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The Best Organic Milk Thistle Powder of 2023 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Organic Milk Thistle Powder of 2023. Check our ranking below.

2,641 Reviews Scanned

Rank No. #1

Starwest Botanicals Organic Milk Thistle Seed Powder, 1 Pound

Latin/Botanical Name: Silybum marianum
Origin: China
Certified Organic by QAI - In accordance with the USDA National Organic Program Guidelines
Kosher Certified by Kosher Certification Services

Rank No. #2

Organic Milk Thistle Extract, 3.5 Ounces, Pure Milk Thistle Powder Organic, Milk Thistle Tea, Contains 80% Active Silymarin, Strongly Supports Liver Health and Antioxidant, Vegan Friendly

Milk Thistle Organic Powder (Milk Thistle Supplement), 100 Grams, Premium Milk Thistle Liver Detox Supplement, Vegan and Pet Friendly.
Standardized Contain 80% Silymarin to Support Liver Health and Fight Radicals.
No Additives, No Preservatives, No Fillers, No GMOs, No Artificial Colors, No Flavor, No Soy and No Gluten
Scoop included to get the measurement every time. Take it daily with or between meals by adding it to a shake or smoothie, see what the most nutrient dense food on the planet is all about.
Powder lover? Take it naturally in powder for higher concentration, quicker absorption, easier on the stomach, and more ways to have fun!

Rank No. #3

UNLEASH'D ORGANIC Milk Thistle Powder 1 Pound,Rich in Silymarin and Antioxidants, Immune Support, Milk Thistle Seed Powder Organic

【Organic and Pure】 Discover the natural goodness of UNLEASH'D ORGANIC milk thistle powder, carefully sourced and meticulously crafted to meet the highest standards of organic purity, vegan friendly and gluten free.
【Nutrient-Rich】Uncover the nutritional powerhouse of UNLEASH'D ORGANIC milk thistle powder, enriched with essential vitamins and minerals for optimal liver support.
【Nutrient-Rich】Uncover the nutritional powerhouse of UNLEASH'D ORGANIC milk thistle powder, enriched with essential vitamins and minerals for optimal liver support.
【Experience Natural Blood Pressure Support】 Elevate your daily nutrition with UNLEASH'D ORGANIC milk thistle powder, enriched with silymarin, a potential aid in blood pressure regulation.
【Enhance Your Daily Nutritional Intake】 Incorporate organic milk thistle powder into your daily routine. Add it to your favorite smoothies, blend it into your daily meals, and boost your nutrition.

Rank No. #4

XPRS Nutra Organic Milk Thistle Seed Powder - Premium Milk Thistle Powder Rich in Silymarin and Antioxidants - Milk Thistle Seeds Support Liver Health - Vegan Friendly Milk Thistle Organic (4 Ounce)

Pure Organic Milk Thistle: We take great care to ensure that we are sourcing our powders from trusted suppliers. This milk thistle seed powder is a natural source of Silymarin, and is high in Calcium as well as Iron and Potassium. This ground milk thistle seed powder is pure and contains no fillers or additional ingredients.
Balance Your Diet: Milk thistle herb contains naturally occurring antioxidants. It may help to support liver functions within a normal range when incorporated into a balanced diet. This milk thistle powder organic is low calorie, sugar free, and high in fiber. Choose from 4oz, 8oz, and 16oz bag sizes and get your health game on.
Happy Live: Milk thistle seeds have numerous health benefits. It can be used for all ages, or as milk thistle powder for dogs. Be sure to do your research on milk thistle powder bulk organics milk thistle so you understand its benefits. This milk thistle herb powder may require a blender or shaker to mix thoroughly.
Hint of Nuttiness: Try out our pure milk thistle seed organic as a shake and smoothie booster, or incorporate it into your favorite recipes. Organic milk thistle seed powder powdered milk thistle is one of the most nutritious superfoods out there. It absorbs quickly into your body and is easily digestible.
Love Your Supplements: You'll love the superior quality of our organic milk thistle powder. Here at XPRS Nutra, our first priority is ensuring that we are providing our customers with premium raw organic milk thistle seeds organic in an ethical manner, at an affordable price. Try using putting milk thistle organic milk thistle extract powder in our empty pill capsules!

