Nettle leaf is a rich source of antioxidants, which are needed for reducing the number of free radicals in your system. Vitamin C, for instance, is a powerful aid to the immune system and may even provide protection against various types of cancer.  Nettle leaf also contains vitamin A, which many scientists believe is necessary for eye health. In addition, nettle provides a range of other health benefits including:  Arthritis Relief  Manage Blood Sugar  Improve Respiratory Health  Improve Celiac Disease