Most of the supplements we review help you build muscle or lose fat. Milk thistle doesn’t do either of these, but it’s a great for supporting your liver health.
Your liver is a workhorse that has more functions than any other organ in your body. If it’s not functioning properly, you won’t be able to train at your full capacity. Milk thistle can help minimise damage caused by binge eating, drinking too much, or using anabolic steroids.
In this review, we’re going to look at why including it into your supplement stack can be beneficial for both seasoned lifters and novices. We’ll also compare the most common milk thistle supplements on the market so you can find the best one for your training.
Ready? Let’s dive into it.
Our Top Picks at a Glance
- Natures Aid DigestEeze
- HRI Milk Thistle Tablets Editor’s Choice
- HealthAid Milk Thistle Complex
- A.Vogel, Milk Thistle Complex
- Schwabe Thisilyn Maximum Strength Milk Thistle
- SYNVIT Milk Thistle 100 mg
Note: There’s a lot more information below but clicking the above links will take you to current prices, further information and customer reviews on Amazon.
What is Milk Thistle?
Milk Thistle is a herb that’s been used for thousands of years to treat various liver and gallbladder disorders. Other traditional usages include combating indigestion and symptoms of upset stomachs.
During the periods of the Roman and Greek Empires, people also traditionally used it for snakebites and insect stings.
The plant is native to the Mediterranean region of Europe, but now it grows across the world. You can often see its spiky purple flower growing from a spiny stem along fences and in meadows.
It goes by several other names such as Mary thistle or holy thistle. When milk thistle is included in liver detoxing supplements, it often goes by its Latin name Silybum marianum.
Silymarins and the Liver
The milk thistle plant contains a group of active ingredients known as silymarins, which are responsible for milk thistle’s liver-protecting benefits.
As we’ve already mentioned, the primary reason you’d want to take milk thistle is to protect your liver.
Nobody is going to compliment you in the gym about your liver function, but this powerful organ does the background work necessary for you to develop your muscles.
These are some of the primary functions of your liver:
- Bile production
- Blood detoxification
- Vitamin and mineral storage
- Fat metabolism
- Storage of glycogen (for stabilising blood sugar)
- Stimulates insulin release from the pancreas
Because of its role in blood detoxification, your liver is easily damaged. One of the most common ways people damage their liver is by drinking too much alcohol. However, if you’re dabbling in steroid usage, you might also be interested in protecting your liver.
Most post-cycle supplements designed to help your body come off of steroids include milk thistle in their blend.
Forms of Milk Thistle
There are several forms of milk thistle that you’ll see on labels, so it’s a good idea to learn the difference so you can compare different brands.
Milk Thistle Fruit: Milk thistle fruit is the raw form of the plant and is extracted from milk thistle seeds.
Milk Thistle Extract: This is a highly concentrated form of milk thistle that contains a high percentage of the active ingredient silymarin. Generally, milk thistle extract contains more than 65% silymarin. Many supplements contain closer to 80%.
Silymarin: Silymarin is the active ingredient in the milk thistle plant and provides the benefits. Silymarin can be divided into three compounds called silibinin, silychristin, and silydianin.
What Does It Do?
The most common use of milk thistle is to help your liver heal after you’ve mistreated it through overeating or drinking. It may also help protect your liver from damage caused by anabolic steroid use.
How does it protect your liver?
It’s thought that the active ingredient, silymarin, helps your liver create new proteins after an injury to repair itself faster. Silymarin also acts as a powerful antioxidant that protects your liver from metabolic damage.
It’s worth noting however, that taking milk thistle isn’t an excuse to binge drink and live an unhealthy lifestyle. However, it may help support your liver when life happens.
Benefits for Acne
Research shows that taking milk thistle daily may help with acne. In one study published in the Journal of Clinical & Experimental Dermatology Research, 14 participants were given 210g of milk thistle daily. Over eight weeks, the group who took milk thistle had a 53% reduction in acne lesions.
Benefits for Steroid Users
It’s no secret that steroids can cause long-term organ damage if abused. In particular, your liver can take a hit. Some bodybuilders include milk thistle in their cycle to help protect their livers.
Whether you use steroids or not is a personal choice, but if you do decide to use them, know that they can cause long-term damage to your internal organs.