Rank No. #5

Nature Restore USDA Certified Organic Milk Thistle Seed Powder, 10 Ounces, Packaged in California

CERTIFIED ORGANIC | 100% USDA Organic Milk Thistle Seed Powder, Certified Organic by QAI
BENEFITS | Milk thistle is nature's detox remedy. Our course-ground milk thistle powder is a powerful tool to add to your health and wellness repertoire!
NEUTRAL TASTE WITH A HINT OF NUTTINESS | Simply add to your favorite DIY food and beverage recipes. When adding to liquid-based recipes, keep in mind that powder does not dissolve fully in water
10 Ounces, 283 grams. Packaged locally in Southern California in a heat sealed and re-closeable bag. Roughly 37 servings per bag, Recommend Serving is 1 tablespoon (approximately 6 grams)
Note | We're updating our packaging into jars and also the weight count. For Milk Thistle, you're now getting 10 ounces versus 8 ounces in the past

Rank No. #6

Erbology 100% Organic Milk Thistle Powder 2.1 oz - Cold-Pressed from 100% Milk Thistle Seeds - Rich in Silymarin - Cleanse and Detox - Straight from Farm - Raw Vegan - Non-GMO - Recyclable Glass Jar

100% ORGANIC, VEGAN: Superior quality milk thistle powder
PLANT-BASED INNOVATION: Specially selected by Erbology experts for its natural health-promoting properties
WHY WE'RE DIFFERENT: We cold-press small-batch, raw milk thistle seeds, removing the oils to provide the highest possible concentration of the bioactive component silymarin
HIGH IN SILYMARIN: A bioactive compound with powerful free-radical-fighting properties. One teaspoon contains about 330mg silymarin
LIVER HEALTH: Milk thsitle is traditionally linked to liver cleansing, while modern scientific research has linked silymarin with benefits for the liver

Rank No. #7

BulkSupplements.com Milk Thistle Extract Powder - Liver and Kidney Support - Silymarin Milk Thistle - Liver Detox - Liver Supplement - Milk Thistle For Dogs (100 Grams - 3.5 oz)

✔️ For the Bones - Our Milk Thistle Extract, in powdered extract form, may help support bone health.* And, our Milk Thistle supplement, which is sourced from Silybum marianum seed, is an ideal addition to any routine and regimen especially for people leading an active and healthy lifestyle!*
✔️ For Liver Health - Milk Thistle may help support the liver.* And our Milk Thistle Extract powder, or Milk Thistle powder, is one of herbal supplements selection for liver health.* Add 1/10 tsp of our Milk Thistle Extract per serving in your daily diet for overall wellness of your liver!
✨ Gluten Free & No Filler - Our Milk Thistle Extract powder, or Milk Thistle supplement, does not contain any fillers, additives and artificial flavors. And, this Milk Thistle powder is free of gluten, soy, dairy and added sugar which is ideal for people with dietary restrictions. Each serving contains 250mg for it's daily dose of this dietary supplement!
✨ Add to your Diet - Our Milk Thistle Extract is pure and natural without any additives. Not only that this supplement is filler free, our Milk Thistle powder is one of our herbal supplements selection for your choosing! This supplement is also Milk Thistle for dogs. However, always consult your veterinarian before giving it to your pets for proper dosage.
⭐ High Quality - All products by BulkSupplements are manufactured according to cGMP Standards to ensure the highest quality for manufacturing, packaging, labeling, and holding operations. We third party test our products at multiple stages during production, procedures and equipment to ensure compliance, standards and consistency.

