By Nature's Way, certified organically grown. Used by herbalists since the 14th century and by Chinese and Ayurvedic practitioners in treating cancer. Antibacterial and antifungal properties make this an excellent herb; contains Vitamin A z(not from fish oil), selenium, and chromium. Helps regulates blood sugar levels and acts as an antioxidant. Suggested for skin disorders, tumor regression, gout and arthritis, liver and gall bladder disorders. Is a tonic for the lungs and as a blood purifier. Used in an Ojibybway Indian combination (Essiac Tea and Flor-Essence Tea) with slippery elm, sheep sorrel, and Indian/Turkey Rhubarb for cancer and ulcers. Best way to use is as a tea or capsules. Best time to use is daytime. No cautions unless you are pregnant, also can interfere with iron absorption which can be beneficial for some people with hepatitis who have high iron content in the blood. Not to be used excessively in large amounts. Bottle of 100 capsules, 540 mg each.