Last verified: 17 days ago
Parsley Leaf
Also known as: Petroselinum crispum, garden parsley, curly parsley
Evidence under review. — Not yet rated
Common culinary herb with antioxidant properties. Human evidence is very limited and mixed.
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What it does
Parsley leaf is a common culinary herb derived from Petroselinum crispum. Animal studies suggest it may have antioxidant properties and could help protect the liver from fat accumulation caused by...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
No established dose (insufficient research data)
What the Science Says
Parsley leaf is a common culinary herb derived from Petroselinum crispum. Animal studies suggest it may have antioxidant properties and could help protect the liver from fat accumulation caused by high-sugar diets. Some rat research also hints at blood sugar-lowering effects in diabetic pregnancy models, but no reliable human clinical data supports these uses.
What It Doesn't Do
Won't lower your blood pressure — the one human clinical trial found no useful antihypertensive effect. Not a proven diuretic for kidney or urinary tract conditions. Animal study results don't automatically translate to humans. No proven liver detox effect in people.
Evidence-Based Benefits
Reduced liver fat accumulation in rats fed a high-fructose diet.
Weak EvidenceEffective at: No established human dose
Supporting studies (click to view on PubMed):
Lowered blood sugar and reduced fetal abnormalities in diabetic pregnant rats.
Weak EvidenceEffective at: No established human dose
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Unknown — no human pharmacokinetic data provided in the available studies
Red Flags to Watch For
- The only human clinical trial found no blood pressure benefit and reported kidney-related adverse events causing early dropout in some patients
- Most positive findings come from rat studies, which frequently fail to replicate in humans
- Widely marketed as a diuretic and detox agent despite lack of human evidence supporting these claims
- High doses used in animal studies (2 g/kg body weight) would be impractical and potentially unsafe to translate directly to humans
Products Containing Parsley Leaf
See how Parsley Leaf is used in these analyzed products:
Frequently Asked Questions
What does Parsley Leaf do?
Common culinary herb with antioxidant properties. Human evidence is very limited and mixed.
What is the effective dose of Parsley Leaf?
No established dose (insufficient research data)
Is Parsley Leaf safe?
The only human clinical trial found no blood pressure benefit and reported kidney-related adverse events causing early dropout in some patients
What doesn't Parsley Leaf do?
Won't lower your blood pressure — the one human clinical trial found no useful antihypertensive effect.
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