Madder Drug Interactions, Uses, Safety & More

Madder is a flowering plant best known for its root, which contains bright red pigments. The most commonly used species is Rubia tinctorum, sometimes called common madder or dyer's madder. It grows in parts of Europe, the Middle East, and Asia, and has been cultivated for centuries.

For thousands of years, madder root was prized as a natural dye to color cloth and leather a deep red. In traditional medicine, the root was also used in herbal remedies, especially for problems involving the kidneys, bladder, and urinary tract.

Today madder is far less common as a supplement. In some countries it has been restricted or removed from herbal products because of safety concerns about certain compounds in the root.

People have traditionally used madder root for kidney stones, bladder stones, and other urinary complaints. It has also been used for menstrual problems and as a general digestive remedy. These uses come from folk tradition, not from strong modern science.

Overall, the evidence is weak and insufficient. Most of what we know comes from laboratory studies, animal research, and historical use rather than well-designed human clinical trials. There is not enough reliable evidence to say madder works for any health condition.

Because of safety concerns, researchers have largely moved away from studying madder as an oral medicine. We do not recommend relying on it to treat or prevent any disease.

Madder root contains a group of colored compounds called anthraquinones, including substances such as alizarin and purpurin. These give the root its red color and are also thought to be responsible for many of its biological effects.

Some laboratory studies suggest these compounds may bind to minerals like calcium and magnesium, which is one reason madder was traditionally used for kidney and bladder stones. Other lab work has looked at possible effects on bacteria and on the urinary system.

It is important to understand that these mechanisms are mostly based on test-tube and animal studies. They do not prove that madder is safe or effective when taken by people.

Madder raises real safety concerns. One of its compounds, sometimes called lucidin, has shown the ability to damage DNA (genotoxicity) in laboratory tests, and animal studies have raised worries about a possible cancer risk. Because of this, some health authorities have restricted or banned madder root products for internal use.

For these reasons, we suggest avoiding madder as an oral supplement. People with kidney disease, liver problems, or a history of cancer should be especially cautious.

Pregnancy: Avoid madder. It has traditionally been used to bring on menstruation and may affect the uterus, which could be harmful in pregnancy. Breastfeeding: Also avoid, since safety is unknown and the root's pigments can pass into body fluids.

Always talk with a pharmacist or doctor before using any madder product.

One well-known and harmless effect is that madder can turn urine and sometimes sweat or tears a reddish or pinkish color because of its pigments. This is not dangerous by itself but can be alarming if unexpected.

Other possible side effects include stomach upset and digestive discomfort. The more serious concern is not a typical "side effect" but the potential for DNA damage and cancer risk linked to certain root compounds seen in laboratory and animal research.

If you have taken a madder product and feel unwell, stop using it and contact a healthcare professional.

There is no established safe or effective dose of madder for any health condition. Because of the safety concerns described above, no standard medicinal dose can be recommended.

If you encounter a madder product, follow the directions on the label and check with a pharmacist first. In general, we do not recommend taking madder root internally. Its safer, well-established use is as a fabric dye rather than as a supplement.