Most performance-enhancing drugs are taken in cycles to give your body time to reset, so most people who take liver-supporting supplements take them at the end of their cycle.
You might also see ingredients live Tongkat Ali, artichoke extract, and dandelion in post-cycle supplements along with milk thistle.
There’s not much research looking at how effective these supplements are for protecting your liver from steroids, so it’s not clear what dose you should be taking, but a commonly recommended dose is 140mg of silymarin up to three times per day.
How Do You Take Milk Thistle?
You can take milk thistle orally in several different forms. Generally, it’s sold in capsules or tablets, but milk thistle extract is also sometimes sold as liquid drops.
Here are a few questions you may want to ask yourself when comparing milk thistle supplements:
- How much milk thistle extract is in each dose?
- How much silymarin is in each does (ideally 80% or more)?
- Is it vegan / vegetarian (if it matters to you)?
- Do they offer bulk discounts?
Again, the most common recommended dose is 140 mg of silymarin taken three times per day. This is the amount shown to help protect your liver from acute viral infections. Lower doses may be effective for supporting general health.
Are There Any Side Effects?
Milk thistle is fairly safe when taken orally. Generally, symptoms are quite mild and are generally limited digestive problems such as diarrhoea, bloating, an upset stomach, or nausea.
It may also interact with blood sugar levels, so anybody with diabetes may want to be cautious. There aren’t any long-term studies looking at its effects on pregnant women or people under 18 years ago, so people in these groups should probably avoid it.
Although rare, some people may have an allergic reaction to the plant.
A Detailed Look at the Best Milk Thistle Supplements
Some milk thistle supplements contain milk thistle by itself and some include other liver-supporting ingredients like dandelion or artichoke. Here’s a side by side comparison of some of the top milk thistle available on the UK market to help you find the best value.
DigestEeze is designed to help your liver heal from a binge of food or alcohol. Customers report finding that it works well for calming an upset stomach as well as indigestion caused by overeating.
Unlike some of the other products on this list, the only medical ingredient is milk thistle. This highly concentrated form of milk thistle can support your liver after acutely poor dietary choices.
- 60 tablets per bottle
- 136.5-165 mg of milk thistle extract (82.5 mg Silymarin per dose)
- Comes in packs up to eight bottles
- Equivalent to 2750-6600mg of milk thistle fruit
- Take 1-2 tablets twice per day
- For adults over 18
- Made in the UK
- Vegetarian and vegan-friendly
- Relatively cheap compared to other brands
- Made in the UK
- Can get a discount for bulk orders
- Not the cheapest option
- Becomes expensive if you use the high-end dose
DigestEeze offers a solid amount of milk thistle per serving. If you aren’t looking for any bonus ingredients and only care about the amount of milk thistle, this is a solid choice.
All the ingredients are clearly labelled and there are 82.5 mg of silymarin per tablet, which is slightly more than in the average milk thistle supplement.
HRI Milk Thistle Tablets Editor’s Choice
HRI state they are selling the highest approved dose of silymarin in the UK. Each tablet contains more than double the amount of silymarin found in the average milk thistle supplement (usually around 80 mg).
If you’re looking for an extremely high dose of milk thistle, this might be the product for you.
- 30 tablets per bottle
- Designed to help with indigestion and upset stomachs
- Contains the equivalent of 300 mg of milk thistle extract
- 174 mg silymarin per tablet
- Made in the UK
- Take 1-2 tablets per day
- Tablets are easy to swallow
- Contains the highest approved dose in the UK
- Fairly expensive compared to other supplements
- Only 30 tablets per container
The per-serving price of this milk thistle supplement is higher than most others on this list, but it more than makes up for it with its extremely high dose of 174 mg of silymarin per serving.
This supplement is a great choice if you’re looking for an extremely powerful milk thistle supplement.
The HealthAid Milk Thistle Complex includes the essential nutrient choline, which is supposed to help support proper liver function. It doesn’t contain as much silymarin as most of the other supplements on this list, but it does also contain artichoke and dandelion.
According to their Amazon page, this product is suitable for both men and woman who consume a lot of alcohol, have a poor diet, feel rundown, or smoke.
