Quick Summary

Carica papaya (papaya) is a tropical plant whose leaves, fruit, and extracts have been studied for various potential therapeutic applications. Scientific investigations have mainly focused on its role in dengue infection management, oral health, wound healing, and as a source of bioactive compounds. Clinical evidence suggests possible platelet-enhancing and immunomodulatory effects in dengue, antimicrobial properties in dentistry, and wound healing support. However, the overall clinical evidence remains limited and further rigorous trials are needed. Safety evaluations indicate it is generally well tolerated in short-term use but long-term safety data and thorough herb-drug interaction studies are limited.

What is it?

Carica papaya, commonly known as papaya, is a tropical plant cultivated for its fruit and medicinal properties. Both the leaves and fruit extracts have been explored for their bioactive compounds and potential health-related effects.

Traditional Uses

  • Dengue fever management, particularly to increase platelet counts
  • Support in oral health and dental care as antimicrobial agents
  • Wound healing applications through topical formulations
  • Ethnobotanical use for anti-parasitic and anthelmintic purposes in animals

Active Compounds

Carica papaya contains various bioactive compounds including antioxidants and anti-inflammatory agents. These constituents are thought to contribute to its potential therapeutic effects, although detailed phytochemical profiles and mechanisms require further elucidation.

Potential Benefits with Evidence Levels

  • Dengue infection (Moderate evidence): Systematic reviews and meta-analyses suggest that papaya leaf extract or juice may increase platelet counts and potentially reduce hospital stay duration in dengue patients. However, the evidence is limited by small sample sizes and heterogeneous methods. No conclusive data support effects on plasma leakage or mortality. (Rajapakse et al., 2019; Aynekulu et al., 2025; Teh et al., 2022)
  • Oral health and dental care (Low to moderate evidence): Herbal oral care products containing papaya extracts may reduce dental plaque and gingivitis similarly to conventional treatments. Antimicrobial activity against oral pathogens like Streptococcus mutans has been reported, but study quality is low and results are inconsistent. Further trials are needed. (Mehta et al., 2024; Ghandehari et al., 2025)
  • Wound healing (Preclinical and preliminary clinical evidence): Preclinical studies and limited clinical evaluations indicate papaya extracts may support wound healing through antioxidant and antimicrobial properties. Clinical data remain sparse. (Floriano et al., 2025)
  • Anti-parasitic and anthelmintic use (Ethnobotanical and preclinical): Traditionally used for controlling gastrointestinal parasites in animals, some preclinical evidence suggests possible activity against human parasites. Human clinical trials are lacking. (Malatji et al., 2025)
  • Metabolic and other health conditions (Limited and preclinical): Papaya extracts contain compounds with antioxidant and anti-inflammatory potential, but direct clinical evidence for metabolic or other conditions is currently insufficient.

Side Effects

  • Minor: Mild gastrointestinal symptoms have been reported in some short-term clinical studies.
  • Potential serious: Animal studies suggest possible hepatotoxicity and reproductive toxicity with long-term use, though human data are lacking.

Drug Interactions

Possible interactions have been reported mainly with oral hypoglycemic agents (e.g., metformin, glimepiride), p-glycoprotein substrates (e.g., digoxin), and antibiotics with cation-chelating properties (e.g., ciprofloxacin). Clinical evidence is limited, and further research is needed to clarify these interactions. (Lim et al., 2021)

Who Should Avoid It?

  • Pregnant women: Potential reproductive toxicity and lack of safety data recommend avoiding papaya leaf consumption.
  • Individuals with liver impairment: Caution is advised due to possible hepatotoxicity observed in animal studies.
  • Breastfeeding women: Insufficient safety data exist; caution or avoidance is prudent.

Evidence Limitations

  • Many clinical studies are limited by small sample sizes and short durations.
  • Variability in formulations, dosages, and outcome measures hinders firm conclusions.
  • Scarce high-quality randomized controlled trials exist for many indications.
  • Long-term safety and herb-drug interaction data in humans are limited.
  • Most evidence for anti-parasitic and other uses is preclinical or ethnobotanical without clinical validation.

References

Last Reviewed

June 2024

Disclaimer: This information is for educational purposes only and is not intended as medical advice. Please consult a healthcare professional before using papaya or any herbal products, especially if you are pregnant, nursing, have pre-existing health conditions, or are taking medications.