Cleansing Herbs: What Dandelion, Burdock and Parsley Do

Long before juice cleanses came in bottles, herbalists reached for a familiar set of plants to "clean the blood" in spring: dandelion, burdock, red clover, parsley and milk thistle. Many of them are simply bitter greens and roots that appear just as winter ends.

Your liver and kidneys do the real detoxifying, all day, without help from any herb. What these plants can do is make it easier to eat more greens, fibre and flavour. A few of them have genuine research behind them, and a few need to be treated with respect.

The traditional cleansing herbs, one by one

Everyday foods: use freely

Dandelion greens and root. The leaves are a bitter green rich in vitamins A and K, and the root is traditionally used as a mild diuretic and digestive bitter. NIH notes there is little high-quality research on dandelion, but the greens are simply a nutritious vegetable. Pick them young, when they are least bitter, and never from sprayed lawns.

Parsley. More than a garnish: a generous handful adds vitamin C, vitamin K and folate. It is traditionally used as a mild diuretic and breath freshener.

Cilantro (coriander leaf). You may read that cilantro "chelates heavy metals" such as mercury and lead. That claim comes from very small, early studies and has not held up. Enjoy cilantro for its flavour and nutrients, and leave heavy-metal problems to a doctor.

Garlic. Some research suggests garlic may modestly lower blood pressure and cholesterol, though results are mixed. It is a wonderful cooking ingredient either way.

Burdock root (gobo). A long, earthy root popular in Japanese cooking and sold in Asian grocers and health food shops. It is a good source of inulin, a prebiotic fibre that feeds healthy gut bacteria.

Flaxseed. Ground flaxseed is rich in fibre and omega-3 fats, and NIH reports it can help with constipation. Grind it just before use, or buy it ground and keep it in the fridge.

Turmeric, oregano, rosemary and peppermint. Aromatic herbs and spices that make plant-heavy meals taste good, which is the most practical detox tip there is.

Herbs to treat like medicine

Milk thistle. The best-studied liver herb. Research on liver disease is mixed, and it is generally well tolerated. But it can affect blood sugar and may interact with some medicines, so talk to your doctor first, especially if you have diabetes.

Licorice root. Real licorice, not the sweet, contains glycyrrhizin. In large amounts or over long periods it can raise blood pressure and lower potassium. Deglycyrrhizinated licorice (DGL) doesn't carry this risk.

Echinacea and red clover. Echinacea is used for colds, with modest evidence at best. Red clover contains plant oestrogens (isoflavones), so it is not recommended if you have had an oestrogen-sensitive cancer or are pregnant.

A bitter greens detox salad

This is a bright, slightly bitter salad that uses the everyday herbs above. The yoghurt and turmeric dressing softens the bitterness.

Where "cleansing" does make sense

If you want to support your body's own detox systems, the evidence points to ordinary things: plenty of vegetables and fibre, enough water, less alcohol, no smoking, regular movement and good sleep. Bitter greens and herbs fit neatly into that. Expensive powders and multi-day cleanses don't, and some can be harmful.

The bottom line

Traditional cleansing herbs are best thought of as flavourful greens, not flushes. Eat dandelion, parsley, cilantro and garlic generously. Treat milk thistle, licorice and red clover as medicines. And let your liver do the job it is already doing.