Vitamin C in Foods: Which Sources Are Actually Highest?

The Top 15: Vitamin C per 100g

Why Oranges Aren't the Best Source

None of this is meant to dismiss oranges. At 53 mg per 100g, a medium orange provides roughly 60–70% of the daily RDA for most adults in a single piece of fruit. That's genuinely useful. The problem isn't that oranges are bad — it's that the cultural shorthand of "eat an orange for vitamin C" has led people to overlook dramatically richer sources they're likely already eating. The association between oranges and vitamin C is largely a product of 20th-century advertising, particularly from Florida citrus growers in the 1940s and 50s. At the time, scurvy prevention was a pressing public health concern, and oranges were an accessible, affordable fruit with a meaningful vitamin C content. The association stuck. But the USDA data has always shown that bell peppers, guavas, kiwifruit, and several cruciferous vegetables outperform oranges by a wide margin. For someone managing their intake through food alone — avoiding supplements — understanding where the real concentrations are makes a practical difference. A half-cup of raw red pepper strips at lunch gets you most of the way to your daily RDA before you've thought about it.

Peppers: The Unexpected Vitamin C Champions

All varieties of sweet bell peppers rank near the top of any vitamin C list, and the differences between them are more significant than most people realize. Red peppers contain 127.7 mg per 100g — 2.4 times the concentration found in oranges. Yellow peppers reach 183.5 mg per 100g, or 3.4 times as much. Even green bell peppers, often treated as the underripe and nutritionally inferior version, come in around 80 mg per 100g. The color difference isn't cosmetic. Red and yellow peppers are simply riper versions of green peppers, and vitamin C content climbs as the fruit matures on the plant. If you're choosing peppers specifically for their vitamin C, red and yellow are meaningfully better choices. One practical concern with any vitamin C-rich food is heat sensitivity. Vitamin C (ascorbic acid) is water-soluble and degrades with prolonged heat exposure. Roasting or sautéing peppers at high temperatures for extended periods will reduce the vitamin C content — one study found losses of 25–30% after stir-frying. That said, even cooked peppers retain substantial amounts. A 100g portion of stir-fried red peppers likely still delivers 80–90 mg of vitamin C, which is well above the daily RDA for women and approaching it for men. Eating them raw maximizes the content, but cooked is far from worthless.

How Much Vitamin C Do You Actually Need?

Best Practical Sources for Daily Intake

• Half a red pepper (approx. 75g) delivers around 96 mg of vitamin C — exceeding the daily RDA for women and meeting it for men in a single serving you can add to any salad or grain bowl.
• One cup of raw broccoli florets (approx. 91g) provides around 81 mg — a solid source that most people already eat regularly and underestimate as a vitamin C food.
• A single kiwifruit (approx. 75g) contains roughly 70 mg of vitamin C, and the SunGold (yellow) variety pushes that to around 121 mg — more than a large orange.
• One cup of strawberries (approx. 152g) delivers around 89 mg, putting it above a standard orange serving and making it an excellent high-vitamin-C option for people who find peppers or kale unappealing.
• A quarter cup of guava (approx. 41g) provides over 90 mg — a small portion with outsized nutritional return, though guava is less widely available than the other options on this list.
• For people who smoke, the RDA increases by 35 mg per day to compensate for the oxidative stress of cigarette smoke on ascorbic acid stores. Adding an extra half-cup of any of the foods above covers that gap easily.