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Limited evidenceJoints & skin

Yucca

A saponin-rich desert root long sold for arthritis. The anti-inflammatory chemistry is real, but the human evidence is one small trial from decades ago plus reviews; most modern research is in livestock.

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What the science says

  • Arthritis symptom relief Limited evidence

    A review of Yucca schidigera describes steroidal saponins and stilbene polyphenols with anti-inflammatory activity and cites an old, small and poorly reported clinical trial in arthritis. No modern randomized placebo-controlled trial exists in humans.

  • Antioxidant and gut effects Limited evidence

    An updated phytochemistry and pharmacology review confirms antioxidant, antiprotozoal and urease-inhibiting activity, mostly demonstrated in vitro and in animal feeding studies where yucca is used to reduce ammonia in manure.

Dosage & safety

Studied doseNo validated human dose. Capsule labels commonly give 400–1,000 mg of root powder once or twice daily; the saponin content of commercial products is not standardized.
SafetySaponins are irritating to the gut lining and can cause nausea, cramping and diarrhoea, especially at higher doses or with long-term use. They may reduce absorption of fat-soluble vitamins. Avoid in pregnancy and breastfeeding.

How to take it

TimingTiming does not matter.
With food?Take it with meals — saponins are gut irritants and cause cramping and diarrhoea on an empty stomach.
Worth knowingSaponin content is not standardised between brands, so the same label dose can be far harsher on the gut from one product to the next.

Interactions

With other supplements

  • vitamins A, D, E and K

    Saponins bind fats and bile in the gut and can reduce absorption of fat-soluble vitamins. separate by at least 2 hours

Well-established interactions only — this is not a complete list. Always tell your doctor and pharmacist what you take.

Frequently asked questions

Does yucca work for arthritis?

The evidence for yucca in arthritis is limited: it rests on one old, small and poorly reported clinical trial plus reviews of its anti-inflammatory saponins. No modern randomized placebo-controlled trial in humans exists.

How much yucca root should I take?

Yucca has no validated human dose; labels commonly give 400–1,000 mg of root powder once or twice daily. Saponin content is not standardised, so the same label dose can be much harsher on the gut from one brand to the next.

Does yucca cause stomach upset?

Yes: yucca's saponins irritate the gut lining and can cause nausea, cramping and diarrhoea, especially at higher doses or with long-term use. Take yucca with meals, and avoid it in pregnancy and breastfeeding.

Does yucca affect vitamin absorption?

Yucca saponins bind fats and bile in the gut and can reduce absorption of vitamins A, D, E and K. Separate yucca from fat-soluble vitamin supplements by at least 2 hours.

Scientific references

Related in Joints & skin

Herbal medicines: what the evidence says (335)