There is a scientific reason behind applying sindoor in Hindu culture. The spot on the forehead between the eyebrows, where the sindoor is applied, is a very important nerve point in the body. The significance of applying sindoor is associated with this spot in the body. In Hindu culture, the spot between the eyebrows is believed to be a very subtle energy point in the brain. It is known as ajna chakra, also known as the intuition center. Scientific experiments have also proved that this point is associated with the pineal and the pituitary glands, which control various functions of the body.
When sindoor is applied the point on the mid-brow region is pressed and this activates the energy point.
Applying sindoor opens the channel of intuition and it prevents energy loss. It also helps in improving concentration and helps in improving blood supply to face muscles.