Vitamin C is vital for immune health. It is antioxidant and helps protect cells against free radicals. It is water-soluble and supports the body's natural immune defense systems. Among these things, Vitamin C has been known to:
Improve mood
Aid in wound healing
Helps with the absorption of iron
Encourages the production of white blood cells
 
A tisane (pronounced teh-zan) is an herbal infusion, generally made for health and wellness, and made from the herbs flowers, roots, leaves, etc. Originally, these were prepared with barley and is where the name ptisane comes from in Greek, which means "peeled barley." This eventually evolved into the Middle English term we have here today, which means "medicinal drink."