Gaia Herbs Milk Thistle Review

Gaia Herbs Milk Thistle is a premium liver health supplement meticulously formulated to support your liver's vital functions and the body's natural detoxification processes, thereby promoting overall digestive well-being. This full-spectrum Milk Thistle extract is specifically crafted for enhanced bioavailability, ensuring that the beneficial compounds are effectively absorbed and utilized by your body, a significant improvement over standard milk thistle extracts. The product exemplifies Gaia Herbs' unwavering commitment to quality, benefiting from over 30 years of expertise from a distinguished European extractor who employs state-of-the-art equipment to guarantee the highest quality milk thistle extract in every capsule. This dedication ensures that consumers receive a potent and effective supplement for their liver support needs. Gaia Herbs, a brand with a rich history spanning over 35 years, is devoted to empowering individuals to lead healthier, more balanced lives. Their foundational philosophy integrates traditional herbal wisdom with contemporary scientific research, meticulously overseeing every stage from the cultivation of plants in the soil to the final supplement production. This comprehensive oversight ensures unparalleled purity, quality, and integrity in all their offerings. This particular Milk Thistle supplement is conveniently presented in vegan capsule form, making it effortless to integrate into any daily health regimen. It is specifically designed for adult use and adheres to strict vegan and vegetarian dietary standards, being entirely free from soy, catering to a broad range of dietary requirements and preferences. A standout feature of this product is its USDA Organic certification, which guarantees that it comprises at least 95% organic material. This certification is a testament to farming practices that actively maintain and improve soil and water quality, minimize the use of synthetic materials, conserve biodiversity, and strictly prohibit genetic engineering. The crops utilized are cultivated without any prohibited substances, such as most synthetic fertilizers and pesticides, for a minimum of three years prior to harvest. Furthermore, USDA Organic products are assured to be free from genetically modified organisms (GMOs), artificial colors, flavors, or preservatives, aligning with a holistic approach to health and environmental stewardship. Each bottle contains 120 vegan capsules, providing 40 servings, specifically formulated to support robust liver function and detoxification. It is important for consumers to understand that these statements have not been evaluated by the Food and Drug Administration, and this product is not intended to diagnose, treat, cure, or prevent any disease.

Product Focus: Liver HealthAlso graded for:Hormone Balance for WomenAlso covers:Digestion
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$38
Study, Trial or Testing Result SummaryMembersHuman studies

1 of these 70 human studies gave the ingredient by drip, not by mouth.

This product gives 750 milligrams of milk thistle extract with 375 milligrams of silymarin, its active part, which is the doses that in studies. A 2025 review of 55 randomized trials with 3545 people with liver injury found silymarin two main liver enzymes, with in drug or alcohol related liver disease. …

Members see the full analysis, checked against their own meds and goals. Start My 7-Day Free Trial →

Review Totals and SummaryMembers3,149 reviews
3,149 reviews · Amazon 1,329 · IHerb 1,052 · Walmart 548 · Gaia Herbs 220
Biohacker SummaryMembersWhat our biohacker panel says

of those six it, mainly to support the liver and detox, including around drinking, and some also mention skin, allergy symptoms, and an enlarged prostate. Doses came up from two of them: one suggested 200 to 400 mg of silymarin at 80 percent, another 70 to 140 mg of silymarin taken 30 to 60 minutes before hot-cold contrast therapy, and a third suggested starting with 200 mg a day for allergy symptoms. …

Members see the full analysis, checked against their own meds and goals. Start My 7-Day Free Trial →

RAL SummaryMembersThe tier and why

Rated T2 because pooled analyses, the largest covering 3545 people, show silymarin liver enzymes and liver fat, and the product provides silymarin studied doses with customer ratings.

Members see the full analysis, checked against their own meds and goals. Start My 7-Day Free Trial →

More DetailsMembersBody systems · Combine with · Possible side effects

Body systems: Digestive system, Liver. Combine with and possible side are for members.

Members see the full analysis, checked against their own meds and goals. Start My 7-Day Free Trial →

Supplement FactsOrganic Silactive® Milk Thistle fruit extract 750 mg · Silymarins 375 mg
Supplement Facts
Serving Size 3 Capsules
Servings Per Container 40
Amount Per Serving% Daily Value
Total Carbohydrate1 g<1%
Organic Silactive® Milk Thistle (Silybum marianum) fruit extract750 mg†
Silymarins375 mg†
* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value not established.

Directions: Adults take 3 capsules daily in the evening.

Label source: Amazon · Report a label change

Where to BuyAmazon · Publix
AmazonBuy ↗
PublixBuy ↗

We sell no supplements. Prices change; check the store.

Graded October 23, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.