Evidence-based·Last reviewed May 31, 2026·How we grade evidence

Chicoric acid

PhytochemicalPolyphenolBest with a meal

Chicoric acid is a hydroxycinnamic acid found primarily in Echinacea purpurea, chicory, and dandelion. Most of its 'reputation' is borrowed from echinacea's mixed immune evidence and from preclinical antioxidant / anti-HIV mechanisms. There are essentially no clinical trials of isolated chicoric acid in humans.

Quick decision guide

May help most

There is no condition with quality human evidence for isolated chicoric acid. Whole-plant Echinacea purpurea standardized to chicoric acid has mixed evidence for cold prevention/duration; that's a different product.

Common dosing range

Not established as an isolated supplement. Echinacea purpurea extracts standardized to 2–5% chicoric acid are dosed at 300–900 mg/day of dried plant equivalent.

When to expect effects

Echinacea trials for cold typically measure within-cold duration changes; isolated chicoric acid trials don't exist.

Watch out for

Allergic reactions to Asteraceae family (ragweed, chrysanthemum, daisies) are the main concern in Echinacea-based products. Theoretical autoimmune-flare risk; avoid in autoimmune disease without specialist guidance.

Evidence snapshot

Cold prevention/duration (via Echinacea)Mixed evidence
Antioxidant biomarker (isolated)Preclinical
Anti-HIV (in vitro)Preclinical only
Direct human supplementation dataEssentially none

What is it

Chicoric acid (also cichoric acid) is a dicaffeoyltartaric acid polyphenol found in echinacea, chicory, and dandelion; it is often used to standardize echinacea supplements.

Is it worth it for you?

Use this as a quick fit check, not a diagnosis.

Worth considering if…

You're taking a standardized Echinacea purpurea product (where chicoric acid is one of several bioactives) and accept the mixed evidence for cold prevention/duration
You eat chicory greens and dandelion leaves as part of a varied diet — you'll get chicoric acid naturally with no risk
You're a botanical researcher interested in the molecule for its own preclinical pharmacology

Probably skip if…

You're hoping for evidence-based immune support from isolated chicoric acid — no human supplementation trials exist
You have an autoimmune disease (lupus, RA, MS) — theoretical immune-stimulating effects of Echinacea are typically advised against
You're allergic to ragweed or other Asteraceae plants — risk of allergic reaction with Echinacea-derived products
You're taking immunosuppressants (corticosteroids, biologics, transplant medications) — theoretical antagonism
You expect specific antiviral or anti-HIV benefit — preclinical only, never translated to humans
You're pregnant or breastfeeding — limited safety data for concentrated Echinacea / chicoric acid

Evidence at a glance

Cold prevention / duration (via standardized Echinacea purpurea)

Limited Evidence
Effect
Small benefits in some E. purpurea trials; overall pooled effect inconsistent
Best fit
Adults trying a standardized E. purpurea product for early cold treatment, with realistic expectations
Time
Days within a cold episode in treatment trials; not established for prevention

Antioxidant / cellular biomarker effects

Mixed Evidence
Effect
Antioxidant activity in vitro and in rodent models; no documented human-outcome benefit
Best fit
None on current evidence
Time
Not established

Antiviral / anti-HIV (preclinical)

Mixed Evidence
Effect
Sub-micromolar IC50 against HIV-1 integrase in vitro; no human clinical use
Best fit
None — historical research finding, not a current therapeutic application
Time
Not applicable to human use

Glycemic / anti-inflammatory effects (preclinical)

Mixed Evidence
Effect
Preclinical glycemic and anti-inflammatory effects; no human evidence
Best fit
None on current evidence
Time
Not established

Evidence for 4 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Cold prevention / duration (via standardized Echinacea purpurea)

Supplement benefit
Limited Evidence

The Cochrane 2014 review of Echinacea found mixed evidence: some E. purpurea preparations had small benefits for prevention or duration of the common cold; others showed no effect. Trial heterogeneity is huge — different species (E. purpurea, E. angustifolia, E. pallida), different plant parts (root vs aerial parts), and different chicoric-acid concentrations. Pinning a result specifically on the chicoric acid content vs the alkylamides, polysaccharides, or other constituents is not possible from current evidence.

Effect size
Small benefits in some E. purpurea trials; overall pooled effect inconsistent
Time to effect
Days within a cold episode in treatment trials; not established for prevention
Best fit
Adults trying a standardized E. purpurea product for early cold treatment, with realistic expectations
Less likely
Anyone expecting a reliable cold-prevention or cold-shortening effect; people with autoimmune disease

Bottom line: If you try Echinacea for a cold, evidence is mixed and you can't attribute any effect specifically to chicoric acid.

