Elderberry (Sambiacus nigra) is another wonderful immune system herb with a variety of other uses as well. It works as an anti-viral and so is helpful to fight colds and flu, but if one is already ill, it also works as an expectorant, soothes throat inflammation, and helps fight fever. It also helps stimulate blood flow, and has been used as a mood enhancer as well.

The berries are very nutritious, offering high levels of vitamin C, biotin, beta carotene, protein, fiber, sugars, and tyrosine.

Elderberry syrup is also popular for colds and flu. It soothes the throat, helps with coughing up mucous, and helps fight infection.