The secret lies in their use of oils, especially the combination of oils followed by a shikakai rinse.
For example, coconut oil penetrates the hair and castor oil seals the hair.
Scientific proof
Scientific studies confirm that scalp massage promotes hair growth ( Koyama et al., 2016 ; Ghavamai et al., 2020 ).

Also Mishra et al., 2024 shows that the combination of oils applied in massage on the scalp and hair, promotes hair growth and gives thick and shiny hair.
But applying oil to your hair and scalp may not be ideal for everyone.
Here are 3 reasons:
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If you have oily hair or dandruff, applying oil to your scalp can make it worse.
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The application time is long and the hair looks greasy.
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Oils do not moisturize because they are fatty substances (water-loving ingredients moisturize, called humectants)
Hair care inspired by India
If you want to benefit from hair growth through Indian hair care routine and avoid the inconveniences that come with it, you need a lightweight hair care product with combinations of humectants and oils.