4. Horsetail

As a diuretic and antioxidant, horsetail is known to support the overall health of your kidneys. It can be beneficial to those suffering from edema, incontinence, bladder/kidney stones, and urinary tract infections. However, extended use of the herb can lead to a thiamine deficiency since horsetail breaks down the vitamin through a chemical component known as thiaminase.

Typically taken as a tea or capsule, the varieties of horsetail that are safe for consumption come from Equisetum arvense, Equisetum hyemale, or Equisetum telmateia. Horsetail that is derived from the Equisetum palustre variety has proven to be toxic in cattle.