How to Use the Milk Thistle Calculator
Silymarin, the main active compound in milk thistle, is thought to help protect liver cells and support antioxidant activity, which is why it's popular with people who drink regularly or are simply mindful of liver health. This calculator takes your weekly alcohol intake and liver history to estimate a commonly used daily silymarin dose (mg) for reference.
A frequently cited amount is 140mg of standardized silymarin extract taken 2-3 times a day, for a total of roughly 280-420mg. This calculator defaults to a 150mg/day maintenance dose for little or no alcohol intake, increasing to 300mg for 7+ drinks a week and 420mg for 14+ drinks a week (closer to heavy drinking levels). Regardless of alcohol intake, if you already have a diagnosed liver condition or abnormal liver enzymes, the result strongly recommends consulting a healthcare provider before deciding on supplementation yourself.
Keep in mind that milk thistle is a supportive supplement, not a treatment for liver disease. If you suspect fatty liver, hepatitis, or abnormal liver enzymes, don't try to self-manage it with supplements — get a proper diagnosis and treatment plan from a doctor. See the FAQ below for more.
Frequently Asked Questions
A commonly used amount is 140mg of standardized silymarin extract, taken 2-3 times a day (about 280-420mg total). The right amount can vary based on alcohol intake and liver condition.
No. Milk thistle is a supportive supplement, not a treatment. If you already have abnormal liver enzymes or a diagnosed liver condition, don't decide on supplementation yourself — consult a healthcare provider.
The liver handles metabolism and detoxification even without alcohol involved, so some people take a small maintenance dose for general liver support. It's not an essential nutrient, so it comes down to personal preference.