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Anti-InflammatoryCognitiveLongevity

Luteolin

Evidence Level
Limited
2 Clinical Trials
5 Documented Benefits
2/5 Evidence Score

Luteolin is a flavone found in parsley, celery, broccoli, artichoke, peppers, and various herbs. Studied for anti-inflammatory effects, mast cell stabilization (allergy/inflammation), neuroprotection, and as a senolytic. Particularly notable for mast cell modulation — used in mast cell activation syndrome (MCAS) protocols. Active in atherosclerosis, autoimmunity, and cognitive decline research. One of the senolytic flavonoids identified by Mayo Clinic screening.

Studied Dose 100-300 mg/day general use; mast cell protocols often use luteolin 100-200 mg with quercetin and other flavonoids
Active Compound Luteolin (3',4',5,7-tetrahydroxyflavone)

Benefits

Mast Cell Stabilization

Luteolin is a potent inhibitor of mast cell degranulation — mast cells release histamine, tryptase, and inflammatory mediators in allergies and mast cell activation syndrome (MCAS). Theoharides 2015 and others establish luteolin as foundational MCAS supplement. Often combined with quercetin.

Supported by Trial 2

Neuroinflammation Reduction

Microglial activation drives neuroinflammation in Alzheimer's, autism, and chronic neurological conditions. Luteolin reduces microglial activation and pro-inflammatory cytokines in animal models. Theoretical autism spectrum applications.

Supported by Trial 1, Trial 2

Cancer Chemoprevention Research

Extensive in vitro evidence: induces apoptosis, inhibits angiogenesis, reduces metastasis in cancer cell lines. Animal models show tumor growth reduction. Human clinical translation limited.

Supported by Trial 2, Trial 1

Cardiovascular Anti-Atherosclerotic Effects

Reduces LDL oxidation, vascular inflammation, and adhesion molecule expression — anti-atherosclerotic mechanisms. Modest cholesterol effects. Mostly mechanistic and animal evidence.

Supported by Trial 2

Senolytic Activity (Adjunctive)

Identified along with fisetin in Mayo Clinic flavonoid screening as having senolytic activity, though less potent than fisetin. Component of multi-flavonoid longevity stacks.

Supported by Trial 1

Mechanism of action

1

Mast Cell Stabilization

Luteolin inhibits mast cell degranulation by stabilizing mast cell membranes and inhibiting calcium-dependent degranulation pathways. Reduces histamine, tryptase, and cytokine release. Foundational mechanism for allergy/MCAS application.

2

NF-κB Pathway Inhibition

Inhibits NF-κB activation — reducing pro-inflammatory gene expression (TNF-alpha, IL-6, IL-1β, COX-2, iNOS). Broad anti-inflammatory profile.

3

Microglial Modulation (Brain)

Reduces activated microglia (the brain's immune cells) — relevant for neuroinflammation in chronic neurological conditions. Crosses blood-brain barrier.

4

Histamine N-Methyltransferase Effects

Modest inhibition of histamine breakdown enzymes balanced against mast cell stabilization — net effect depends on context. Generally anti-allergic clinically.

Clinical trials

1
Luteolin for Autism Spectrum Disorders — Theoharides 2012
PubMed

Open-label trial of luteolin formulation (with quercetin and rutin in liposomal form) in children with ASD over 26 weeks.

37 children with ASD.

Open-label improvements in adaptive behaviors, communication, social interaction, and GI symptoms. CRITICAL CAVEAT: open-label, no placebo control; subsequent placebo-controlled trials less robust. Theoretical mechanism (neuroinflammation reduction) has gained interest.

2
Luteolin for Mast Cell Activation — Theoharides Series
PubMed

Multiple papers and case series by Theoharides et al. on luteolin as mast cell stabilizer for MCAS, chronic urticaria, related conditions.

MCAS patients, chronic urticaria patients.

Modest symptom improvements in mast cell-related conditions. Open-label/observational primarily; rigorous RCTs limited. Foundational supplement in functional medicine MCAS protocols.

Side effects and drug interactions

Common Potential side effects

Generally well-tolerated.
GI distress at high doses.
Headache rare.
Theoretical bleeding risk at very high doses (flavonoid platelet effects).
Liposomal forms may cause loose stools.
Allergic reactions to plant source material possible.
Possible thyroid effects at very high doses (theoretical; some flavonoids inhibit thyroid peroxidase).

Important Drug interactions

Anticoagulants — theoretical bleeding risk at high doses.
Antihistamines — additive antihistaminic / mast cell effects (typically beneficial in MCAS).
Mast cell stabilizers (cromolyn) — additive; typically used together in MCAS protocols.
Hormone-sensitive conditions — theoretical aromatase effects (modest at supplemental doses).
Chemotherapy — theoretical interactions; consult oncologist.
CYP-metabolized drugs — luteolin modulates CYP enzymes in vitro; theoretical interactions.

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Frequently asked questions about Luteolin

What is Luteolin?

Luteolin is a flavone found in parsley, celery, broccoli, artichoke, peppers, and various herbs.

What does Luteolin do?

Luteolin inhibits mast cell degranulation by stabilizing mast cell membranes and inhibiting calcium-dependent degranulation pathways. Reduces histamine, tryptase, and cytokine release. Foundational mechanism for allergy/MCAS application. In clinical research, Luteolin has been studied for mast cell stabilization, neuroinflammation reduction, cancer chemoprevention research.

Who should take Luteolin?

Luteolin may be most relevant for people interested in anti-inflammatory, cognitive, longevity. It has been clinically studied for mast cell stabilization, neuroinflammation reduction, cancer chemoprevention research. As with any supplement, consult your healthcare provider before starting, especially if you have medical conditions or take prescription medications.

How long does Luteolin take to work?

Most clinical trial effects appear over weeks of consistent use; individual response varies. Acute or same-day effects (where applicable) typically appear within hours, but most cumulative benefits — particularly those affecting biomarkers, mood, sleep quality, or chronic symptoms — require 4-12 weeks of regular use to fully assess. If you don't notice benefit after 12 weeks at the appropriate dose, it may not be your responder.

When is the best time to take Luteolin?

For anti-inflammatory and joint goals, Luteolin is typically taken with meals — fat-containing food often improves absorption for fat-soluble compounds. Daily consistency matters more than precise timing for cumulative anti-inflammatory effects. Always check product labeling and follow personalized guidance from your healthcare provider.

Is Luteolin worth taking?

Luteolin has limited clinical evidence (Evidence Level 2/5 on NutraSmarts) — preliminary research suggests potential benefit, but more rigorous trials are needed. Whether it's worth taking depends on your specific goals, what you've already tried, your budget, and your overall supplement strategy. The honest framing: no supplement is essential for most people, and lifestyle factors (sleep, exercise, diet, stress management) typically produce larger effects than any single supplement. Luteolin is most worth trying if its evidence-supported uses align with your specific goals.

What is the recommended dosage of Luteolin?

The clinically studied dose for Luteolin is 100-300 mg/day general use; mast cell protocols often use luteolin 100-200 mg with quercetin and other flavonoids. Always follow product labeling and consult a healthcare provider for personalized dosing recommendations.

What is Luteolin used for?

Luteolin is studied for mast cell stabilization, neuroinflammation reduction, cancer chemoprevention research. Luteolin is a potent inhibitor of mast cell degranulation — mast cells release histamine, tryptase, and inflammatory mediators in allergies and mast cell activation syndrome (MCAS).