Echinacea, Manuka, Cat’s Claw, Olive Leaf, Holy Basil, Reishi, Corydalis, Andrographis, Astragalus, Ginseng.
Look for a practitioner-only liquid, powder or tablet from your health food store, Naturopath or Herbalist. Or the dried herb to make teas from your health food or specialty tea store.
I use Optimal Rx Pty Ltd in my clinics.