Rank No. #8

Frontier Co-op Organic Powder Milk Thistle Seed 1lb

Botanical Name: Silybum marianum
Certified Organic
1 pound bulk bag (16 ounces)

Rank No. #9

BareOrganics Milk Thistle Seed Powder, Superfood Powder, Organic Dietary Supplement, 8 Ounces

Milk Thistle Powder: Milk Thistle is a perennial plant which produces seeds that are naturally extracted & gently ground to a fine powder. We preserve the important phytochemicals which are known to support liver health within a normal range.
Organic Milk Thistle Powder: The liver works diligently to rid the body of potentially harmful substances. This powder is a natural way to support liver health already within a normal range so it can continue working hard to help you feel your best.
Milk Thistle Supplement: Milk thistle’s main ingredient is silymarin which supports the body’s internal cleansing processes. This natural antioxidant helps the body rid itself of potentially harmful toxins as well as support normal liver function.
Organic Dietary Supplement: Superfoods deliver essential fuel for your body with unique micro & macronutrients to keep you feeling your best. BareOrganics’ organic superfood powders make it easier for the body to recognize & utilize key nutrients.
Size And Packaging Details: This vegan supplement comes in an 8 ounce reusable and recyclable, BPA free tub.

Rank No. #10

Liphontcta Wildcrafted Milk Thistle Seed Powder 16oz Pound Raw Silybum Marianum The Bloomin Herb Shoppe Pure Aromatic Potent Liver Bulk

WILDCRAFTED FRESH HERB - Wildcrafted fresh herb ordered biweekly Name: Silybum marianum
ORIGIN - Bulgaria Botanical Name: Silybum marianum
BULK QUANTITIES - Carefully weighed and packed as ordered in bulk quantities
QUALITY PACKAGING - Hand packed in food grade, heat sealed, resealable stand up pouches
HIGHEST QUALITY HERB - No chemicals, additives or preservatives, Non GMO and non irradiated

Rank No. #11

Erbology 100% Organic Milk Thistle Powder 4.2 oz - Cold-Pressed from 100% Milk Thistle Seeds - Rich in Silymarin - Cleanse and Detox - Straight from Farm - Raw Vegan - Non-GMO - Recyclable Glass Jar

100% ORGANIC, VEGAN: Superior quality milk thistle powder
PLANT-BASED INNOVATION: Specially selected by Erbology experts for its natural health-promoting properties
WHY WE'RE DIFFERENT: We cold-press small-batch, raw milk thistle seeds, removing the oils to provide the highest possible concentration of the bioactive component silymarin
HIGH IN SILYMARIN: A bioactive compound with powerful free-radical-fighting properties. One teaspoon contains about 330mg silymarin
LIVER HEALTH: Milk thsitle is traditionally linked to liver cleansing, while modern scientific research has linked silymarin with benefits for the liver

Rank No. #12

Go Nutra Milk Thistle Powder 1 lb. | Extract Strength 5:1 | Silybum Marianum Non-GMO

Pure Milk Thistle Extract - No added ingredients, fillers or preservatives
Non-Gmo, Vegan, Gluten-free
Concentrated Strength - 5:1 Extract Ratio
Rich in flavonoid antioxidants and silymarin

Rank No. #13

Milk Thistle Capsules - Strongest Available 10,000mg 80% Silymarin - Organic Cleanse & Detox Support Supplement - Extract Powder in Capsule Pill Form - Made in The USA

New Strongest 10,000mg Organic Milk Thistle 20:1 Extract 80% Silymarin Super Potent Formula; After the success of our best-selling 2000mg organic milk thistle formula we decided to 5x the strength to bring you to our knowledge the first 10,000mg version on the market! This all-natural version contains 80% Silymarin to offer maximum liver and detox support!
Money Back Guarantee; We offer a no questions asked money back guarantee.
Benefits; Milk Thistle powder in organic compliant capsules contains Silymarin, a group of naturally occurring full spectrum flavon lignan, which is well known for its support and detoxification.
High Standards; Our Milk Thistle is CCOF Certified Organic, Vegan, Non-GMO, Gluten-Free, manufactured in a FDA registered facility and made in the USA, while every batch is third party tested for quality and purity.

