Does hair oil contribute to hair growth?

Well there are many theories which state that hair oil contributes to hair growth. Now let's understand the science behind this.

Hair oils provide moisture to the hair, which is necessary for its growth in matters of length and volume.  A dry and frizzy scalp can cause hairfall. The moisture content of hair oils also helps in smoothening the hair and removing tangles which cause hairfall. Hair oils also contain cell repairing properties which repair damaged hairs. Hair oils also provide nutrients to the roots of the hair. Massaging of hair oil stimulates blood circulation and revitalizes the tissues causing hair growth. Massaging hair oils before using a shampoo and conditioner can help in balancing of moisture quantities.

But at the same time, the hair oil should be used in right quantity. Excess hair oil causes dirt which further causes hair damage. Use shampoo and conditioner on your hair after 30 minutes of oiling for best results.