Milk thistle

What is milk thistle?

Milk thistle is a distinctive botanical with purple flower heads, spiny leaves and a long place in herbal traditions. Its botanical name is Silybum marianum. In our tincture, the seeds are the part used, alongside organic alcohol and purified water.

This guide looks beyond the plant's familiar name to explain the ingredient itself: which part is used, what the term silymarin means and how to compare different preparations. You will also find both ways to buy our milk thistle tincture below.

• Botanical nameSilybum marianum
• Plant part in our tinctureSeeds
• Liquid mediumOrganic alcohol and purified water
• In our rangeStandalone tincture and Liver Detox Duo

From flowering plant to seed preparation

The flower is often used to illustrate milk thistle, but our tincture is made from the seeds rather than the purple flower heads. Checking the plant part is a useful habit when reading any botanical label.

In botanical and herbal references, you may also see milk thistle described as a fruit ingredient. The small, dry, seed-like fruits are commonly called seeds in product descriptions. That terminology explains why references may use “fruit” while our ingredient list says “seeds”.

Milk thistle belongs to the daisy family. Its long association with liver-focused herbal traditions is part of its history, but a traditional plant name alone does not describe the composition or strength of a finished extract.

Understanding silymarin

Silymarin is the name given to a group of plant compounds associated with milk thistle. It is not another name for the whole plant, and it is not a fixed quantity that can be assumed to be present in every product carrying a milk thistle label.

This distinction matters when comparing a seed powder, a liquid tincture and a standardised dry extract. They may begin with the same botanical material, but their processing and specifications can differ.

A product that declares a silymarin percentage or amount per serving should have information supporting that figure. Our tincture listing identifies its ingredients; we do not convert that into an invented silymarin dose. The colour of a liquid or how strongly it tastes cannot establish that measurement.

Tinctures, powders and standardised extracts

Choose a format by reading its full description, rather than comparing product names alone.

• Seed powder: milled plant material. Check the label for the plant part, serving and any added ingredients.
• Liquid tincture: a botanical preparation extracted into a liquid medium. Our product uses organic alcohol and purified water.
• Standardised extract: an extract specified to contain a controlled amount or proportion of particular constituents. This requires information specific to that extract.
• A set of tinctures: separate products sold together, with the directions on each bottle still applying.

A milligram figure on a capsule cannot be directly translated into a number of tincture drops without the relevant product specifications. Likewise, a bottle's volume tells you how much liquid it holds, not how much of one plant compound each serving supplies.

Our alcohol in tinctures guide explains more about the liquid preparation method.

Milk thistle in our range

The duo is supplied as separate tinctures, rather than one combined formula. Explore our dandelion root guide for the other botanical in the set.

Choosing a preparation for your routine

Start with the ingredients. Our tincture contains alcohol, so it will not suit someone specifically seeking an alcohol-free product. Adding a serving to water or juice dilutes it but does not remove the alcohol.

Follow the bottle's directions for shaking, measuring and dilution. Use the supplied dropper as directed, and avoid estimating a serving with a kitchen spoon. If you already use other herbal products, check their ingredient lists for overlap.

Our product advises avoiding it if you are allergic to plants in the daisy family, and seeking advice before use during pregnancy or breastfeeding, with medication or with a medical condition. Use that suitability information when deciding whether the preparation fits your circumstances.

If you have a question about an ingredient or label, contact us with the product name. For a question about a particular bottle, include its batch details.

Storage and handling

Keep the tincture tightly closed in a cool, dark place away from direct sunlight and heat, and out of reach of children. Follow the date and any additional storage instructions on the label.

Keep the dropper tip clean and avoid touching it to your mouth or other surfaces. Replace it after measuring a serving. Retain the original bottle and label so the ingredient list and directions remain easy to check.

Prepare diluted servings when you intend to use them. The storage guidance for the original tincture should not be assumed to apply to a large mixture diluted in water or juice.

Milk thistle questions answered

Keep exploring

Continue with dandelion root, learn more about alcohol in tinctures, or browse the Learn ingredient library.

Botanical reference: Royal Botanic Gardens, Kew: Silybum marianum. This identifies the plant; it is not an analysis of our finished tincture.