Extensive information on the herbal remedies that can prevent or treat colds and flu. Immune system building herbs are discussed, as well as homeopathic remedies. Many of the herbs are broken down by their mode of action: expectorant, antibacterial, diaphoretic, etc. Very comprehensive and helpful. This packet also contains information about nutritional therapies. Herbs discussed include: echinacea, ginger, osha, schisandra, goldenseal, elder, garlic, cat's claw, reishi, lemon balm, mint, linden, thyme, astragalus, and ephedra.