Some studies suggest they may also help remove heavy metals.Black walnut hulls contain juglone, which may help to fight bacteria, cancer, and viruses. Juglone helps inhibit parasites from growing and damages their ability to repair themselves but is safe for humans. Artemisia Annua- This herb has been used in Traditional Chinese Medicine to treat malaria and is also known as sweet wormwood. It contains over 50 different antioxidant compounds to support the body. Artemisia annua is being researched for its anti-cancer properties and hundreds of papers have been published on its anti-parasitic effects.