Last verified: 17 days ago
Papaya Leaf
Also known as: Carica papaya leaf, CPLE, papaya leaf extract, PLE
Evidence under review. — Not yet rated
Tropical plant extract best supported for boosting platelet counts in dengue fever and chemotherapy patients.
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What it does
Papaya leaf extract comes from the leaves of the Carica papaya tree and has been used in traditional medicine across Asia. The strongest clinical evidence supports its ability to raise platelet...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
500 mg daily (dengue context); No established dose for other uses
What the Science Says
Papaya leaf extract comes from the leaves of the Carica papaya tree and has been used in traditional medicine across Asia. The strongest clinical evidence supports its ability to raise platelet counts faster than placebo in patients with dengue fever and in cancer patients experiencing chemotherapy-induced low platelets. In dengue studies, meaningful platelet increases appeared by day 3 of use at 500 mg daily, and a Phase III trial in chemotherapy patients confirmed statistically significant platelet recovery.
What It Doesn't Do
Won't detox your body — a clinical trial found no benefit for body composition, gut symptoms, or blood markers in a detox blend containing papaya leaf. No proven benefit for weight loss. No solid human evidence for antiviral effects against dengue virus directly. Not a proven treatment for lead poisoning in humans. Antifertility effects seen only in rats — do not assume this applies to humans.
Evidence-Based Benefits
Raises platelet counts faster than placebo in dengue fever patients with thrombocytopenia.
Moderate EvidenceEffective at: 500 mg daily for 5 days
Supporting studies (click to view on PubMed):
Significantly improves platelet recovery in cancer patients with chemotherapy-induced low platelets.
Moderate EvidenceEffective at: No established dose from provided studies
Supporting studies (click to view on PubMed):
Reduces Streptococcus mutans in saliva as effectively as a standard children's mouthwash.
Weak EvidenceEffective at: No established dose from provided studies
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Unknown — no pharmacokinetic studies were provided in the available data
Red Flags to Watch For
- Antifertility effects observed in animal studies; women trying to conceive should avoid papaya leaf extract
- Most 'detox' products containing papaya leaf are multi-ingredient blends with no proven benefit — the detox claim is not supported by clinical evidence
- Evidence for platelet benefits is specific to dengue fever and chemotherapy contexts — do not generalize to healthy individuals
- Animal and in vitro data (lead poisoning, antiviral, fish immunity) should not be extrapolated to human health claims
- Oral hygiene studies used small pediatric samples and short durations — not sufficient to recommend as a dental product
Products Containing Papaya Leaf
See how Papaya Leaf is used in these analyzed products:
Frequently Asked Questions
What does Papaya Leaf do?
Tropical plant extract best supported for boosting platelet counts in dengue fever and chemotherapy patients.
What is the effective dose of Papaya Leaf?
500 mg daily (dengue context); No established dose for other uses
Is Papaya Leaf safe?
Antifertility effects observed in animal studies; women trying to conceive should avoid papaya leaf extract
What doesn't Papaya Leaf do?
Won't detox your body — a clinical trial found no benefit for body composition, gut symptoms, or blood markers in a detox blend containing papaya leaf.
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25