Bidens pilosa

A food supplement to support your health sometimes known as black-jacks or Spanish needles. 

Extracts such as tinctures or essences offer a convenient alternative to herbal teas. They may also be used in food, food supplements, cosmetics and as a starter ingredient by herbalists in prescription formulas.

Please note the different strengths of the tinctures on offer and select the correct one for you.


Bidens pilosa extracted in sugar beet ethanol (alcohol). The part used is the dried leaf. The strength is 1:5 25%. Suggested serving size of up to 2 to 4 ml. 


Adults: Take up to 2 to 4ml, 2 to 3 times a day unless otherwise directed by your practitioner.


Only use this tincture under the advice of a medical or herbal medicine practitioner.


Caution in use by those with diabetes or using diabetic medications as taking Bidens may alter your blood glucose and insulin levels. People allergic to members of the aster family, such as ragweed, may also be allergic to Bidens.

Do not use if you are pregnant or if you are planning to become pregnant without your doctor's approval. Not all herbs are suitable in breastfeeding or for young children, or if you are unwell, have health concerns or an ongoing illness.

Please visit our Herbs A-Z section to check when, or when not to, take this herb. If in doubt, please ask us or your medical herbalist.

Side effects

Some herbs can cause side effects. For more information about potential side effects of this herb please visit our Herbs A-Z section. If a side effect is experienced please let us know.

Drug Interactions

Bidens may potentiate the action of tetracycline.

Foods, herbs and food supplements can interact with some medicines. For more information on potential interactions for this herb please visit our Herbs A-Z section and consult your medical herbalist or doctor before taking this herb.

More Information

In-depth information about the traditional uses of this herb can be found in our Herbs A-Z section.

A useful monograph on Bidens:

Arlene P. Bartolome, Irene M. Villaseñor, and Wen-Chin Yang, Bidens pilosa L. (Asteraceae): Botanical Properties, Traditional Uses, Phytochemistry, and Pharmacology,” Evidence-Based Complementary and Alternative Medicine, vol. 2013, Article ID 340215, 51 pages, 2013.

Napiers tincture


Add to BagBidens pilosa Blackjack 1:5 25% tincture 100ml £12.75
Add to BagBidens pilosa Blackjack 1:5 25% tincture 500ml £45.25
Add to BagBidens pilosa Blackjack 1:5 25% tincture 1L £80.25

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