Complex sentence: Mills is a patron of Viva!, the Vegetarian and Vegan Foundation, vice-president of the Limbless Association and was formerly a Goodwill Ambassador for the United Nations Association Adopt-A-Minefield program.
Split into simpler sentences: Mills is a patron of both the Vegetarians' International Voice for Animals (also known as Viva!) and the Vegetarian and Vegan Foundation. Additionally, she is vice-president of the Limbless Association and was formerly a Goodwill Ambassador for the United Nations Association Adopt-A-Minefield program.