Carrot (Daucus carota)

Creator: Superfoods Advisor Editors
Published: 2026-07-03T00:00:00.000Z

Daucus carota · also known as zanahoria, carotte, Carrots, Orange carrot

By Superfoods Advisor Editors·July 3, 2026

Carrots benefits explained: beta-carotene (93% DV vitamin A per 100 g), what studies show for eyes and heart, carrot nutrition facts, and safety notes.

Carrot (Daucus carota subsp. sativus) is a root vegetable in the Apiaceae family, a botanical relative of parsley, celery and fennel. Its main benefit is beta-carotene, which the body converts to vitamin A: 100 g raw supplies 835 µg of retinol activity equivalents, 93% of the daily value, for 41 kcal. Evidence beyond vitamin A status is preliminary.

Carrot is one of the most widely cultivated root vegetables on Earth, with origins traced to the region spanning western and Central Asia, where purple and yellow varieties were domesticated during the Early Middle Ages. Orange carrots, now the global standard, were probably selected in western Europe during the Renaissance (Coe et al., 2023) and became dominant in European and colonial agriculture.

In traditional medicine systems, including Ayurveda and Unani, carrot root and seed have been used for purported diuretic and carminative properties. Today, carrot occupies a central place in global cuisine and clinical nutrition research, primarily due to its exceptionally high concentration of carotenoid pigments, particularly beta-carotene, which serves as a principal dietary precursor to vitamin A.

Key takeaways

100 g of raw carrot provides about 41 kcal, 2.8 g of fiber, 4.7 g of sugars and 8,280 µg of beta-carotene (835 µg RAE, 93% DV for vitamin A).
Eating carrots with a little fat, roughly 3–5 g in a meal, and cooking or pureeing them both increase beta-carotene absorption.
In a 60-day trial, 100 g of grated carrot a day raised serum retinol in lactating women with low vitamin A intake; extra carrots are not shown to sharpen vision once status is adequate.
Cohort studies link carotenoid intake with lower heart disease risk, but beta-carotene supplements showed no benefit and raised lung cancer risk in smokers, a finding that does not apply to dietary carrot.
Very high intake can turn skin yellow-orange (carotenodermia), which is harmless; carrot allergy is usually tied to birch pollen.

Evidence at a glance

Evidence:ModerateEvidence:LimitedEye Health and Vitamin A Adequacy
Evidence:PreliminaryAntioxidant Activity and Cardiovascular Markers
Evidence:Lab & animal onlyGlycemic Regulation and Metabolic Health
Evidence:Lab & animal onlyGut Microbiota and Digestive Health

How we grade evidence

Active Compounds

Carrot’s nutritional significance derives from a dense array of bioactive constituents concentrated in the taproot:

Beta-carotene (provitamin A): The most abundant carotenoid in orange carrot, beta-carotene is a fat-soluble pigment that undergoes enzymatic cleavage in the intestinal mucosa to yield retinol (vitamin A). Bioavailability is markedly enhanced by concurrent ingestion of dietary fat; the amount of fat needed in a meal appears to be small, roughly 3–5 g, though longer-term dose-response data are lacking (Ribaya-Mercado, 2002). Cooking and mechanical processing (pureeing, juicing) also disrupt cell walls and increase bioaccessibility.
Alpha-carotene: Present in significant quantities alongside beta-carotene; also converted to vitamin A, though at roughly half the efficiency of beta-carotene (24 µg dietary alpha-carotene vs 12 µg beta-carotene per 1 µg retinol activity equivalent; Linus Pauling Institute).
Lutein and zeaxanthin: Xanthophyll carotenoids concentrated in yellow carrot varieties and present in smaller quantities in orange types; associated with macular pigment density.
Polyacetylenes (falcarinol, falcarindiol): Bioactive lipophilic compounds found mainly in the Apiaceae, Araliaceae (such as ginseng), and Asteraceae (Dawid et al., 2015); preliminary cell and animal studies suggest cytostatic activity, though human evidence remains limited.
Dietary fiber (pectin, cellulose): Carrot is a meaningful source of soluble pectin, a fermentable fiber that has been studied for effects on postprandial glucose and colonic fermentation.
Chlorogenic acid and other hydroxycinnamic acids: Phenolic antioxidants present in the phloem and skin; contribute to total antioxidant capacity.

