Jujube seed

What is jujube seed?

Jujube (Ziziphus jujuba) is a small tree whose sweet, date-like fruit is eaten fresh or dried in China, Korea and the Middle East. The seed of the sour or wild variety, Ziziphus jujuba var. spinosa, is known in Chinese medicine as Suan Zao Ren. It is one of the most widely used traditional herbs for insomnia and restlessness; a 2023 review of its quality control notes that more than 155 proprietary Chinese medicines contain it.

What the research says

Sleep. A 2023 systematic review and meta-analysis included 9 randomized trials of people with insomnia or sleep disturbance. Compared with placebo, Suanzaoren led to a moderate improvement in self-reported sleep quality, and in some comparisons it performed similarly to benzodiazepines or cognitive behavioral therapy at four weeks. Long-term results were mixed, it did not increase major adverse events, and the authors called for larger, well-powered trials.

A review of the seed’s chemistry and pharmacology describes saponins (jujubosides), flavonoids and other compounds that appear to act on GABA and serotonin systems, which could explain a calming effect. The specific active components still need confirmation.

Oral health. We found no research supporting jujube seed for teeth or gums. Its presence in an oral health formula is not explained by the evidence.

How it’s used in supplements

In traditional Chinese medicine, sour jujube seed is used in decoctions and formulas at doses of several grams. Western supplements sell it as capsules or extracts for sleep. When a label lists “jujube seed” without specifying the variety or extract strength, it is hard to compare with research, and a 50 mg dose is a small fraction of traditional amounts.

Jujube seed appears to be well tolerated in the studies available, but because it may have sedative effects, people taking sleep medications, benzodiazepines, antidepressants or alcohol should be cautious about combining them. Safety in pregnancy and breastfeeding has not been established. If you have persistent insomnia, a doctor can look for underlying causes such as sleep apnea, and cognitive behavioral therapy for insomnia has strong evidence as a first-line approach.

Sleep and oral health are not entirely unrelated: poor sleep and stress can go along with teeth grinding and with neglected oral hygiene routines. But there is no evidence that jujube seed addresses either one. If you grind your teeth at night or wake with jaw pain, a dentist can assess you and may suggest a night guard.