Milk thistle is widely available, at health food stores, and even some drug stores and grocery stores. The standardized extract that has been widely tested and has also been approved in Germany for liver disease and functional liver impairment contains 70 to 80 percent silymarin. Dosage recommendations are usually on each bottle, and should be discussed with an individuals medical practioner, but a general guide offered by some for an adult humans use is 420 mg. of silymarin taken in 3 divided doses daily. If there is no liver damage, and you simply want to protect your liver from damage, it is often recommended that an adult human use around 280 mg. of silymarin daily.
The usual recommended extract of milk thistle contains 70 to 80 percent silymarin. Each extract should be labeled with the silymarin percent. The tincture can be administered at a starting dose of 1/4 tsp. per 20lbs of animal’s body weight per day. The daily dosage should be taken in 2-4 equally divided doses. With the powder format, administer 2-5mg per 1lb of the animal’s body weight, 2 to 3 times per day. Read labels carefully, discuss dosages and, although there are no known drug interactions, it’s always important to consult with your veterinarian.