and essential oils ensure a healthy scalp. It also promotes the growth of healthy and luscious hair. Use this serum recipe overnight for an intense treatment or during the day over clean dry hair. A lot of personal care products contain the list of ingredients that you can barely pronounce or read and most of them are made of harmful chemicals and toxic materials. Lavender oil helps with moisturizing the scalp and balancing sebum secretion. Massaging the serum into the scalp promotes hair growth, discourages hair loss, and boosts blood circulation. DIY Hair Growth Serum Recipe. Try this recipe if your hair is thinning or you have hair loss patches. Homemade DIY Hair Growth Serum To Stimulate Hair & Stop Hair Fall. For this remedy, you will need a ¼ cup of olive oil, 5 drops of rosem… It works on a disturbedscalpand prevents it from further damage. It looks very promising because the ingredients I have used are effective to stimulate hair growth. This DIY hair growth serum is a combination of different essential oils that help in hair growth by making it long and radiant. After using this serum for a few months it will become smoother, stronger, and healthier. 17.9K shares.