1. Where is Wyeth milk powder produced? Wyeth milk powder is a popular infant formula, but many people don\’t know where it is produced. In fact, Wyeth milk powder has multiple production bases, including the Netherlands, New Zealand, the United States and. 2. Wyeth milk powder production base in the Netherlands The Netherlands is one of the largest dairy producing countries in Europe, so Wyeth chose to establish its own production base here. This base has advanced technology and equipment to ensure the production of high-quality milk powder