Suntory Hy! WATER LOCK™ is a technology developed by Suntory Japan, designed to help retain water in the body for longer. It is based on the concept of Hydration Science—Suntory Japan’s in depth research into how the body absorbs water. The research shows that effective hydration is not determined by quantity alone, but by the right balance of minerals and an optimal level of osmolality, which supports efficient absorption by the body.

For this reason, the WATER LOCK™ formula has been carefully developed with a balanced ratio of sodium and sugar, helping support faster water absorption and allowing the body to retain moisture longer than drinking plain water alone. The formula is further enriched with niacin (vitamin B3) and a refreshing yuzu flavor, making it easy and enjoyable to drink throughout the day.

Designed for urban lifestyles—especially for those who spend long hours in air conditioned environments—Suntory Hy! WATER LOCK™ helps address invisible water loss that can occur without you even realizing it.