Lack of iron means lesser oxygen to hair follicles leading to hair fall
Iron-rich food boosts hair growth but an overdose of iron can be problematic too

Vitamin D plays an important role in calcium homeostasis, immune regulation and cell growth differentiation.
Alopecia areata, a form of hair loss is generally seen in individuals lacking Vitamin D

Rosemary essential oil and aloe vera juice and gel help in thickening of hair.
Rosemary essential oil is generally used topically.

The Omega-3 fats present in Fish Oil can nourish the hair.
It also helps in hair thickening and reduces inflammation which can lead to hair loss.

Zinc benefits hair follicle health
It has been used for the treatment of hair disorders for a long time