Purple Carrot Powder
EVIDENCE: WEAKAlso sold as: Daucus carota ssp. sativus var. atrorubens, black carrot, purple carrot extract, anthocyanin carrot
Purple carrot powder contains anthocyanins and phenolic acids with laboratory antioxidant activity. Human evidence is limited: one small trial found no significant metabolic effect. Oral and dental benefits have not been studied.
Compiled by iSupplementReviews editorial team ·Updated 2026-10-06 · 4 sources
- Type
- Botanical/food powder — anthocyanin source
- Studied dose
- 118.5 mg anthocyanins + 259 mg phenolic acids/day (QUENCH trial, 4 weeks, null); 700 mg cyanidin-3-glucoside/day via whole root (12 weeks, small positive)
- Best form
- Whole-root powder or extract standardized for anthocyanin content — acylated anthocyanin forms survive processing and digestion better
- Our rating
- WEAK — Mostly small, animal, or traditional evidence
What is purple carrot powder?
Purple carrot powder is dried root from a purple or black variety of Daucus carota. It contains anthocyanins, also found in blueberries and black rice, plus phenolic acids. These compounds have laboratory activity, but human health outcomes need separate evidence.
Other names and forms it’s sold as
- Purple/black carrot powder: whole dried root, the common supplement form
- Purple carrot extract: concentrated anthocyanin preparations, also used as natural food coloring
- Anthocyanin-standardized material: rare; most powders don’t state an anthocyanin percentage, which makes dose impossible to compute
Where does it come from?
The taproot of the purple carrot cultivar, the original carrot color before Dutch breeding popularized orange. Commercial powder is simply dehydrated, milled root or an extract of it.
How does it work in the body?
The proposed mechanisms come from the anthocyanin and phenolic fraction: scavenging reactive oxygen species and dampening inflammatory signaling, demonstrated in immune-cell and blood-vessel-cell models and in digestion simulations on colon cells. These are cell-level mechanisms; whether they translate to clinical effects at supplement doses is the open question.
What is it claimed to do?
Antioxidant support, anti-inflammatory effects, cardiovascular/metabolic support, “nutrient-rich” general wellness, and, on supplement labels that need a fifth bullet, vaguely oral or systemic “support.” The first set has plausible preclinical backing; anything condition-specific is extrapolation.
What does the research show?
| Claim | Evidence | Dose studied | Verdict |
|---|---|---|---|
| Antioxidant activity | Lab digestion + colon-cell models | extract-level | Mechanism plausible — cell data only |
| Metabolic/lipid/blood-pressure effects | QUENCH trial (n=16, 4 wk) — no significant change; one smaller 12-wk study positive at food-scale intake | 118.5 mg anthocyanins/day (no benefit found); ~700 mg cyanidin-3-glucoside/day (positive) | Mixed at best — small trials, short durations |
| Oral/dental health | None — no human or animal oral-health trials identified | n/a | Unstudied for this purpose |
| Anthocyanin absorption | Human feeding trial — forms detected in plasma/urine | 250 g whole root | Supported — bioavailability real but modest |
The findings on the human record
The single controlled human trial (QUENCH, n=16 overweight men, 4 weeks at supplement-realistic doses) found no significant effects on weight, lipids, blood pressure, or inflammation markers. The positive counterpoint is a smaller food-scale study (purple root delivering ~700 mg cyanidin-3-glucoside daily for 12 weeks) reporting triglyceride and blood-pressure improvements. The fair summary: real phytonutrients, unproven clinical benefit at pill doses, and zero dental-specific research.
What dose was studied?
| Goal | Dose | Form/route | Duration |
|---|---|---|---|
| Metabolic markers (QUENCH) | 118.5 mg anthocyanins + 259 mg phenolic acids/day | dried purple carrot | 4 weeks — null |
| Triglycerides/BP | ~700 mg cyanidin-3-glucoside/day | ~200 g whole root | 12 weeks — small positive |
| Bioavailability | 250 g raw/cooked root | whole food | single feeding |
Side effects
Food-grade safety; it’s a vegetable. The QUENCH trial measured liver enzymes explicitly and found no change; adverse effects at culinary or supplement-level intakes aren’t documented.
Drug interactions
None documented for purple carrot specifically. (Anthocyanin-class supplements in general carry no well-established drug-interaction list.)
Who should not take it?
No identified risk group; it is, after all, a food. Carrot allergy exists but is uncommon.
What the authorities say
No monographs, no approved claims, no warnings. Purple carrot is regulated as food; anthocyanin extracts of it double as approved natural colorants (E163). Nothing institutional addresses it as a therapeutic.
What to know about purple carrot powder
Purple-carrot compounds are absorbed, but the small cited human trial found no significant metabolic benefit. No oral-health trial was identified. Color and antioxidant chemistry do not establish a clinical supplement benefit.
Frequently asked questions about Purple Carrot Powder
What does purple carrot powder do in a supplement?
It contributes anthocyanins (the purple pigments) and phenolic acids, compounds with antioxidant and anti-inflammatory effects demonstrated mostly in cell and animal work. In practice it usually functions as a 'phytonutrient halo' ingredient: real compounds, plausible general-wellness rationale, no condition-specific human trials.
Is purple carrot the same as regular carrot?
Same species (Daucus carota), different pigment chemistry. Orange carrots get color from carotenoids like beta-carotene; purple/black carrots carry anthocyanins, the flavonoid family also found in blueberries and black rice, plus their own phenolic acids. Nutritionally they overlap; the anthocyanin profile is the distinct part.
Has purple carrot been studied in humans?
Barely. The main trial is the QUENCH study: 16 overweight men took 118.5 mg anthocyanins + 259 mg phenolic acids daily for 4 weeks with no significant change in weight, lipids, blood pressure, or inflammation markers (HDL dipped; the trial was small and short). A separate smaller study reported lower triglycerides and blood pressure after ~700 mg cyanidin-3-glucoside/day for 12 weeks. That's the whole human record.
Does purple carrot help oral or dental health?
There are no human trials of purple carrot for dental outcomes; no plaque, gum, breath, or enamel studies exist. Any oral-health claim attached to it is extrapolation from generic antioxidant mechanisms, not tested evidence.
Are anthocyanins absorbed?
Yes, partially. A feeding trial detected four of five purple-carrot anthocyanin forms in plasma and urine after a 250 g serving, with acylated forms showing better stability through digestion. Bioavailability is real but modest, which is why gram-level whole-food servings dominate the literature rather than milligram supplements.
References
- [1]QUENCH RCT — dried purple carrot (118.5 mg anthocyanins/day, 4 wk) vs placebo in overweight adults: no significant effects (Can J Physiol Pharmacol 2013)
- [2]Anthocyanin kinetics are dependent on anthocyanin structure — human feeding trial (Br J Nutr 2011)
- [3]Nutraceutical benefits of purple carrot against metabolic syndrome and cancer — review (Applied Sciences 2022)
- [4]Antioxidant effects of GI-digested purple carrot extract on human colonic mucosa cells — in vitro (Food Chem Toxicol 2015)
Products we reviewed containing Purple Carrot Powder
Based on recorded labels or seller-described formulas. Inclusion does not establish a match to the strains, preparations or amounts studied here; check each review's disclosure limits.