Food
Lemon & Vitamin-C Foods
Citrus, berries, peppers, and greens supply vitamin C to support the immune system.
⤢📊 How it ranks (our editor score) — 92/100Tap to see the breakdown
🌱 What it is
Lemons are sunny yellow citrus fruits. Their juice is sour, but it adds fresh flavor and a good dose of vitamin C.
📜 Where it comes from
Citrus fruits rich in vitamin C entered the medical record dramatically in the eighteenth century, when British ship's surgeon James Lind found that citrus prevented scurvy among sailors, though the vitamin itself was not isolated until the 1930s. Long before that, various cultures reached for sour lemons and citrus for general vigor and to settle the stomach. Vitamin C rich eating became a hallmark of modern nutrition advice once the vitamin was understood.
✨ Why it's good for you
- Good source of vitamin C for immune support
- Adds flavor so you can use less salt
- Warm lemon water feels great on a sore throat
🥗 Nutrition
Per 1 medium lemon (58g) · about 17 calories
- Vitamin C 30mg
- Fiber 1.6g
- Potassium 80mg
- Folate 6mcg
Source: USDA FoodData Central
🥄 How to use it
Add fresh fruit and vegetables to each meal; warm lemon water can soothe a scratchy throat.
Why it works: Nutrition scientists explain that vitamin C supports the immune cells that fight off infection and helps the body build and repair connective tissue, which is why citrus and other vitamin C foods are often suggested when a cold sets in.
🔬 Let's get technical
The scientific view, plainly reported. Hover a dotted word for its meaning.
What's in it
The relevant compound in citrus, berries, peppers, and leafy greens is , the reduced, biologically active form of vitamin C, along with citrus such as hesperidin and naringenin that occur alongside it in the same foods.
Mechanism of action
is a water-soluble antioxidant that donates electrons to neutralize , protecting cell membranes and DNA from oxidative damage. It also serves as an enzymatic cofactor for prolyl and lysyl hydroxylase, the enzymes that stabilize 's triple-helix structure, which is why vitamin C deficiency classically impairs wound healing and connective-tissue integrity. In the gut, vitamin C converts dietary to its more absorbable ferrous form, improving iron when eaten alongside plant-based iron sources. It also supports several steps of white blood cell function, including and activity, which underlies its long-standing association with immune support, though oral doses raise blood levels far less than intravenous administration.
Current pharmacological applications
Vitamin C is an essential nutrient with an established Recommended Dietary Allowance, and its intake is tracked through recognized deficiency (scurvy) and toxicity thresholds. Multiple randomized trials have tested vitamin C supplementation against the common cold; the pooled evidence shows it does not meaningfully reduce the chance of catching a cold in the general population, though regular supplementation has been associated with modestly shorter or milder episodes in some analyses. High-dose intravenous vitamin C remains an active area of oncology-adjacent research, though this differs pharmacokinetically from dietary or oral supplement intake and its clinical role remains unsettled.
Every underlined word is collected on the technical glossary.
⚠️ Cautions
- Very acidic drinks can soften tooth enamel — rinse with water after.
📚 Learn more
🌿 Deeper natural detail
💬 Ask Remy about Lemon & Vitamin-C Foods
📚 Resource confidence
Based on mentions in health references
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