Rank No. #14

MILK THISTLE SEED POWDER GLUTEN FREE FLOUR 500G | ECO NAVA BRAND | LIVER DETOX. ADD TO SALADS, CEREALS, FRUIT STRIPS, JUICES AND BAKING RECIPES

Milk Thistle Seed Powder 500g | Liver Detox. No Additives, No Preservatives, No Fillers, No Gmos, No Artificial Colors, No Flavor, No Soy And No Gluten.
Add to salads, cereals, fruit strips, juices and backing recipes.
High content of polyunsaturated fatty acids. Macronutrients - potassium, iron, magnesium, calcium. Fatty acids.
Vitamins a, e, d, k, group b. Flavonoids (silymarin, silybinin, and sildianin). Trace elements - selenium, zinc, copper, manganese, chromium, boron, iodine.
Benefits: milk thistle is nature's detox remedy. Our milk thistle powder is a powerful herb to add to your health and wellness repertoire and may support immune, skin, and other aspects of health. Simply add to any food and beverage recipes. When adding to liquid-based recipes, keep in mind that powder does not dissolve fully in water.

SaleRank No. #15

Starwest Botanicals Organic Milk Thistle Seed, 1 Pound

Latin/Botanical Name: Silybum marianum
Origin: Croatia
Certified Organic by QAI - In accordance with the USDA National Organic Program Guidelines
Kosher Certified by Kosher Certification Services
cGMP Compliant (current Good Manufacturing Practices)

SaleRank No. #16

Organic Discounters USDA Organic Milk Thistle Extract Capsules, 280 Count, 7500 mg Strength, Potent 30:1 Extract, USDA Certified Organic, Rich in Silymarin Flavonoids, Vegan, Non-GMO and All-Natural

OUTSTANDING VALUE: Our Organic Milk Thistle contains 7500 mg strength per capsule AND 280 capsules per bottle – an amazing value! A single bottle contains up to a 9-month supply. Compare this to other leading brands that contain far few capsules, are not Certified USDA Organic, and do not provide a 7500 mg strength dosage. Our Organic Milk Thistle is a bargain not be found elsewhere!
30:1 EXTRACT FOR MAXIMUM STRENGTH DOSAGE: Our Organic Milk Thistle is made from a potent, concentrated 30:1 extract. A 30:1 extract means that the herb itself has been condensed, so that 30 grams of the original herb are concentrated into a single gram. By using a 30:1 extract, we have created a powerful supplement that is 30X stronger than standard Milk Thistle capsules.
USDA CERTIFIED ORGANIC: Our Organic Milk Thistle is derived from an all-natural, vegan, non-GMO source, and meets the strict organic standards of the USDA. While other competing products use various chemicals as fillers, binders, and excipients, our Organic Milk Thistle instead uses a unique blend of certified organic ingredients. One of these ingredients, Organic Acacia Powder, provides the added benefit of being a prebiotic, which feeds and encourages the growth of healthy probiotics.
NATURALLY OCCURRING SILYMARIN FLAVONOIDS: The "good stuff" in Milk Thistle is called Silymarin Flavonoids. Our Organic Milk Thistle is a great source of naturally occurring Silymarin Flavonoids.
GOLD STANDARD PRODUCTION: Your health and safety mean everything to us. For that reason, our Organic Milk Thistle is manufactured in the USA, in a fully compliant facility with adherence to good manufacturing policies and under the most stringent quality control. You can rest assured that you get the best value for your money!

SaleRank No. #17

Zazzee USDA Organic Milk Thistle 30:1 Extract, 7500 mg Strength, 120 Vegan Capsules, 80% Silymarin Flavonoids, Standardized and Concentrated 30X Extract, 100% Vegetarian, All-Natural and Non-GMO

