KEY TAKEAWAYS
- -Blessed Thistle used to improve digestion, treat infections, and boost breast milk supply.
- Milk Thistle commonly used for liver support and antioxidant benefits.
- Both herbs are available as teas, capsules, or tinctures.
- Blessed thistle primarily supports lactation and digestion; milk thistle focuses on liver health, antioxidants, and some digestive support.
Both herbs are generally safe for adults when taken as directed, but blessed thistle may induce uterine contractions, so it is not recommended during pregnancy.Herbal remedies have been used for centuries to support health and wellbeing, and two plants often discussed together are blessed thistle and milk thistle. While they sound similar and share a family (Asteraceae), they serve very different purposes in modern herbal medicine. Understanding the difference between the two can help you choose the right supplement for your health goals.
What is Blessed Thistle?

Blessed thistle, or Cnicus benedictus, is a hardy herb native to the Mediterranean. Its prickly leaves and yellow-red flowers reflect its rugged origin, thriving in dry, rocky soil. The plant earned its name in medieval times because Benedictine monks believed it had “blessed” healing properties, using it to treat digestive problems, infections, and low appetite.
Today, blessed thistle is most famous for its use in boosting milk production in breastfeeding mothers. It can be consumed as a tea, tincture, or capsule. Some also use it topically for skin ailments, soaking it into gauze and applying directly to the affected area.
Benefits of Blessed Thistle
- Supports Lactation: One of the main reasons women use blessed thistle is to promote healthy milk flow. Studies show it may increase milk production when used alone or with other herbs like fenugreek.
- Digestive Aid: Blessed thistle can stimulate the production of gastric acids and saliva, helping with digestion, loss of appetite, bloating, and constipation.
- Immune Support: Its tannin content may offer mild antibacterial properties, supporting the immune system.
- Energy and Wellbeing: Some herbalists suggest it may enhance overall vitality, particularly in postpartum women.
Potential Side Effects: Consuming more than 6 grams per day may cause nausea, vomiting, or upset stomach. Allergic reactions are possible, especially in people sensitive to ragweed, marigolds, or daisies. It should not be used during pregnancy due to possible uterine stimulation.
Blessed thistle is a herb that can help increase breast milk, aid digestion, and support the immune system, but too much or allergies may cause problems.
What is Milk Thistle?

Milk thistle, or Silybum marianum, is a spiny herb native to Europe. Its distinctive purple flowers feature white veins that resemble milk, hence the name. Milk thistle has been used in traditional medicine for over 2,000 years and is now widely studied for its potential liver-protective effects.
The key active compound in milk thistle is silymarin, a complex of flavonoids believed to act as antioxidants and support liver health. The plant can be consumed as a tea, capsule, or extract.
Benefits of Milk Thistle
- Liver Support: Milk thistle is most commonly taken to help protect liver cells from toxins and support overall liver function. Some research suggests it may help people with non-alcoholic fatty liver disease (NAFLD) and cirrhosis.
- Blood Sugar Management: Lower blood sugar in people with diabetes.
- Antioxidant Effects: Silymarin can help reduce oxidative stress in the body, protecting cells from free radical damage.
- Digestive Aid: Milk thistle may help the liver and gallbladder process fats more efficiently, indirectly supporting digestion.
- Skin and Heart Health: Some evidence indicates it can improve skin health and support normal cholesterol levels.
Potential Side Effects: Milk thistle is generally well tolerated but can occasionally cause diarrhoea, nausea, or headache. Allergic reactions may occur in people sensitive to the Asteraceae family. There is limited safety data for pregnant or breastfeeding women, so caution is advised.
Milk thistle is a herb that may protect the liver, support digestion, manage blood sugar, and provide antioxidants, though it can sometimes cause mild side effects or allergies.
Blessed Thistle vs Milk Thistle: Key Differences
Feature | Blessed Thistle | Milk Thistle |
Scientific Name | Cnicus benedictus | Silybum marianum |
Primary Use | Breastfeeding support, digestion | Liver protection, antioxidants |
Flowers | Yellow/red | Purple with white veins |
Lactation Effect | Boosts milk production | May modestly support milk production, but less studied |
Digestive Support | Stimulates gastric acids and saliva | Supports liver function for digestion |
Safety Notes | Not recommended in pregnancy; may cause nausea at high doses | Generally safe; check for allergies; limited pregnancy data |
In short, blessed thistle vs milk thistle highlights that although both herbs are thistles, they serve different purposes. Blessed thistle is better for lactation and digestion, while milk thistle is focused on liver and antioxidant support.
Nutrition Support & Research
Several studies provide insight into the effects of these herbs:
- Blessed Thistle & Lactation: Research indicates that combining blessed thistle with fenugreek can increase milk production in nursing mothers.
- Milk Thistle & Liver Health: Clinical trials show that silymarin may help improve liver enzyme levels in people with liver disorders, though results can vary.
- Digestive Support: Both herbs contain compounds that stimulate digestion, with blessed thistle focusing more on gastric acids and milk thistle supporting liver-related digestion.
Including these herbs as part of a balanced diet may provide natural support, but they should complement, not replace, medical advice or treatments.
Safety and Precautions
Before adding blessed thistle or milk thistle to your routine, consider:
- Allergies: Both plants belong to the Asteraceae family. People allergic to ragweed, daisies, or marigolds may react.
- Pregnancy and Breastfeeding: Blessed thistle is not recommended during pregnancy but is commonly used during breastfeeding. Milk thistle lacks sufficient safety data for both.
- Medication Interactions: Both herbs can interact with medications, including antacids, diabetes medications, or liver-targeted drugs. Always consult a healthcare provider.
- Dosage: Capsules or regulated extracts are safer than high-concentration teas to avoid nausea or cramping.
Final Thoughts
Herbal remedies like blessed thistle and milk thistle have been used for centuries, but it’s essential to understand their unique properties. Blessed thistle is particularly effective for lactation and digestive support, while milk thistle offers potential liver and antioxidant benefits.
When deciding between these herbs, consider your health goals. Blessed thistle vs milk thistle is more than a comparison. It’s a guide to choosing the right supplement for your needs. Always consult a healthcare professional before starting any new herbal treatment, especially during pregnancy or when managing chronic conditions.