A simple preparation of a traditional Chinese medicinal seed, Zizyphi spinosi semen (ZSS), may hold the key to preventing neurodegenerative diseases and age-related cognitive decline, according to a new study published in eLife by researchers from Osaka Metropolitan University and Cerebro Pharma Inc.

Ancient Remedy, Modern Promise

Zizyphi spinosi semen (ZSS), the seed of Ziziphus jujuba var. spinosa, has long been used in traditional Chinese medicine to calm the mind and treat insomnia and anxiety. But its potential goes far beyond. In this study, scientists tested different preparations of ZSS in mouse models of Alzheimer’s, frontotemporal dementia, and Parkinson’s disease—uncovering powerful effects on brain health.

The most effective preparation? Simply crushed seeds, used without extraction.

Cognitive and Motor Benefits in Disease Models

Oral administration of the crushed ZSS powder significantly improved memory and motor functions in mouse models:

• In Alzheimer’s models, ZSS reduced beta-amyloid accumulation and improved memory performance.

• In frontotemporal dementia models, it decreased phosphorylated tau and enhanced synaptic health.

• In Parkinson’s models, ZSS reversed motor deficits, reduced alpha-synuclein toxicity, and boosted neurogenesis.

These effects were consistently stronger than those observed from standard hot water extracts or extraction residues.

Reversing Cognitive Aging in Healthy Mice

Strikingly, even in healthy aged mice, daily intake of ZSS powder rejuvenated cognitive performance to levels comparable with young mice. This was accompanied by reduced markers of cellular senescence and DNA oxidation, enhanced neurogenesis, and elevated levels of brain-derived neurotrophic factor (BDNF), a molecule essential for brain repair and learning.

Beyond the Known Ingredients

The study also showed that the cognitive benefits of ZSS are not explained by its known active ingredients—jujuboside A, jujuboside B, and spinosin—as these compounds alone had only modest effects. This suggests that the whole seed, in its crushed form, contains a broader mix of beneficial molecules that work synergistically.

A Safe, Affordable Preventive Strategy?

While pharmaceutical approaches to neurodegenerative diseases often focus on single targets and come with high costs or risks, the ZSS powder stands out as:

• Safe: Not classified as a pharmaceutical in Japan.

• Affordable: Readily available and simple to prepare.

• Noninvasive: Suitable for long-term dietary use.

The authors conclude that ZSS crushed powder is a promising candidate for functional foods aimed at neuroprotection and healthy brain aging.

Cosmael ThinkLab Commentary

This research underscores the untapped potential of whole-plant preparations in neurodegenerative disease prevention. The broad-spectrum efficacy of crushed ZSS across Alzheimer’s, Parkinson’s, and frontotemporal dementia models highlights its promise not just as a natural nootropic, but also as a foundational element in next-generation dietary neurotherapeutics. However, clinical trials in humans are essential to confirm its safety and effectiveness over long-term use.

Source:
Umeda T., Sakai A., Uekado R., Shigemori K., Nakajima R., Yamana K., Tomiyama T. (2024). Simply crushed Zizyphi spinosi semen prevents neurodegenerative diseases and reverses age-related cognitive decline in mice. eLife, 13, RP100737. https://doi.org/10.7554/eLife.100737