Sisu, which means “inner strength” has its corporate headquarters in British Columbia, Canada. The company has been making quality, science and study based, health products for more than 30 years. Sisu products are created using the purest raw materials and uncompromised quality control testing, therapeutic formulas based on clinical research and with standards that exceed Canadian regulatory requirements. This ensures a product that is safe, premium and effective. They are conservative with expiration dating to ensure that their consumers always receive a full-potency, efficacious product. Their most popular products include Sisu Gentle Iron, Sisu B Complex 100 and Sisu Ester-C 1000mg.