What Vitamins Are in Eggplant? Nutrition Facts

Eggplant is not a vitamin powerhouse in the way that citrus fruits or leafy greens are. A typical serving provides small amounts of several B vitamins, a modest dose of vitamin C and vitamin K, and a smattering of minerals like potassium and manganese. Where eggplant genuinely shines is in its polyphenol content, particularly a compound called chlorogenic acid, which drives most of the antioxidant activity researchers keep studying. The full nutritional picture is more interesting than the vitamin label alone suggests.

Which Vitamins You Actually Get From Eggplant

A one-cup serving of raw eggplant (roughly 82 grams) is extremely low in calories, coming in around 20. In terms of vitamins, the amounts are real but modest. You get a bit of vitamin C, some folate (vitamin B9), a small contribution of vitamin B6, traces of thiamine (B1) and niacin (B3), and a few micrograms of vitamin K. None of these hit a large percentage of your daily needs from a single serving. Vitamin C content, for instance, sits well below what you would get from a comparable serving of bell pepper or tomato.

That relatively low vitamin C content has been confirmed in comparative research. A study that grew peppers, tomatoes, and eggplants under the same conditions found that vitamin C was “much higher in pepper than in tomato and eggplant.”¹ So if you are eating eggplant hoping to hit your vitamin C target, you will need to pair it with other produce. Eggplant’s real nutritional appeal lies elsewhere.

The Mineral Side of the Ledger

Eggplant does better on minerals than it does on vitamins. Potassium is the standout, and a generous serving contributes meaningfully toward the daily recommendation. You also pick up magnesium, small amounts of copper, and traces of iron and zinc. A study that analyzed 25 different eggplant genotypes found that iron content ranged from about 0.2 to 0.8 mg per 100 grams of fresh weight, while copper ranged from roughly 0.05 to 0.14 mg per 100 grams and zinc from about 0.08 to 0.27 mg per 100 grams.² Those are not enormous numbers on their own, but they add up within a mixed diet.

The same comparative study that found eggplant low in vitamin C actually ranked it favorably for minerals. Among the three nightshade species tested, eggplant had the highest content of potassium, magnesium, and copper, while pepper was richer in iron.¹ This is worth remembering if you think of eggplant as nutritionally empty. It is not calorie-dense, but it carries a decent mineral profile for what it is.

Chlorogenic Acid and Polyphenols Are the Real Story

The most interesting nutritional feature of eggplant is not any single vitamin but its polyphenol content. Polyphenols are plant compounds that act as antioxidants, and eggplant is loaded with them. Chlorogenic acid is the dominant one, and it appears in concentrations that rival or exceed what you find in many other commonly eaten vegetables. A study of 30 Chinese eggplant varieties found that total polyphenol content ranged widely, from about 17,000 to nearly 40,000 micrograms per gram on a dry-weight basis, with chlorogenic acid consistently the most abundant compound.³ That same study confirmed that polyphenols and anthocyanins were the main drivers of eggplant’s antioxidant capacity.

Chlorogenic acid has drawn research interest for its potential effects on blood sugar regulation, inflammation, and cardiovascular health, though most of that evidence is still in animal models or early clinical stages. What is well established is that eggplant is one of the richer dietary sources of this compound. The deep purple skin in particular is where anthocyanins concentrate, and those pigments are themselves a class of polyphenol with antioxidant properties.

Peel Versus Flesh

If you have ever peeled an eggplant before cooking it, you may have thrown away the most nutrient-dense part. Research comparing eggplant peel to the inner flesh across multiple cultivars found that the peel generally contained higher levels of both vitamin C and phenolic compounds. Vitamin C in the flesh ranged from about 34 to 93 mg per kilogram, while in the peel it ranged from roughly 12 to 111 mg per kilogram. Phenolic compound concentrations were consistently higher in the peel, reaching up to about 29 grams per kilogram compared to around 22 in the flesh.⁴

The anthocyanins that give purple eggplant its color are almost entirely in the skin. Green and white eggplant varieties contain dramatically less of these pigments. The same 30-variety study found anthocyanin content spanning a huge range, from about 5 to nearly 980 micrograms per gram on a dry-weight basis. The green varieties sat at the bottom of that range.³ So the practical takeaway is simple: if antioxidant content matters to you, choose dark purple varieties and eat them with the skin on.

