Quick summary

Naringenin is a flavanone antioxidant polyphenol studied for its potential antioxidant and anti-inflammatory effects. Human clinical evidence remains limited and inconclusive, and no established intake guidelines exist. It is primarily found in citrus fruits like grapefruits and oranges and is commonly consumed as oral capsules or extract powders.

What is it?

Naringenin is a naturally occurring flavanone, a subclass of polyphenols known for their antioxidant properties. It is present in various plant sources, predominantly in citrus fruits such as grapefruits and oranges. As a dietary supplement, naringenin is investigated mainly for its potential ability to influence oxidative stress and inflammation.

How it may work in the body

Naringenin is proposed to act primarily as an antioxidant and anti-inflammatory agent. Its potential mechanisms include:

  • Scavenging free radicals and reducing oxidative stress
  • Modulating inflammatory signaling pathways

These mechanisms have been identified mostly through in vitro (test tube) studies and animal models. Human evidence directly supporting these mechanisms is insufficient and requires further research.

Common supplement forms

  • Oral capsules
  • Extract powders

Typical dosage and how it is used

There is currently no established official recommended daily intake (RDA) or adequate intake (AI) for naringenin. Clinical trials investigating naringenin have used various dosages, but no consensus dosing guidelines have been established.

Due to limited human safety data, cautious dosing is advised when using naringenin supplements. Consumers should consult healthcare professionals before starting supplementation, particularly if they have underlying health conditions or take other medications.

Natural sources

  • Citrus fruits such as grapefruits and oranges

Absorption and bioavailability

Information on the absorption and bioavailability of naringenin in humans is limited. Variability in absorption may depend on the supplement form or food matrix consumed. More research is needed to characterize how efficiently naringenin is absorbed and metabolized.

Potential benefits: what does the evidence say?

Antioxidant and Anti-inflammatory Effects

Preliminary human studies suggest naringenin may possess antioxidant and anti-inflammatory properties. However, the clinical evidence remains limited, small in scale, or methodologically weak, making it difficult to draw firm conclusions.

The majority of data supporting these potential benefits originates from preclinical research, including animal experiments and cellular studies. Therefore, human health benefits are not clearly established.

Side effects and safety

No significant side effects have been consistently reported in the limited studies available. However, conclusive human safety data are lacking. Similarly, toxicity or adverse effects from overuse have not been well characterized.

Safety during pregnancy, breastfeeding, or in other special populations has not been established. Due to the absence of robust safety data, caution is recommended.

Drug and supplement interactions

Currently, no well-documented drug or supplement interactions with naringenin have been reported. However, given the limited data, individuals using medications or other supplements should consult with healthcare providers before using naringenin.

Who should be careful?

People who are pregnant or breastfeeding, those with medical conditions, individuals taking medications, or anyone planning surgery should seek professional healthcare advice before starting naringenin supplementation. The limited safety and interaction information warrant cautious use.

Pregnancy, breastfeeding and special populations

Safety of naringenin supplement use during pregnancy and breastfeeding has not been established. Similarly, evidence is scarce for its use in children, elderly individuals, or people with chronic illnesses. Consultation with a healthcare professional is recommended for these groups.

Quality, standardization and what to look for

When choosing naringenin supplements, select products from reputable manufacturers that provide transparent labeling and third-party testing. Currently, there is no standardized marker or dosage for naringenin supplements due to limited regulation and research. Consumers should be wary of products making unverified health claims.

Frequently asked questions

  • Is naringenin the same as naringin?
    Naringin is a related flavonoid glycoside found in citrus fruits that is metabolized in the body to naringenin, which is the aglycone form. The two compounds are related but distinct.
  • Are there any approved health claims for naringenin?
    No, to date there are no EU-authorized health claims available for naringenin based on the supplied evidence.
  • Can I get enough naringenin from eating fruits?
    Yes, consuming citrus fruits like grapefruits and oranges provides natural sources of naringenin, though the actual amount absorbed can vary.
  • Does naringenin interact with grapefruit juice effects?
    Grapefruit juice is known to affect metabolism of certain medications. While naringenin is one compound in grapefruit, its specific interaction profile requires more research, so caution is advised.

Evidence limitations

  • Lack of robust human clinical trials
  • Most evidence derives from in vitro or animal studies
  • No established dosage guidelines
  • Incomplete data on safety and interactions

References

Disclaimer

This page is for informational purposes only. Naringenin supplements have limited clinical evidence for health benefits and safety in humans. They are not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before starting any new supplement, especially if you are pregnant, breastfeeding, have a medical condition, take medications, or are planning surgery.

Last reviewed

June 2024