Evidence is mixed

Cochrane 2014 found mixed effects across Echinacea products. Differences in species, plant part, extraction method, and standardization (including chicoric acid content) make pooled estimates difficult.

SourceKarsch-Völk et al., 2014 — Cochrane Database of Systematic Reviews· conflicting
SourceKarsch-Völk et al., 2014 — Cochrane Database of Systematic ReviewsBirt et al., 2008 — PubMed — Pharmaceutical Biology

Antioxidant / cellular biomarker effects

Mechanism only
Mixed Evidence

Chicoric acid has demonstrated antioxidant activity in cell culture and animal models — scavenging free radicals, modulating NF-κB, reducing oxidative damage markers. No human trial has tested isolated chicoric acid for any clinical antioxidant outcome. The 'antioxidant supplement' framing rests on mechanistic plausibility, not on demonstrated human benefit.

Effect size
Antioxidant activity in vitro and in rodent models; no documented human-outcome benefit
Time to effect
Not established
Best fit
None on current evidence
Less likely
Anyone hoping for measurable health outcomes from isolated chicoric acid

Bottom line: Real preclinical antioxidant pharmacology; zero human-outcome evidence.

SourceLee & Scagel, 2013 — PMC — Food ChemistryBirt et al., 2008 — PubMed — Pharmaceutical Biology

Antiviral / anti-HIV (preclinical)

Mechanism only
Mixed Evidence

Robinson 1996 in PNAS identified dicaffeoyltartaric acid derivatives including chicoric acid as potent HIV-1 integrase inhibitors in vitro. The finding was historically influential for the integrase-inhibitor drug class but did not translate to clinically useful antiretroviral therapy — pharmacokinetics, selectivity, and cellular delivery limitations were prohibitive. No human antiretroviral trial of chicoric acid has been conducted.

Effect size
Sub-micromolar IC50 against HIV-1 integrase in vitro; no human clinical use
Time to effect
Not applicable to human use
Best fit
None — historical research finding, not a current therapeutic application
Less likely
Patients with HIV — use established antiretroviral therapy

Bottom line: Historically interesting in vitro finding; not a human antiviral therapy.

SourceRobinson et al., 1996 — Proceedings of the National Academy of SciencesLee & Scagel, 2013 — PMC — Food Chemistry

Glycemic / anti-inflammatory effects (preclinical)

Mechanism only
Mixed Evidence

Animal and cell studies report chicoric acid effects on glucose metabolism (increased GLUT4 translocation, improved insulin sensitivity in mouse models) and inflammation markers (reduced NF-κB activation, lower cytokine output). No human RCT in any metabolic or inflammatory indication.

Effect size
Preclinical glycemic and anti-inflammatory effects; no human evidence
Time to effect
Not established
Best fit
None on current evidence
Less likely
Patients with diabetes or inflammatory disease seeking evidence-based therapy

Bottom line: Preclinical signals only. Don't substitute for evidence-based diabetes or anti-inflammatory care.

SourceLee & Scagel, 2013 — PMC — Food Chemistry

How it works

Chicoric acid has antioxidant and anti-inflammatory activity in lab models, including inhibition of hyaluronidase and modest immunostimulant effects in vitro. It is one marker compound used to verify the identity and quality of echinacea products. Human clinical effects attributable specifically to chicoric acid versus the broader echinacea matrix have not been clearly separated.

How to take it

1. Typical dose
• Isolated chicoric acid is essentially not sold; there's no clinically validated dose • Echinacea purpurea extracts standardized to 2–5% chicoric acid: 300–900 mg/day dried plant equivalent in 2–3 doses • Whole-food chicory / dandelion: any reasonable culinary amount
2. Higher studied dose
Some Echinacea trials have used up to 1,500 mg/day dried plant equivalent for short courses. Isolated chicoric acid has no dose-response human data.
3. Timing
If using Echinacea for an active cold, start at first symptom and continue for 5–10 days. For prevention courses, daily dosing in cold season.
4. With food
Either; food may reduce mild GI upset that occasionally occurs with concentrated Echinacea preparations.
5. Split dosing
2–3 daily doses for Echinacea preparations.
6. How long to try
5–10 days for cold treatment; intermittent courses (e.g., 1 week on, 1 week off) for prevention. Long-term continuous use of concentrated Echinacea is not recommended; reasonable food-source intake of chicory and dandelion is fine indefinitely.

What to track

Symptom duration / severity if treating a cold
Allergic reactions (rash, GI upset, respiratory symptoms) — especially if Asteraceae-sensitive
If on immunomodulating medications: discuss with prescriber

Bottom line: No standalone chicoric acid product is worth taking for any specific outcome. Whole-plant Echinacea purpurea has its own (mixed) evidence; that's the practical context for any chicoric-acid use.

3 commercial forms

Compare the main delivery options and what they’re best suited for.