Having a blend of ingredients all in one bottle offers a convenient way to support your liver without having to take multiple supplements.
- 60 tablets per container
- 2 tablets per serving
- 80 mg milk thistle extract (about 64 mg of silymarin)
- Contains choline
- Suitable for both men and women
- Contains vitamin A and B vitamins
- Contains artichoke leaf powder
- Contains dandelion, choline, and artichoke
- Contains a mix of amino acids
- Ingredients clearly labelled
- Only 64mg of silymarin per serving
- Relatively expensive for the amount of silymarin
Overall, this supplement makes a good choice if you’re looking for a mix of ingredients that can support your liver. However, if you’re specifically looking for the benefits of milk thistle, you may want to go with some of the other supplements on the list that have a higher concentration of silymarin.
Unlike the other supplements we’ve reviewed so far, this product comes in drops instead of tablets. It’s also supported with extracts from four other herbs including boldo leaves, artichoke, peppermint, and dandelion.
Even on the company’s website, the total amount of silymarin isn’t clearly labelled. However, there seems to be about 839 mg of milk thistle extract per 30 drops.
If you’re tired of swallowing a mouthful of tablets each morning, you may like this liquid supplement.
- Contains 100 ml of milk thistle drops
- 33 drops per ml
- Take 20 drops twice daily
- 62% milk thistle extract
- Sugar, gluten, and lactose-free
- 839 mg of milk thistle extract per 30 drops
- Contains artichoke, dandelion, boldo dried leaf, peppermint
- In drops instead of tablets
- Contains extracts from other liver-supporting herbs
- Strong taste
- Total amount of silymarin not clearly labelled
This is the only liquid milk thistle supplement on the list. If you’re somebody who doesn’t like taking a handful of tablets each morning, this might be a welcomed alternative. The biggest downside to this product is the total amount of silymarin isn’t labelled.
Schwabe Thisilyn Maximum Strength Milk Thistle is one of the most powerful on this list. Each capsule contains 108 mg of silymarins. It is high quality, but it also comes at a price to match.
If you prioritise quality over price, you might like this product knowing that it’s providing a very high dose of silymarins.
- 30 capsules per container
- Each capsule contains 108 mg silymarins
- Take once to twice daily
- For the overindulgence of food or drink
- Contains 108 mg of silymarins per capsule
- Easy to swallow
- No bad taste
- Amazon page doesn’t contain a full ingredient list
- Lots of filler ingredients
- Quite expensive
Usually, there’s a trade-off between price and quality. The Schwabe Thisilyn Maximum Strength Milk Thistle supplement is one of the most expensive per serving of any of the products on this list, but it also has the second-highest concentration of silymarin, only behind HRI Milk Thistle tablets.
This milk thistle supplement offers the lowest per-serving price. You can buy packages ranging from 90 to 360 tablets, and the more per bag you buy, cheaper it becomes. It doesn’t contain anything fancy, but you get a solid 80mg of silymarin per serving.
The cheap and basic formula offers you a great way to support your liver without breaking your budget.
- Comes in 90-360 tablet bags
- 325 mg of milk thistle powder per capsule
- 100 mg milk thistle extract per tablet
- 80 mg silymarin per tablet
- Very cheap per serving price
- Larger bags offer an even cheaper price
- Made in the UK
- Large tablets may be difficult to swallow
Some customers report that the tablets are a little hard to swallow, but if that doesn’t bother you, they make a great basic option. They’re the one of the most economical milk thistle supplement per serving we’ve reviewed. When you buy the biggest bag of 360 tablets it gets to be even better value.
Taking milk thistle is a great way to support your liver from damage caused by overeating, drinking too much, or taking steroids.
There are plenty of solid options on the market, but we particularly like HRI’s Milk Thistle Tablets.
They offer the highest per tablet dose of milk thistle’s active ingredient silymarin of any tablet sold in the UK at 174 mg. This is more than double the amount of silymarin found in most milk thistle supplements (usually closer to 80 mg), and it’s still sold at an affordable price.
If you’re looking for an economical option, we recommend SYNVIT Milk Thistle. It offers great value and it gets even cheaper as you buy larger bags. They offer bags up to 360 tablets.