Nutritional Profile

The following values represent raw, orange carrot per 100 g edible portion (USDA FoodData Central, SR Legacy 170393):

Nutrient	Amount	% DV
Energy	41 kcal	—
Carbohydrates	9.6 g	—
Dietary fiber	2.8 g	—
Sugars	4.7 g	—
Protein	0.9 g	—
Total fat	0.2 g	—
Vitamin A (as beta-carotene)	835 µg RAE	93%
Vitamin K1	13.2 µg	11%
Vitamin C	5.9 mg	7%
Potassium	320 mg	7%
Folate	19 µg DFE	5%
Beta-carotene	8,280 µg	—

Cooked carrot delivers slightly higher beta-carotene bioaccessibility per gram than raw, due to cell wall softening, though water-soluble vitamin C is partially degraded by heat.

Evidence for Purported Benefits

Eye Health and Vitamin A Adequacy

Evidence:Moderate For vitamin A status in people with low intake: carrot raised serum retinol in a feeding trial; no benefit is shown once status is adequate.

Evidence:Limited For age-related macular degeneration: lutein/zeaxanthin supplements did not slow progression in AREDS2’s primary analysis; carrot supplies less.

Vitamin A deficiency is the world’s leading preventable cause of childhood blindness (WHO). Dietary beta-carotene can help where preformed retinol is scarce: in a Zimbabwean trial in lactating women, 100 g of grated carrot daily for 60 days raised serum retinol (Ncube et al., 2001). The conversion of beta-carotene to retinol supports rhodopsin synthesis in rod photoreceptors, maintaining dim-light vision. A pooled analysis by Stevens et al. (2015) estimated that 29% of children aged 6–59 months in low- and middle-income countries were still vitamin A deficient in 2013, and a meta-analysis of randomized trials by Mayo-Wilson et al. (2011) found that vitamin A supplements reduced night blindness and xerophthalmia in children under 5. Those trials used synthetic preformed vitamin A rather than dietary beta-carotene. For individuals with adequate vitamin A status, there is no evidence that extra carrot intake further improves visual acuity.

Lutein and zeaxanthin from carrot may contribute modestly to macular pigment optical density; the Age-Related Eye Disease Study 2 (AREDS2, 2013) found no significant reduction in AMD progression from supplemental lutein/zeaxanthin in its primary analysis, with only exploratory signals in people with low dietary intake, though dietary amounts from carrot alone are lower than studied supplement doses.

Antioxidant Activity and Cardiovascular Markers

Evidence:Preliminary Cohorts link carotenoid intake to lower heart disease; beta-carotene supplement trials showed no benefit, and whole carrot is untested.

A meta-analysis of prospective studies by Aune et al. (2018) found that higher dietary intake and blood concentrations of carotenoids, including beta-carotene, were inversely associated with coronary heart disease, stroke, and overall cardiovascular disease. However, randomized controlled trials using isolated beta-carotene supplements (ATBC, 1994; CARET, Omenn et al., 1996) showed no cardiovascular benefit and, in smokers, an increased risk of lung cancer at pharmacological doses — a finding that does not generalize to whole-food carrot consumption at typical dietary amounts.

Glycemic Regulation and Metabolic Health

Evidence:Lab & animal only Rests on pectin’s proposed mechanism; no controlled human trials of carrot are available.

Carrot’s soluble pectin content may attenuate postprandial glucose excursions by slowing gastric emptying and reducing the rate of monosaccharide absorption. Cooking softens the food matrix and may raise carrot’s glycemic response, but controlled human trials comparing raw and cooked carrot are lacking. Because a typical serving contains little carbohydrate, its glycemic load is low either way.

Gut Microbiota and Digestive Health

Evidence:Lab & animal only In vitro and animal work suggests prebiotic effects; human trials of carrot are scarce.

Carrot-derived pectin and insoluble fiber serve as substrates for colonic fermentation, which yields short-chain fatty acids (SCFAs). In vitro and animal studies suggest possible prebiotic effects, but well-controlled human intervention trials specifically examining carrot consumption on microbiota composition remain scarce.

