Usage will vary depending on the extent of the thinning area. THK Hair Building Fibres are currently available in a bottle of 25g which the typical customer can apply approximately 30-50 times. However, if the area is smaller customers have informed us that even when used daily, the bottle will last up to three months.  When the usage of THK Hair Building Fibres is compared with other similar products, it lasts longer, this is due to the innovative dispenser and the exceptional way THK Hair Building Fibres bonds with existing hair.