Nutra-Life Kyolic® Aged Garlic Extract™ Immunity Shield combines proprietary Kyolic® Aged Garlic Extract™ with Vitamin C, Vitamin D3 & Zinc that may support and maintain a healthy immune system. Kyolic® Aged Garlic Extract™, is sourced from organically grown garlic; and then aged for up to 20 months. The unique Kyolic® aging process converts the oil-soluble, harsh-smelling, sulfur-based compounds in raw garlic into a range of water-soluble, odourless ones. These compounds are responsible for the unique properties of Kyolic®, and are also the reason that the extract is gentle on sensitive stomachs.