South Africa-based private equity group RMB Corvest and South African investment holding company Zico Capital have jointly purchased a 25 percent stake in Nigerian food company Vital Products. The value of the transaction is not disclosed. Vital began operations in 1999 as a manufacturer and distributor of fruit drinks and non-alcoholic beverages, but has since expanded its product portfolio. The funding will be used to expand the company’s operations, including through the purchase of a new factory building.