How Much Variety Matters

Eggplant is not one thing. The long, slender Asian varieties, the round Italian globes, the small Thai pea eggplants, the white and green ornamental types all differ in their nutritional profiles. The 30-variety Chinese study found that the coefficient of variation for different polyphenols ranged from about 21% to 75%, and for anthocyanins it was even wider, topping 100% for some compounds.³ In plain terms, you could pick two eggplants off the same market table and one might have vastly more antioxidant compounds than the other, depending on variety.

Mineral content varies too. The Indian genotype study found that iron content could differ by roughly fourfold between the lowest and highest varieties, and zinc by more than threefold.² This kind of variability is common in produce, but it is worth knowing because the nutrition label on a generic “eggplant” entry in a food database represents an average, not a guarantee. Season, soil, growing conditions, and cultivar all play a role.

How Cooking Changes What You Absorb

Raw eggplant is not something most people eat, and how you cook it makes a real difference to the nutrients you end up absorbing. Research on dark purple eggplant found that different cooking methods changed the bioaccessibility of phenolic compounds in a significant way. After simulated digestion, about 45% of total phenolics were bioaccessible in baked eggplant, 33% in grilled, and 22% in fried. Interestingly, though, fried eggplant had the highest absolute amount of phenolic compounds remaining after digestion, at roughly 751 mg per 100 grams.⁵

The fried eggplant finding might seem counterintuitive. The percentage that your body can access is lower, but the total pool of phenolics in fried eggplant starts higher, likely because frying disrupts cell walls and releases more compounds from the plant tissue in the first place. The practical message is that baking preserves the highest proportion of these compounds in an absorbable form, but frying is not as nutritionally wasteful as you might assume, at least in terms of polyphenol delivery. The caloric cost of all that absorbed oil is, of course, a separate conversation.

Steaming and boiling are common preparation methods too. In general, gentler cooking that does not expose eggplant to extreme heat for long periods tends to preserve more of its water-soluble vitamins, including the modest vitamin C content. If you are boiling eggplant in a large pot of water and then draining it, some of the B vitamins and vitamin C leach out into the liquid. Cooking in stews, curries, or sauces where you eat the liquid as part of the dish recaptures most of those losses.

Eggplant and Blood Pressure

Some of the more concrete health research on eggplant involves blood pressure. A randomized, placebo-controlled trial gave participants eggplant powder daily and measured the effects over 12 weeks. The results showed that eggplant intake significantly lowered both systolic and diastolic blood pressure compared to placebo, with the most pronounced effects seen in people who started with mildly elevated blood pressure.⁶ The same trial also noted improvements in psychological stress markers, though the blood pressure finding is the one that stands on the firmest ground.

One trial is not a revolution, and eggplant powder in a capsule is not the same as eating baba ganoush. But the direction of the finding aligns with what you would expect from a food high in potassium and polyphenols, both of which have established links to cardiovascular health through broader dietary research. It is one of the few human trials on eggplant specifically, which makes it more noteworthy than it might otherwise be for a single small study.

The Cholesterol Question

You may have heard that eggplant can lower cholesterol. This claim has been circulating for years, and the evidence is genuinely mixed. A review that looked at multiple human studies found a complicated picture. In one trial of 19 healthy subjects, drinking orange juice blended with fresh eggplant for three weeks did not change lipid profiles at all. In another trial with 38 people who had high cholesterol, eggplant infusion produced only a “modest and transitory” effect on cholesterol markers over five weeks. A third trial directly comparing eggplant to the statin drug lovastatin found that eggplant had no significant effect on total cholesterol, LDL, or HDL after six weeks.⁷

One trial did find that capsules containing dried eggplant powder, taken twice daily for three months, reduced total cholesterol and LDL in hyperlipidemic patients.⁷ But the overall takeaway from the review is that eggplant should not be treated as a substitute for cholesterol-lowering medication if you actually need one. The fiber content of eggplant can be part of a heart-healthy diet, and some animal studies look promising. In human trials, though, the cholesterol effects have been inconsistent at best.

