Betel nut

The Betel nut, the seeds of the betel palm (Areca catechu), is a widespread plant in South and Southeast Asia. It is often chewed together with betel pepper leaves (Piper betle) and is known for its stimulating effect. The use of the Betel nut has a long tradition in cultural and social contexts, but it is also controversially discussed because of its potential health effects.

What benefits does the Betel nut offer?

In traditional medicine, the Betel nut is used for various purposes. Some of these purposes have also been researched in studies, above all by examining individual active compounds of the Betel nut. As usual, these studies are listed after the traditional use, but as always, it should be kept in mind that not all studies are readily transferable:

  • Stimulation and alertness: The Betel nut contains arecoline, an alkaloid that has a stimulating effect on the central nervous system and can promote alertness and concentration (1,2).
  • Digestive support: In folk medicine, the Betel nut is used to support digestion and relieve stomach complaints (3).
  • Parasite elimination: In some traditional healing practices, the Betel nut is used to treat intestinal parasites (4).

How does the Betel nut work?

The effects of the Betel nut are mainly based on the alkaloids it contains, especially arecoline:

  • Arecoline: This active compound has a stimulating effect on the nervous system, similar to caffeine. It stimulates salivation and digestion and creates a feeling of alertness (1,2).
  • Polyphenols and flavonoids: These possess antioxidant properties and could have anti-inflammatory effects (5,6,7).
  • Tannins: These have an astringent effect and can relieve gastrointestinal complaints (8,9).

Intake recommendation

The Betel nut is traditionally chewed raw, dried, or roasted, often in combination with betel pepper leaves and lime. There is no standardized dosage, and consumption varies greatly depending on the cultural context. In some cultures, it is consumed on special occasions or practiced as a social custom.

What risks does the use of the Betel nut entail?

  • Health risks: Long-term consumption of the Betel nut is associated with an increased risk of oral cancer, dental and gum diseases, and oral submucous fibrosis, a condition that can lead to hardening and restriction of the mouth opening (10).
  • Dependence: Arecoline has an addictive potential, and regular consumers can develop a dependence (11).
  • Side effects: Possible side effects include nausea, vomiting, rapid heartbeat, and elevated blood pressure. Excessive consumption can lead to serious health problems (10).
  • Interactions: The consumption of the Betel nut can interact with certain medications, especially those that affect the central nervous system.

Conclusion

The Betel nut (Areca catechu) is a culturally significant plant with stimulating properties that has been used in Asia for centuries. Despite its traditional uses, the consumption of the Betel nut carries considerable health risks, especially with long-term use. Because of the potential side effects and the risk of serious health damage, regular consumption is discouraged. Further research is required to find safe forms of use and to better understand the health effects.

Sources:

  1. Wang, D., Sun, Y., Liu, J., Sun, J., Fan, B., Lu, C., & Wang, F. (2024). Research on the Anti-Fatigue Effects and Mechanisms of Arecoline in Sleep-Deprived Mice. Nutrients, 16(16), 2783. https://doi.org/10.3390/nu16162783
  2. Chu N. S. (2001). Effects of Betel chewing on the central and autonomic nervous systems. Journal of biomedical science, 8(3), 229–236. https://doi.org/10.1007/BF02256596
  3. Ying L, Yang Y, Zhou J, Huang H, Du G. Effect of chewing betel nut on the gut microbiota of Hainanese. PLoS One. 2021 Oct 14;16(10):e0258489. doi: 10.1371/journal.pone.0258489. PMID: 34648581; PMCID: PMC8516201.
  4. Tangalin, M. G. (2011). Anthelminthic Effects of Processed Mature Betel Nut as Dewormer to Native Chicken and Small Ruminants (Sheep and Goats). Asian Journal of Health, 1.
  5. Tsao R. Chemistry and biochemistry of dietary polyphenols. Nutrients. 2010 Dec;2(12):1231-46. doi: 10.3390/nu2121231. Epub 2010 Dec 10. PMID: 22254006; PMCID: PMC3257627.
  6. Yahfoufi N, Alsadi N, Jambi M, Matar C. The Immunomodulatory and Anti-Inflammatory Role of Polyphenols. Nutrients. 2018 Nov 2;10(11):1618. doi: 10.3390/nu10111618. PMID: 30400131; PMCID: PMC6266803.
  7. Al-Khayri JM, Sahana GR, Nagella P, Joseph BV, Alessa FM, Al-Mssallem MQ. Flavonoids as Potential Anti-Inflammatory Molecules: A Review. Molecules. 2022 May 2;27(9):2901. doi: 10.3390/molecules27092901. PMID: 35566252; PMCID: PMC9100260.
  8. Chen Y, Tian L, Yang F, Tong W, Jia R, Zou Y, Yin L, Li L, He C, Liang X, Ye G, Lv C, Song X, Yin Z. Tannic Acid Accelerates Cutaneous Wound Healing in Rats Via Activation of the ERK 1/2 Signaling Pathways. Adv Wound Care (New Rochelle). 2019 Jul 1;8(7):341-354. doi: 10.1089/wound.2018.0853. Epub 2019 Jul 2. PMID: 31737421; PMCID: PMC6855284.
  9. Molino, S., Lerma-Aguilera, A., Jiménez-Hernández, N., Gosalbes, M. J., Rufián-Henares, J. Á., & Francino, M. P. (2021). Enrichment of food with tannin extracts promotes healthy changes in the human gut microbiota. Frontiers in Microbiology, 12, 625782. https://doi.org/10.3389/fmicb.2021.625782
  10. NSW Health, (2021), Betel nut products and preparations, https://www.health.nsw.gov.au/oralhealth/prevention/Pages/betel-nut-preparations-use.aspx
  11. Stokes C, Pino JA, Hagan DW, Torres GE, Phelps EA, Horenstein NA, Papke RL. Betel quid: New insights into an ancient addiction. Addict Biol. 2022 Sep;27(5):e13223. doi: 10.1111/adb.13223. PMID: 36001424; PMCID: PMC9552247.