Liver support supplements cannot clean out your liver, because your liver and kidneys already clear waste from your blood every day. Milk thistle is the most studied option, but results in people have been mixed, so drinking less alcohol, staying in a healthy weight range and checking your medicines do far more for your liver than any capsule. Here is what the evidence says, what to look for on a label in Australia, and when a supplement could do more harm than good.
Liver support supplements at a glance
| Option | What it is | What the evidence says | Example at Supps247 |
|---|---|---|---|
| Milk thistle (silymarin) | Herbal extract from milk thistle seeds | Well tolerated, but studies in people with liver conditions are conflicting or too limited | NOW Milk Thistle Double Strength, 200 capsules, $74.95 |
| TUDCA | A bile acid your body makes in small amounts | Most research is in cells and animals | Beast Labs TUDCA 250 mg, 60 capsules, $79.95 |
| Turmeric or curcumin | Spice extract found in many liver blends | The TGA has warned of a rare risk of liver injury | Check blend labels for either name |
| Drinking less alcohol | A habit, not a product | NHMRC guidelines: no more than 10 standard drinks a week and 4 on any one day | Free |
| Healthy weight, diet and activity | Everyday habits | Recommended by healthdirect to look after your liver | Free |
Prices are live and shown at the time of writing. The two free options at the bottom of the table are the ones with the strongest support.
What "detox" really means
Your liver turns alcohol, medicines such as paracetamol and other waste into forms your body can get rid of, and your kidneys filter much of it out. The liver also makes bile to digest fat, stores vitamins and iron, and makes proteins such as clotting factors. All of this happens around the clock without help from a supplement.
So when a label talks about a cleanse or a flush, it is a marketing word, not a medical one. The Australian Government's healthdirect service says there is little evidence that liver cleanses and supplements work. It suggests speaking with your doctor or pharmacist about a product's ingredients and any interactions with your medicines before you take one. That is the honest starting point for this whole category.
Milk thistle: the most studied liver supplement
Milk thistle is a flowering plant, and silymarin is the main group of compounds in its seed extract. It has a long history of traditional use for the liver. The US National Center for Complementary and Integrative Health (NCCIH) says trials in people with liver conditions have had conflicting or too limited results, and there is not enough high-quality evidence to draw firm conclusions.
The good news is that it appears to be well tolerated. The most common side effects are tummy upset, bloating and gas, and it can cause allergic reactions in people sensitive to plants in the daisy family, such as ragweed. A small number of studies suggest milk thistle may lower blood sugar, so if you take diabetes medicine, talk to your GP before you start.
How to read a milk thistle label
- Standardised extract. A standardised extract tells you how much silymarin you get. NOW Milk Thistle Double Strength lists 300 mg of extract standardised to 80% silymarin per capsule, plus 100 mg of dandelion root and 50 mg of artichoke leaf. The 50 capsule bottle is $34.95 and the 200 capsule bottle is $74.95, or about $0.37 a capsule.
- Simple single-ingredient capsule. Primabolics Milk Thistle has 600 mg of milk thistle in each vegetarian capsule, one capsule per serve, with 60 serves for $39.95 (about $0.67 a serve). The label does not list a silymarin percentage, so you cannot compare it directly with a standardised extract.
- Dose. Follow the label directions, and do not stack several liver products that contain the same herb.
TUDCA and other ingredients in liver blends
TUDCA (tauroursodeoxycholic acid) is a bile acid joined to taurine, and your body makes small amounts of it. It is popular with lifters, and Beast Labs TUDCA 250 mg has been our best-selling TUDCA over the last six months. Each capsule holds 250 mg, with 60 capsules for $79.95 (about $1.33 a capsule).
Be realistic about it. A 2019 review in the journal Cells describes a large amount of positive pre-clinical research, meaning cell and animal studies, but notes limits on its wider use in patients. There is very little research in healthy people who simply train hard, so think of TUDCA as an option with weak evidence rather than a must-have.
You will also see these in multi-ingredient liver formulas:
- Turmeric or curcumin. The TGA has warned that medicines containing turmeric or curcumin carry a rare risk of liver injury. Check blend labels for either name, especially if you already take a turmeric product.
- NAC (N-acetyl cysteine). It appears in many liver blends. This guide does not cover NAC products. If you are considering one, speak with your GP or pharmacist first.
- Long ingredient lists. The more herbs in one capsule, the harder it is to know what you are getting, and the harder it is to work out which ingredient caused a problem.
When supplements can be hard on your liver
Your liver processes supplements just like it processes medicines. A review of the US Drug-Induced Liver Injury Network, published in the journal Hepatology, found that herbal and dietary supplements were behind about 20% of the liver injury cases it recorded. Products sold for bodybuilding and weight loss were among the most common, and with multi-ingredient products the exact cause often could only be suspected.
