Head Spa Calmm ensures the cleansing and massage of the scalp, leading to the removal of excess sebum and dirt from the pores, while promoting blood circulation and relaxation. The effects of Head Spa also reduce unpleasant odors, improve the supply of nutrients to the scalp, prevent hair loss, and result in fuller, voluminous hair. The scalp produces the most sebum in the human body, as it has twice as many sebaceous glands as the so-called T-zone of the forehead and nose. Even when using shampoo, remnants of sebum remain in the hair, even if you think you’ve washed thoroughly. The remaining sebum oxidizes upon contact with air, emitting an unpleasant odor and hardening into a deposit that cannot be removed by shampoo. When sebum oxidizes, it turns into lipid peroxides, leading to sticky sebum. Consequences include scalp issues such as odor, dandruff, itching, and thinning hair.