A shop in the Gyadi-Gyadi area of Kano, Nigeria sells multiple wares, including a health product called Waterguard. Waterguard is a chlorine-based product that makes water safe to drink and is distributed by the Nigerian NGO, the Society for Family Health (SFH), through social marketing. SFH is the largest indigenous NGO in Nigeria and is the Nigerian partner of the US-based international NGO, Population Services International.