immune system: echinacea, elderberry, zinc, cat's claw, melissa, coltsfoot, dandelion, elecampane, garlic, raspberry, tea tree, thyme, usnea, wu wei zi, black currant, lecithin, cf. acid

impotence: wu wei zi, damiana, hyssop

indigestion: see digestion

infections (acute): dandelion, echinacea

infections (colds): eucalyptus, echinacea

infections (general): melissa, cf. above, calendula, cinnamon, rosemary, oregano, comfrey, elder, goldenseal, jin yin hua, myrrh, oregon grape, plantain, wu wei zi

infertility: black haw, sage, wu wei zi

inflammation: cleavers, melissa, comfrey, elder, calendula, chamomile, lavender, hops, passionflower, California poppy, cf. anti-inflammatory & sedative

insomnia: wu wei zi, vervain, skullcap, valerian

irritability: xia ku cao (selfheal flower spikes), dandelion, oats, partridgeberry

itching: see skin, itchy

insect repellent: basil, Skin-So-Soft, cf. repellent

insect bites: see bites