Castor Oil for Hair Growth: Increases PGE2
Castor oil contains a high concentration of ricinoleic acid. This is the key to it’s effectiveness. Ricinoleic acid increases PGE2 in the scalp. PGE2 is a fatty acid, which seems to be vital for hair growth. Therefore applying castor oil to the scalp should increase PGE2 and increase hair growth. Let’s see how it works…