That does not mean supplements are risky for most people. It means a few simple habits are worth keeping:
- Start one new product at a time, so you know what you are reacting to.
- Avoid doubling up on the same herb across several products.
- Never use a liver product to cover for heavy drinking.
- Stop taking it and see your GP promptly if you feel unwell, or if you notice yellowing of your skin or eyes.
What actually supports your liver
healthdirect lists the basics, and most of them cost nothing:
- Drink less alcohol. The NHMRC guidelines say healthy adults should drink no more than 10 standard drinks a week and no more than 4 on any one day.
- Stay in a healthy weight range with a balanced diet and regular activity.
- Use medicines as directed, including paracetamol, and tell your doctor or pharmacist about every supplement you take.
- Quit smoking, and ask your GP about hepatitis A and B vaccination.
- Ask about a liver health check if you are at higher risk because of your age, alcohol use or a health condition.
Our verdict: should you take a liver support supplement?
If your goal is to undo a big weekend, no supplement will do that, and drinking less is the step that counts. If you are healthy, eat well and want to try a herbal liver product, a standardised milk thistle extract such as NOW Milk Thistle Double Strength is the most studied place to start, with the honest caveat that benefits in people are not proven. Primabolics Milk Thistle is a simple single-ingredient alternative. TUDCA is popular in gyms, but its evidence is mostly from the lab.
Talk to your GP before taking any liver supplement if you have a liver condition, drink heavily, are pregnant or breastfeeding, or take regular medicines. You can browse our herbal supplements range, see how supplements fit together in our supplements guide, and order online with Afterpay available at checkout and free shipping in Australia on orders of $99.99 or more.
Shop the products in this guide
NOW Milk Thistle Double Strength 200 caps$74.95
Primabolics Milk Thistle 60 caps$39.95
Beast Labs TUDCA 250 mg 60 caps$79.95
Browse all herbal supplements.
FAQs
Do liver cleanse supplements actually work?
There is little evidence that liver cleanses and supplements work, according to healthdirect. Your liver and kidneys already clear alcohol, medicines and other waste from your blood, and a supplement cannot speed that up in a healthy person. Drinking less alcohol, staying in a healthy weight range and using medicines as directed are the steps with real support behind them. If you are worried about your liver, ask your GP about a liver health check.
Is milk thistle safe to take every day?
Milk thistle taken by mouth appears to be well tolerated, according to NCCIH. The most common side effects are tummy upset, bloating and gas, and people allergic to daisy family plants such as ragweed may react to it. Little is known about its safety in pregnancy or breastfeeding. Follow the label dose, and check with your GP or pharmacist first if you take regular medicines, especially for diabetes, because milk thistle may lower blood sugar.
What is TUDCA and does it work?
TUDCA is a bile acid joined to taurine. Your body makes small amounts, and in Australia it is usually sold as 250 mg capsules. It is popular with gym-goers, but most of the research behind it comes from cell and animal studies, so there is little evidence for healthy people. If you have a liver or gallbladder condition, or take regular medicines, speak with your GP before trying it.
Can supplements damage your liver?
Rarely, yes. In a large US liver injury registry, herbal and dietary supplements were linked to about 20% of cases, with bodybuilding and weight loss products among the most common. In Australia, the TGA has warned about a rare risk of liver injury with turmeric and curcumin medicines. Start one new product at a time, follow the label, and see your GP promptly if you feel unwell or notice yellowing of your skin or eyes.
How much alcohol do the Australian guidelines recommend?
The NHMRC guidelines say healthy adults should drink no more than 10 standard drinks a week and no more than 4 standard drinks on any one day to reduce the risk of harm. People under 18 and women who are pregnant or planning a pregnancy should not drink alcohol. Drinking less is better for your liver, and no supplement makes up for heavy drinking.
Sources: healthdirect: Liver; NCCIH: Milk thistle; NHMRC: Australian alcohol guidelines; TGA: Medicines containing turmeric or curcumin, risk of liver injury; Navarro et al., Liver injury from herbal and dietary supplements, Hepatology; Kusaczuk, Tauroursodeoxycholate review, Cells (2019); product labels and brand nutrition panels, checked October 2026.
Order online with Australia-wide delivery, free on orders of $99.99 or more, with Afterpay available at checkout. You can also use click and collect at a store that offers it, or visit a Supps247 store in Melbourne, regional Victoria or Brisbane to compare products in person. Members can use our member price match on full-priced items.
Prices and stock were checked on 29 October 2026 and can change at any time. Always read the label and follow the directions for use. If you have a medical condition, are pregnant or take regular medication, check with your doctor first.