OUTSTANDING VALUE: Our Organic Milk Thistle contains 7500 mg strength per capsule AND 120 capsules per bottle – an amazing value! A single bottle contains up to a 4-month supply. Compare this to other leading brands that require 2 capsules per serving, do not provide a 7500 mg strength dosage, and are not Certified USDA Organic. Our Organic Milk Thistle is a bargain not be found elsewhere!
30:1 EXTRACT / MAXIMUM STRENGTH DOSAGE: Our Organic Milk Thistle is made from a potent, concentrated 30:1 extract. A 30:1 extract means that the herb itself has been condensed, so that 30 grams of the original herb are concentrated into a single gram. By using a 30:1 extract, we have created a powerful supplement that is 30X stronger than standard Milk Thistle capsules.
80% SILYMARIN FLAVONOIDS: The "good stuff" in Milk Thistle is called Silymarin Flavonoids. The more Silymarin Flavonoids, the better the Milk Thistle! Our Organic Milk Thistle has been standardized to 80% Silymarin Flavonoids, which means that each capsules contains 200 mg of Silymarin Flavonoids from a 30:1 extract - the highest dosage available!
USDA CERTIFIED ORGANIC: Any Milk Thistle that is not CERTIFIED organic can be highly contaminated and even toxic to your liver. With Zazzee Naturals Certified Organic Milk Thistle, you can be sure your Milk Thistle is organic, all-natural, vegan, and non-GMO. More, while other competing products use various chemicals as fillers, binders, and excipients, our Organic Milk Thistle instead uses a unique Organic Stabilizer Blend.
GOLD STANDARD PRODUCTION: Your health and safety mean everything to us. For that reason, our Organic Milk Thistle is manufactured in the USA, in a fully compliant facility with adherence to good manufacturing policies and under the most stringent quality control. You can rest assured that you get the best value for your money!

Rank No. #18

Organic Discounters High Potency Organic Milk Thistle Extract, 11,250 mg Strength, 120 Capsules, Potent 30:1 Extract, Rich in Silymarin Flavonoids, Vegan, Non-GMO and All-Natural

OUTSTANDING VALUE: Our High Strength Organic Milk Thistle contains 11,250 mg strength per capsule AND 120 capsules per bottle – an amazing value! A single bottle contains up to a 4-month supply. Compare this to other leading brands that contain far fewer capsules, are not made with Organic Milk Thistle, and do not provide a 11,250 mg strength dosage. Our High Strength Organic Milk Thistle is a not be found elsewhere!
30:1 EXTRACT FOR MAXIMUM STRENGTH DOSAGE: Our Organic Milk Thistle is made from a potent, concentrated 30:1 extract. A 30:1 extract means that the herb itself has been condensed, so that 30 grams of the original herb are concentrated into a single gram. By using a 30:1 extract, we have created a powerful supplement that is 30X stronger than standard Milk Thistle capsules.
ORGANIC MILK THISTLE: Our High Strength Organic Milk Thistle Extract Capsules are derived from an organic, all-natural, vegan, non-GMO source. Taking a Milk Thistle that is not organic can be counterproductive, since the non-organic Milk Thistle introduces toxins to your body, at the very same time that you are taking Milk Thistle to remove toxins!
NATURALLY OCCURRING SILYMARIN FLAVONOIDS: The 'good stuff' in Milk Thistle is called Silymarin Flavonoids. Our Organic Milk Thistle is a great source of naturally occurring Silymarin Flavonoids.
GOLD STANDARD PRODUCTION: Your health and safety mean everything to us. For that reason, our Organic Milk Thistle is manufactured in the USA, in a fully compliant facility with adherence to good manufacturing policies and under the most stringent quality control. You can rest assured that you get the best value for your money!

Rank No. #19

Milk Thistle 2 fl oz Liquid Extract - Natural Liver Support Drops - Cleanse and Detox Herbal Supplement - Silybum Marianum Tincture for Man & Woman - Family Size - High Potency - 45-Day Supply

SHOW LOVE TO YOUR LIVER - Treat your liver with our herbal supplement. Packed with pure Milk Thistle Extract, a renowned ingredient supporting optimal liver health, it gives your liver the care it truly deserves.
STRENGTHEN YOUR IMMUNE SYSTEM - Enhance your body's natural defense mechanism. Our Milk Thistle drops help you better shield against impurities and contaminants and fortify your immune system.
UNLEASH YOUR SKIN'S RADIANCE - Discover the skin-loving benefits of Milk Thistle. Let your skin glow with renewed radiance and vitality.
EASY TO TAKE - Shake well before using. Two times per day, combine one full squeeze of the dropper with water or juice.
PROUDLY MADE IN THE USA - We take pride in our supplements being 100% produced in the United States.

