A medium raw apple (about 182 grams) contains roughly 95 calories, 25 grams of carbohydrates, 4.4 grams of dietary fiber, and 19 grams of natural sugar. It also delivers meaningful amounts of vitamin C, potassium, and vitamin K, along with a surprisingly rich mix of plant compounds that give apples health benefits beyond their basic nutrient profile.
Macronutrients in a Medium Apple
Apples are mostly water and carbohydrates. A medium apple with skin provides about 95 calories, making it one of the lower-calorie whole fruits. Nearly all of those calories come from carbohydrates, primarily natural sugars like fructose, glucose, and sucrose. There’s almost no fat (about 0.3 grams) and minimal protein (roughly 0.5 grams).
The 4.4 grams of fiber is where apples punch above their weight. That fiber is split between two types: roughly 1.8 grams of insoluble fiber, which adds bulk and helps move food through your digestive tract, and a smaller portion of soluble fiber, including pectin. Pectin forms a gel-like substance in your gut that slows the absorption of sugar and helps feed beneficial gut bacteria. This fiber content means a single apple covers about 17% of the daily recommended intake for most adults.
Vitamins and Minerals
Apples aren’t a vitamin powerhouse the way citrus fruits or leafy greens are, but they contribute steady, moderate amounts of several micronutrients. A medium apple provides about 14% of your daily vitamin C, which supports immune function and skin repair. You also get roughly 6% of your daily potassium, a mineral that helps regulate blood pressure and fluid balance.
Vitamin K appears in smaller but notable amounts, especially when you eat the skin. The same goes for vitamin A, vitamin E, and several B vitamins. Apples also contain trace minerals like manganese, copper, and magnesium. None of these reach headline-grabbing levels on their own, but as part of a diet where you eat apples regularly, they contribute to your overall mineral intake more than most people realize.
Why the Skin Matters
Peeling an apple strips away a disproportionate share of its nutrition. A raw apple with skin contains up to 332% more vitamin K, 142% more vitamin A, and 115% more vitamin C than a peeled one. Calcium and potassium levels also drop by around 20% and 19% respectively when the skin is removed.
The skin is also where the majority of an apple’s antioxidants and fiber concentrate. In fruits generally, antioxidant levels in the peel can be hundreds of times higher than in the flesh. So while a peeled apple is still a decent snack, you lose a significant nutritional upgrade by discarding the skin. If pesticide residue is a concern, washing thoroughly under running water removes most surface residues, and that trade-off is far better than peeling.
Polyphenols and Antioxidants
Beyond standard vitamins, apples contain a complex mix of polyphenols, plant compounds that act as antioxidants in your body. The major players include chlorogenic acid (the same compound found in coffee), catechin and epicatechin (also present in green tea and dark chocolate), procyanidins, and quercetin. These compounds help neutralize free radicals, reduce inflammation, and support cardiovascular health.
Concentrations vary dramatically by variety. Research on different apple cultivars has found chlorogenic acid levels ranging from about 1.3 to 456 milligrams per kilogram of dried fruit, while catechin ranges from 0.7 to 312 milligrams per kilogram. That’s a massive spread, which means the variety you choose genuinely affects the antioxidant value of your snack. Traditional and heritage varieties tend to contain higher concentrations of these compounds than commercially bred cultivars, though even standard grocery store apples deliver meaningful amounts.
Blood Sugar Impact
Despite containing 19 grams of sugar, apples have a low glycemic index of 39 (on the scale where pure glucose equals 100). Their glycemic load, which accounts for the actual amount of carbohydrate in a typical serving, is just 6. That’s considered low, meaning a medium apple causes a gradual, modest rise in blood sugar rather than a sharp spike.
The combination of fiber, water content, and polyphenols slows the rate at which sugar enters your bloodstream. This makes apples a reasonable fruit choice for people managing blood sugar levels. Eating a whole apple is significantly different from drinking apple juice, which strips away the fiber and concentrates the sugar, producing a much faster blood sugar response.
Sugar Differences Between Varieties
Not all apples are nutritionally identical. Sweeter varieties like Fuji and Envy contain noticeably more sugar than tart varieties like Granny Smith. Research comparing cultivars found that Envy apples had total sugar concentrations around 136 grams per liter of juice, while Fuji came in around 126 grams per liter. Granny Smith, by contrast, has the highest acid content among common varieties, which is why it tastes tart despite still containing a fair amount of sugar.
If you’re watching your sugar intake closely, choosing a tart variety like Granny Smith or Braeburn over a Fuji or Gala will shave off a few grams of sugar per apple. For most people, though, the difference is modest enough that choosing whichever apple you’ll actually eat matters more than optimizing the variety.
How Storage Affects Nutrition
Most apples in grocery stores have been in cold storage for weeks or months, which raises a fair question about nutrient loss. The answer is more encouraging than you might expect. Research on apples stored at around 3°C (standard cold storage temperature) for six months found that phenolic compound levels actually increased, in some cases nearly doubling. This happens because the fruit continues metabolic processes during storage that can concentrate certain protective compounds.
Vitamin C is more fragile and does degrade over extended storage, though apples hold up better than many fruits because their thick skin limits oxygen exposure. An apple stored for a few months in proper cold conditions still retains the large majority of its nutritional value. The texture and flavor may decline before the nutrition does.
How Apples Compare to Other Fruits
Apples aren’t the most nutrient-dense fruit by any single measure. Oranges have more vitamin C, bananas have more potassium, and berries pack more antioxidants per calorie. What apples offer is a reliable, well-rounded package: decent fiber, moderate vitamins, low glycemic impact, and a broad spectrum of polyphenols, all wrapped in a fruit that stores well, travels easily, and doesn’t need refrigeration for short periods.
The real nutritional advantage of apples is consistency. They’re available year-round, affordable, and require zero preparation. A fruit you eat five days a week contributes more to your overall diet than a superfood you buy once and forget in the back of the fridge.