Typical Use and Preparation

A bunch of carrots with their green tops Photo: Evan-Amos, public domain, via Wikimedia Commons

Carrot is consumed raw, steamed, roasted, boiled, and pureed across virtually all culinary traditions. Key preparation considerations:

Fat co-ingestion: To maximize beta-carotene absorption, carrot is best consumed with a source of dietary fat (olive oil, nuts, avocado). In a small study of 7 adults, Brown et al. (2004) found essentially no carotenoid absorption from a salad eaten with fat-free dressing.
Light cooking: Steaming or roasting at moderate temperatures softens cell walls and increases bioaccessibility of carotenoids relative to raw consumption, while preserving most heat-stable nutrients.
Juicing: Carrot juice concentrates beta-carotene and sugars; the fiber matrix is largely removed, which may allow faster sugar absorption than whole carrot.
Whole vs. baby carrot: Baby-cut carrots are pieces cut and shaped from full-size carrots; their nutrient profile is broadly similar to whole carrots.

Typical culinary servings range from about 61 g (one medium carrot) to 128 g (1 cup chopped), per USDA FoodData Central.

Beta-carotene from carrots also accumulates in skin, a topic covered in the skin-health nutrition guide.

Safety, Interactions, and Contraindications

Carrot is well tolerated by most people at typical dietary quantities. Specific considerations include:

Carotenodermia: Sustained high intake of carotenoid-rich foods or supplements — reported at more than about 30 mg beta-carotene per day over months (Priyadarshani, 2018), roughly 360 g of raw carrot or regular carrot juice — can lead to carotenodermia, a harmless yellowing of the skin (particularly palms, soles, and nasolabial folds) caused by excess circulating beta-carotene. The condition resolves upon reducing intake and should be distinguished from jaundice, which involves yellowing of the sclera.

Beta-carotene supplementation risk (smokers): High-dose beta-carotene supplements are not advised for current smokers, because they increased lung cancer incidence in the ATBC and CARET trials. This risk does not apply to dietary carrot consumption at normal culinary amounts.

Carrot allergy: Carrot allergy is commonly linked to birch pollen sensitization. The major allergen, Dau c 1, is related to the birch pollen allergen Bet v 1; in a double-blind food-challenge study, all confirmed carrot-allergic patients had IgE only to birch-pollen-related carrot allergens (Ballmer-Weber et al., 2001). Symptoms are typically oral allergy syndrome (itching or mild swelling of the mouth) after raw carrot. Dau c 1 is considered heat-labile, but cooked carrot extract still provoked allergic mediator release in laboratory tests, so cooking may not prevent reactions (Jacob et al., 2020).

Vitamin K and anticoagulants: Carrot contains small amounts of vitamin K1 (about 13 µg per 100 g raw); individuals on warfarin (coumadin) should maintain consistent vegetable intake rather than making abrupt dietary changes, as variable vitamin K intake can affect INR stability.

This entry is for informational purposes only. Carrot is a food, not a medicine, and is not intended to diagnose, treat, prevent, or cure any disease or health condition. Consult a qualified healthcare provider for medical guidance.

Frequently Asked Questions

Are carrots good for your eyes?

Carrots support vision mainly by supplying vitamin A, which the retina needs to make rhodopsin for dim-light vision. Where intake is low, they can improve vitamin A status: 100 g of grated carrot daily raised serum retinol in a 60-day trial (Ncube et al., 2001). For people whose vitamin A status is already adequate, there is no evidence that eating more carrots further improves eyesight.

What are carrots good for?

Carrots are among the richest common sources of beta-carotene, so their clearest role is helping meet vitamin A needs. They also provide fiber, potassium and vitamin K1 for 41 kcal per 100 g raw. Observational studies associate diets high in carotenoids with lower cardiovascular risk, but that evidence is preliminary and has not been shown for carrots specifically.

Do carrots have fiber?

Yes. Raw carrot contains about 2.8 g of dietary fiber per 100 g, so one medium carrot (about 61 g) supplies roughly 1.7 g (USDA FoodData Central). Part of it is soluble pectin, which colon bacteria ferment into short-chain fatty acids. Juicing removes most of the fiber, which may let the sugars in carrot juice be absorbed faster than from whole carrots.

Are carrots high in potassium?

Carrots are a moderate rather than high source. 100 g raw provides about 320 mg of potassium, roughly 7% of the daily value, which is similar to many other root vegetables. People on potassium-restricted diets for kidney disease should follow the portion advice of their care team rather than general guidance.

Can eating too many carrots turn your skin orange?

Yes. Sustained intake of more than about 30 mg of beta-carotene a day over months, roughly 360 g of raw carrot daily or regular carrot juice, can cause carotenodermia, a harmless yellow-orange tint most visible on the palms and soles (Priyadarshani, 2018). It fades when intake drops. Unlike jaundice, it does not yellow the whites of the eyes.

References

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