A medium apple provides modest amounts of several vitamins and minerals, with vitamin C and potassium as the standouts. It won’t cover a large share of your daily needs for any single nutrient, but apples deliver a broad mix of micronutrients alongside fiber and a surprisingly rich collection of plant compounds that don’t show up on a standard nutrition label.
Vitamins in a Medium Apple
A medium apple with skin (about 182 grams) contains roughly 8 mg of vitamin C, which covers about 9% of the daily value. That’s not orange-level, but it’s a meaningful contribution if you’re eating apples regularly. Beyond vitamin C, you’ll get small amounts of several B vitamins: about 0.05 mg of vitamin B6 and 0.04 mg of riboflavin (B2). There’s also a trace of vitamin K at just under 1 microgram.
Vitamin A is present in small quantities, mostly as beta-carotene concentrated in the skin. This is one nutrient where peeling makes a dramatic difference: an unpeeled apple contains up to 142% more vitamin A than a peeled one. The same pattern holds for vitamin C (115% more with the skin) and vitamin K (332% more). If you’re eating apples for their nutrient content, the skin is doing a lot of the work.
Key Minerals
Potassium is the most abundant mineral in apples, with a medium fruit providing around 195 mg. That’s roughly 4% of the daily value, comparable to what you’d get from a cup of cooked broccoli. You’ll also pick up small amounts of calcium, magnesium, phosphorus, and manganese. Keeping the skin on adds about 20% more calcium and 19% more potassium compared to a peeled apple.
None of these mineral amounts are particularly high on their own. Apples aren’t a mineral powerhouse the way leafy greens or nuts are. Their value is more cumulative: because most people eat them often, those small daily contributions add up over time.
Fiber: Soluble and Insoluble
A medium apple delivers about 4 grams of total dietary fiber, which is roughly 14% of the daily value. That fiber breaks down into two types. The soluble portion, which includes pectin, dissolves in water and forms a gel-like substance in your gut that helps slow digestion and can modestly lower cholesterol. The insoluble portion adds bulk and keeps things moving through your digestive tract.
According to data from Oklahoma State University, a medium apple contains about 0.28 grams of soluble fiber and 1.79 grams of insoluble fiber, with the remainder coming from other fiber components not captured in that simple split. Pectin, the compound apples are most famous for, acts as a prebiotic, feeding beneficial gut bacteria as it ferments in the large intestine.
Antioxidants Beyond the Vitamin Label
The most nutritionally interesting thing about apples may be what doesn’t appear on the nutrition facts panel. Apples are a significant dietary source of phenolic compounds, a broad family of plant-based antioxidants. The major players include chlorogenic acid, catechin, epicatechin, and quercetin. Each of these acts slightly differently in the body, but collectively they help neutralize unstable molecules that can damage cells.
The distribution of these compounds varies between the peel and the flesh. In the flesh, catechin, epicatechin, and chlorogenic acid dominate, making up about 97% of total phenolics. The peel, on the other hand, is rich in quercetin (bound to sugar molecules called glycosides) and epicatechin, which together account for roughly 68% of the peel’s phenolic content. The peel also contains pigment compounds called anthocyanins, particularly in red-skinned varieties, which give the fruit its color and have their own antioxidant activity.
Concentrations vary widely across apple varieties. Research published in the Journal of the Science of Food and Agriculture found that total phenolic levels in apple peel ranged from about 1,157 to 5,119 micrograms per gram of dry weight depending on the cultivar. That’s a nearly fivefold difference, which means variety choice matters if you’re trying to maximize antioxidant intake. As a general rule, tart and deeply colored varieties tend to land higher on this scale.
How Storage Affects Nutrient Content
Cold storage preserves apple nutrients well. Research from Agriculture Canada found that apples stored at 0°C (32°F), the standard temperature for commercial cold storage, retained virtually all of their vitamin C over a four-and-a-half-month period, holding steady at about 7 mg per 100 grams of fruit.
Warmer storage is a different story. Apples kept at 15°C (59°F), roughly the temperature of an unheated garage or a warm countertop, lost about two-thirds of their vitamin C in just seven weeks. The takeaway is practical: refrigerate your apples. A countertop apple bowl looks nice but costs you nutrients over time, especially if the fruit sits there for more than a few days.
Processing takes a heavier toll than storage temperature. Apple juice retains negligible vitamin C after even a short shelf life, dropping to 0.2 mg or less per 100 ml within about two weeks of canning. A whole, refrigerated apple delivers far more micronutrients than the equivalent amount of juice.
How Apples Compare to Other Fruits
Apples aren’t the most nutrient-dense fruit you can eat. An orange has roughly ten times the vitamin C. A banana has nearly twice the potassium. Berries far outpace apples in total antioxidant concentration per gram.
What apples have going for them is consistency. They’re inexpensive, available year-round, store well for months without meaningful nutrient loss, and most people actually eat them regularly. A fruit you eat five days a week contributes more to your overall nutrition than a superfood that sits in the fridge until it goes bad. The combination of fiber, modest vitamins and minerals, and a diverse set of antioxidant compounds makes apples a solid everyday fruit, even if no single nutrient stands out on its own.