Fiber as an Underrated Nutrient

When people ask about vitamins in eggplant, they sometimes overlook fiber, which is arguably the most practically significant nutrient in a typical serving. A cup of cooked eggplant provides roughly 2.5 grams of dietary fiber, mostly in the form of soluble fiber from the flesh and insoluble fiber from the skin. That is about 10% of what most adults need daily. For a vegetable that is almost entirely water and clocks in at very few calories, that is a respectable contribution.

The fiber content is part of why eggplant appears in research on metabolic syndrome. It slows digestion, helps modulate blood sugar response after meals, and contributes to the feeling of satiety that makes it easier to eat fewer calories overall. The eggplant metabolic syndrome review specifically highlighted dietary fiber as a pathway through which eggplant may positively affect lipid profiles, even when the direct cholesterol-lowering evidence in humans is shaky.⁷

Glycoalkaloids in Eggplant

Eggplant belongs to the nightshade family, which means it contains small amounts of naturally occurring compounds called glycoalkaloids. The two main ones in eggplant are solamargine and solasonine. These are the same class of compounds that make green potatoes potentially toxic in large amounts, and they occasionally raise safety questions for eggplant too.

In practice, the amounts found in commercially grown eggplant are far below levels that would cause problems. There are no established maximum guidelines for glycoalkaloid content in eggplants, unlike potatoes, which have well-defined safety thresholds.⁸ Researchers have actually been more interested in the potential anti-cancer properties of these compounds. Exposure of cancer cells to eggplant glycoalkaloids has been shown to inhibit cell growth both in lab settings and in animal models.⁸ That research is far from clinical application, but it is a reminder that the trace compounds in foods can be biologically active in ways that go beyond simple vitamin-and-mineral bookkeeping.

How Eggplant Stacks Up Against Its Nightshade Relatives

If you are choosing between eggplant, tomatoes, and peppers at the market, the nutritional trade-offs are real but not dramatic. Peppers win on vitamin C by a wide margin. Tomatoes contribute lycopene, a carotenoid antioxidant that eggplant lacks. Eggplant comes out ahead on mineral content, particularly potassium, magnesium, and copper, and dominates in chlorogenic acid.¹ In terms of total antioxidant activity measured in the lab, peppers and eggplant were roughly comparable and both outperformed tomatoes.

Sugar content is another difference that rarely comes up. Peppers and tomatoes are measurably sweeter, with higher concentrations of fructose and glucose. Eggplant is starchy and slightly bitter by comparison, with malic acid as its main organic acid rather than the citric acid that dominates in peppers and tomatoes.¹ That bitterness, incidentally, comes largely from the same polyphenols that give eggplant its antioxidant credentials. Salting sliced eggplant before cooking draws out some moisture and can reduce bitterness, though it also likely pulls a small fraction of water-soluble nutrients with it.

None of these vegetables is a complete nutritional package on its own. But if your diet routinely includes eggplant alongside other produce, it fills a particular niche: low in sugar and calories, rich in polyphenols that other common vegetables do not supply in the same concentrations, and carrying a mineral profile that complements rather than duplicates what you get from tomatoes and peppers.

1
Food Research International. Fruit composition profile of pepper, tomato and eggplant varieties grown under uniform conditions
2
Journal of Food Composition and Analysis. Variability in mineral composition of Indian eggplant (Solanum melongena L.) genotypes
3
PubMed Central. A Comprehensive Evaluation of Nutritional Quality and Antioxidant Capacity of Different Chinese Eggplant Varieties Based on Multivariate Statistical Analysis
4
Acta Alimentaria. Potential of eggplant peel as by-product
5
PubMed. Domestic cooking methods affect the stability and bioaccessibility of dark purple eggplant (Solanum melongena) phenolic compounds
6
PubMed Central. Daily Ingestion of Eggplant Powder Improves Blood Pressure and Psychological State in Stressed Individuals: A Randomized Placebo-Controlled Study
7
PubMed Central. Effect of eggplant (Solanum melongena) on the metabolic syndrome: A review
8
Journal of Agricultural and Food Chemistry. The chemistry and anticarcinogenic mechanisms of glycoalkaloids produced by eggplants, potatoes, and tomatoes