Echinacea purpurea standardized extract

Practical source

Whole-plant E. purpurea standardized to chicoric acid content (typically 2–5%) plus other actives. The actual format consumers encounter for chicoric-acid use. Evidence base is the mixed Echinacea cold-trial literature.

Whole-plant matrix delivers chicoric acid alongside alkylamides and polysaccharides; attributing effects to chicoric acid specifically isn't possible.

Isolated chicoric acid (research / niche)

Limited availability

Purified chicoric acid is sold mainly as a research reagent; consumer supplement availability is limited and clinical use case is undefined.

Limited human pharmacokinetic data; oral bioavailability not well characterized.

Whole chicory / dandelion (food)

Dietary source

Chicory root, chicory greens, and dandelion leaf are natural dietary sources of chicoric acid, eaten raw or cooked. Quantity per serving is modest; this is a normal dietary exposure, not a clinical intervention.

Bioactive doses far below those used in even the limited preclinical studies.

Safety

Know the common side effects, key cautions, and who should avoid it.

Common side effects

mild GI upsetoccasional rash in sensitive users

Serious risks

Who should avoid it

Pregnancy & breastfeeding

Dietary intake from chicory and dandelion greens is safe in pregnancy. Concentrated Echinacea products (the typical chicoric-acid source) have limited pregnancy safety data; use is generally avoided unless cleared by your prescriber.

SourceLee & Scagel, 2013 — PMC — Food Chemistry

Bottom line: Generally safe in food amounts. The risks attach to concentrated Echinacea products: allergic reactions and theoretical autoimmune concerns.

Interactions

immunosuppressants (corticosteroids, cyclosporine, tacrolimus, biologics)Moderate

Echinacea's immune-stimulating activity could theoretically antagonize immunosuppressive therapy. Limited clinical data; avoid in transplant or autoimmune-disease patients on these medications.

SourceKarsch-Völk et al., 2014 — Cochrane Database of Systematic Reviews
CYP3A4 substrate drugsMinor

Some Echinacea constituents have shown mild CYP3A4 modulation in vitro; clinical relevance is small. Worth flagging if combined with narrow-therapeutic-index CYP3A4 substrates.

SourceBirt et al., 2008 — PubMed — Pharmaceutical Biology

Food sources

Chicory root (Cichorium intybus)

Amount
Concentrated source; varies by preparation
%DV
—

Chicory greens / curly endive

Amount
1 cup chopped (~0.5–1.5% chicoric acid by dry weight)
%DV
—

Dandelion leaf (Taraxacum officinale)

Amount
1 cup chopped (variable chicoric acid content)
%DV
—

Echinacea purpurea aerial parts

Amount
Highest natural source (2–5% in standardized extracts)
%DV
—

Basil (Ocimum basilicum)

Amount
Trace amounts in fresh herb
%DV
—

Choosing a product

What to look for on the label — and what to be skeptical of.

Look for…

Standardized Echinacea purpurea extract with chicoric acid content disclosed (typically 2–5%) — better than unspecified 'echinacea blend'
Plant part stated (aerial parts have more chicoric acid; root has more alkylamides)
Third-party tested for identity (the correct Echinacea species) and contaminants
Single-species product (E. purpurea specifically if matching the chicoric acid story) — combination 'echinacea blends' confuse what's actually delivered
Liquid extracts and capsules both work; consistency of dosing matters more than format

Be skeptical of…

Standalone 'chicoric acid' supplement claims — there's essentially no human data to support any specific use
Anti-HIV / antiviral claims — preclinical only
Cancer prevention or treatment claims — no human-outcome trials
Definitive 'cold cure' or 'immune booster' claims — Cochrane evidence is mixed
Combination 'super immune' formulas hiding chicoric acid behind a proprietary blend
Premium pricing on isolated chicoric acid — molecule has no rigorous human supplementation evidence to justify it

Frequently asked questions

Why does my echinacea say chicoric acid?⌄

It's a standardization marker used to confirm the product contains an adequate amount of E. purpurea phenolics.

References by claim

Antioxidant / cellular biomarker effects

Lee & Scagel, 2013 — PMC — Food Chemistry (2013) link

Birt et al., 2008 — PubMed — Pharmaceutical Biology (2008) link

Cold prevention / duration (via standardized Echinacea purpurea)

Karsch-Völk et al., 2014 — Cochrane Database of Systematic Reviews (2014) link

Antiviral / anti-HIV (preclinical)

Robinson et al., 1996 — Proceedings of the National Academy of Sciences (1996) link

Other references

Chicoric Acid (PubChem CID 5281764) — PubChem (2024) link

Pellati et al., 2004 — PubMed — Phytochemical Analysis (2004) link

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Evidence-based·Last reviewed May 31, 2026·Evidence current as of May 31, 2026·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.