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Napiers Milk Thistle 90 Capsules 4000mg

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Milk thistle (Silybum marianum) is a traditional herbal supplement used for over 2,000 years to support liver health. Its active compound, silymarin, is a powerful antioxidant that helps protect liver cells from oxidative stress and supports the liver’s natural regeneration processes.

Our high-strength formula provides the equivalent of 4000mg of milk thistle per capsule, standardised to 80% silymarin for consistent potency and quality.

Milk thistle is commonly used by those looking to support liver function, digestion, and overall wellbeing, particularly in modern lifestyles where the liver plays a key role in processing toxins, alcohol, and metabolic by-products.

Unlike harsh “detox” products, milk thistle works by supporting the liver itself — the body’s primary detoxification organ.

Formulated to premium standards, this supplement combines traditional herbal knowledge with modern extract standardisation to deliver reliable, high-quality support.

Product Highlights

  • Supports liver health and normal liver function
  • Traditionally used to support the body’s natural cleansing processes
  • High-strength 4000mg equivalent per capsule
  • Easy one-a-day formula
  • 90 day supply

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How Does Milk Thistle Work?

Milk thistle works primarily through its active compound, silymarin.

Silymarin has antioxidant and anti-inflammatory properties, which may help:
- Protect liver cells from damage caused by toxins and oxidative stress
- Support the liver’s natural repair and regeneration processes
- Maintain healthy liver function over time

Because the liver plays a central role in detoxification, supporting liver health is key to the body’s natural ability to process and eliminate unwanted substances.

How to Take Milk Thistle

Take 1 capsule daily, or as directed by a healthcare professional.

Milk thistle supplements are often standardised to silymarin content, with typical daily intakes ranging from 200–400 mg of silymarin depending on individual needs.

Key Ingredients

Brown Rice Powder, Milk Thistle 20:1 Extract min 80% Silymarin, Hydroxypropyl Methylcellulose (Vegetable Cellulose Capsule), Anti-caking Agent (Silicon Dioxide). Allergens: None
Keep out of reach and sight of children and do not exceed recommended daily intake. Food supplements should not be used as a substitute for a balanced and varied diet. If under medical supervision, pregnancy or breastfeeding seek guidance from your medical practitioner before using this product.
Store in a cool, dark place out of direct sunlight and humid conditions. Do not store above 25°C. Store out of the immediate reach of children.

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165 Years Of Edinburgh Heritage

All of our products are formulated by expert herbalists at Napiers. With 165 years of experience.

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Frequently asked questions

Milk thistle is traditionally used to support liver health and help protect liver cells from oxidative stress.

Milk thistle does not act as a direct detox cleanse, but it supports the liver, which is the body’s primary detoxification organ.

Milk thistle is widely used as a liver-support supplement due to its active compound silymarin, which has antioxidant properties.

Typical intake ranges from 200–400 mg of silymarin per day, depending on the formulation and individual needs.

Milk thistle is generally well tolerated, though mild digestive symptoms may occur in some individuals.

Milk thistle is one of the most widely used herbal supplements for liver support, particularly due to its long history of use and standardised extracts.

Milk thistle does not act like GLP-1 medications such as semaglutide. It may support metabolic and liver health, which are important for overall wellbeing. It should not be considered a substitute for GLP-1 treatments.

Milk thistle is commonly taken daily as part of a long-term wellness routine, but you should consult a healthcare professional for personalised advice.

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Shipping & Returns

• Free UK shipping over £65

• £4.95 UK Next Day Service shipping on all orders less than £64.99

• Orders typically dispatched within 1-3 working days

• Free returns within 30 days. See our refund policy for more info.

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