Rank No. #20

USDA Organic Milk Thistle Extract Vegan Liquid Drops. Liver Detox Herbal Supplement. Zero Sugar, Great for Digestion and A Cleanse. Pure Organic Milk Thistle Tincture Supplements for Women and Men

Don’t be fooled. Liquid milk thistle may be absorbed more quickly and efficiently compared to capsules. That’s why with Peak Performance USDA Certified Organic Milk Thistle Seed Extract Liquid Drops, you get a highly bioavailable tincture supplement, from the highest quality ingredients we could find. We created a balanced, absorbable formula with optimized time, temperature, and ratio for extraction.
Powerful Yet Gentle - Zero Sugar, No Bitter Taste - Our customers enjoy our natural tasting formula without any bitter taste. Simply mix these drops in tea, juice, milk, or even water and you won’t even taste it!
Many Benefits - This antioxidant supplement has been traditionally used to promote liver health and digestion. It’s also used as a cleanse and detox herbal supplement. Great for women, men, and kids.
Vegan & Allergy Free - Free of Soy, Milk, Egg, Shellfish, Corn, Wheat & Peanuts. Contains NO Gluten or Preservatives. Manufactured Under The Highest Quality GMP Regulations and USA Standards.
Over 800,000 Customers + 1-for-1 Donation To Vitamin Angels. Peak Performance is celebrating over 800,000 customers and we are also very proud of our 1-for-1 donation match program. For every unit you purchase, through our partnership with the nonprofit Vitamin Angels, we will supply a child at risk of malnutrition with vitamins for 1 year! To date, we've supplied over 1 Million children with life changing Vitamins- So thank you for helping us continue this great cause!

Last update on 2023-08-06 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

How Do You Buy The Best Organic Milk Thistle Powder?

Do you get stressed out thinking about shopping for a great Organic Milk Thistle Powder? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching Organic Milk Thistle Powder, which is why we have assembled a comprehensive list of the greatest Organic Milk Thistle Powder available in the current market. We’ve also come up with a list of questions that you probably have yourself.

We’ve done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Organic Milk Thistle Powder that you consider buying. Your questions might include the following:

Is it worth buying an Organic Milk Thistle Powder?
What benefits are there with buying an Organic Milk Thistle Powder?
What factors deserve consideration when shopping for an effective Organic Milk Thistle Powder?
Why is it crucial to invest in any Organic Milk Thistle Powder, much less the best one?
Which Organic Milk Thistle Powder are good in the current market?
Where can you find information like this about Organic Milk Thistle Powder?

We’re convinced that you likely have far more questions than just these regarding Organic Milk Thistle Powder, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Organic Milk Thistle Powder, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Organic Milk Thistle Powder. Make sure that you are only using trustworthy and credible websites and sources.

We provide an Organic Milk Thistle Powder buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Organic Milk Thistle Powder currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

Brand Value: Every brand of Organic Milk Thistle Powder has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
Features: What bells and whistles matter for an Organic Milk Thistle Powder?
Specifications: How powerful they are can be measured.
Product Value: This simply is how much bang for the buck you get from your Organic Milk Thistle Powder.
Customer Ratings: Number ratings grade Organic Milk Thistle Powder objectively.
Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Organic Milk Thistle Powder.
Product Quality: You don’t always get what you pay for with an Organic Milk Thistle Powder, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an Organic Milk Thistle Powder is should be an indication of how long it will work out for you.

We always remember that maintaining Organic Milk Thistle Powder information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Organic Milk Thistle Powder is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly! We’re here for you all the time. Contact us here. Or You can read more about us to see our vision.

FAQ:

Q: Where to find milk thistle?

A: Milk thistle is native to Europe’s Mediterranean region. It now grows all over the world, including northern Africa, South Australia, and parts of North and South America.

Q: What is Thistle used for?

A: A decoction of the Thistle is used as a poultice for Sore Jaw. A hot infusion of the plant is effective for Rheumatic Joints. The whole plant is used as a herbal steam for joints.

Q: What is milk thistle seed?

A: Milk thistle seed is the part of the milk thistle plant used to propagate the botanical. It is the part of the herb from which an extract is frequently made and used primarily in the alternative medical treatment of liver disease. The medicinal properties of the seeds allow for their use to alleviate and treat other health problems as well.