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Limited evidenceSleep & relaxation

Jujube (Ziziphus)

The sleep evidence belongs to jujube seed (suan zao ren) inside multi-herb Chinese formulas, not to the sweet jujube fruit most supplements sell. Meta-analyses of those formulas are positive but built on small, high-risk-of-bias trials.

What the science says

  • Chronic insomnia, as part of Suanzaoren decoction Limited evidence

    A meta-analysis of 12 RCTs in 1,311 patients with chronic insomnia found Suanzaoren decoction reduced Pittsburgh Sleep Quality Index scores by 1.94 points used alone (95% CI -3.80 to -0.07) and 3.35 points when added to conventional hypnotics, with a higher clinical response rate (RR 1.22). The catch is substantial: this is a five-herb formula (jujube seed plus poria, chuanxiong, anemarrhena, licorice), almost all trials were Chinese-language and of variable quality, and the authors themselves called for larger multicentre studies.

  • The fruit and the seed are not interchangeable Moderate evidence

    Sedative activity is attributed to jujubosides and the flavonoid spinosin, concentrated in the seed of Ziziphus jujuba var. spinosa (Ziziphi Spinosae Semen, suan zao ren). The sweet red fruit (da zao) sold as dried snack food and in most Western 'jujube' capsules is a different preparation with a different constituent profile. Check whether the label says seed or fruit — many do not.

  • Jujube on its own for sleep or anxiety Limited evidence

    There is no adequately powered, placebo-controlled trial of a jujube seed extract as a single agent for insomnia or anxiety in a Western population. Mechanistic work points to GABA-A and serotonergic modulation in rodents, but this has never been translated into a standalone clinical result.

Dosage & safety

Studied doseTraditional decoctions use 10-15 g of crushed jujube seed daily, usually within a formula; Suanzaoren decoction trials used the classical formula ratios rather than isolated jujube. Commercial seed extracts are sold at 500-1000 mg/day, standardised to jujubosides or spinosin. The fruit is eaten as food with no defined therapeutic dose.
SafetyWell tolerated in trials; the insomnia meta-analysis actually reported fewer adverse events with the herbal formula than with comparator hypnotics (RR 0.30). Expect additive sedation with alcohol, benzodiazepines and other CNS depressants. Jujube preparations have been reported to affect CYP-mediated drug metabolism and there is a case report of interaction with venlafaxine, so keep it away from narrow-therapeutic-index drugs. The dried fruit is high in sugar — relevant if you are managing blood glucose. Avoid in pregnancy (insufficient data). Not banned in sport.

Scientific references

Where to buy

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