Kwai Blood Pressure At the heart of a healthy life is a healthy heart Kwai Blood Pressure is a blend of nutrients specifically selected to help maintain normal blood pressure and heart muscle function. Each tablet contains a high dose of Magnesium, a mineral substance necessary for life and required for the maintenance of normal muscle contraction, including the heart muscle. In addition, Kwai Blood Pressure delivers Potassium, which plays an important role in maintaining muscle function and contributing to the maintenance of normal blood pressure. Vitamins B6, B12, Iron and Magnesium also contribute to the reduction of tiredness and fatigue.