One medium lemon delivers about 31 mg of vitamin C; size, juice yield, and handling change the total.
Why This Question Matters
You squeeze citrus into water, bake with it, and grate zest over salads. Knowing how much ascorbic acid a lemon holds helps you plan meals, meet daily targets, and stop guessing. You’ll also see how fruit size, juicing, and storage shift the numbers so you can make swaps with confidence.
How Many Milligrams Of Vitamin C Per Lemon (By Size)
Lab references list lemon flesh at roughly 53 mg per 100 g. That lets you scale by the weight of the edible portion. Here’s what that looks like in kitchen terms:
- Small lemon (about 58 g edible): ~31 mg
- Large lemon (about 84 g edible): ~44 mg
- One cup of sections (212 g): ~112 mg
Those figures come from standardized datasets that measure whole fruit without peel and report nutrients per 100 g, which you can then convert to common portions.
Table: Vitamin C In Lemons And Juice
(Values rounded; fresh fruit and juice vary by cultivar, season, and storage.)
| Portion | Typical Amount | Vitamin C (mg) |
|---|---|---|
| Small Whole Lemon | 58 g edible | ~31 |
| Large Whole Lemon | 84 g edible | ~44 |
| Fresh Lemon Juice | 1 Tbsp (15 g) | ~5.8 |
| Fresh Lemon Juice | 1 fl oz (30 g) | ~11.6 |
| Lemon Sections | 1 cup (212 g) | ~112 |
What About Lemon Juice Versus Whole Fruit?
Raw juice tests around 38.7 mg per 100 g. That converts to roughly 5.8 mg in a tablespoon and about 11–12 mg in an ounce. Squeezed juice drops the fiber you’d get from the flesh, so the drink delivers ascorbic acid without the same fullness. Bottled products from concentrate often land lower per ounce than fresh due to processing, storage time, and added water. Check the Nutrition Facts panel on any bottle for the value listed per serving.
Daily Needs And How A Lemon Helps
Most adults need around 75–90 mg per day, with higher targets during late pregnancy, lactation, and for people who smoke. A medium fruit can cover a third to nearly one half of that range. Pair citrus with other produce—bell peppers, strawberries, kiwi, broccoli—and you’ll meet the day’s target with regular meals. See the NIH vitamin C RDAs for life-stage details.
How Much Juice Comes From One Lemon?
Yield swings with variety and freshness. As a kitchen rule:
- Small fruit: about 2 tablespoons
- Large fruit: about 3–4 tablespoons
Using the fresh-juice value above, two tablespoons provide roughly 11–12 mg. A large, juicy fruit at four tablespoons gives around 23 mg.
Factors That Change The Number
Fruit And Farm Factors
Different cultivars, growing region, and season lead to natural spread in nutrient levels. Sunlight and time on the tree shift sugar and acid, which can correlate with juice yield and measured vitamin C.
Storage And Handling
Longer storage tends to lower fragile water-soluble vitamins. Keep lemons chilled, avoid long sits on a warm counter, and use cut fruit within a couple of days.
Heat, Air, And Light
Heat reduces ascorbic acid. Shorter cook times preserve more. Air and light also speed loss. Cover fresh juice and refrigerate promptly.
Smart Ways To Get The Most From Lemons
- Zest and juice: zest carries fragrant oils; add near the end of cooking for a bright finish.
- Finish off heat: turn off the burner, then add juice to soups or vegetables.
- Cap the jar: store fresh juice in a closed container for up to three days; shake before using.
- Use a hand press: a simple press extracts more juice than squeezing by hand and helps keep seeds out.
Practical Conversions You Can Use
- 1 Tbsp fresh juice ≈ 5.8 mg vitamin C
- 2 Tbsp fresh juice (about half a lemon) ≈ 11–12 mg
- 1 oz fresh juice ≈ 11–12 mg
- 100 g lemon flesh ≈ 53 mg
- 1 medium lemon (58 g edible) ≈ 31 mg
These conversions let you adjust recipes, scale a drink, and estimate intake without doing fresh math each time.
Is Lemon Water A Good Source?
A glass of water with the juice of half a lemon tastes bright and adds around 11–12 mg when freshly squeezed. It won’t match a bowl of strawberries, but it’s a handy add-on that also nudges fluid intake during the day. To protect teeth, sip through a straw and rinse with plain water afterward.
Do You Need A Supplement?
Most people can meet needs with food. A mixed plate with citrus, peppers, leafy greens, potatoes, and fruit covers the bases. If your intake is low or your clinician suggested a pill, common products use ascorbic acid, and research does not show one form outperforming others for absorption. The NIH consumer fact sheet covers forms, dosing ranges, and upper limits. Stay within advised limits unless a professional gives specific guidance.
How Lemons Compare To Other Citrus
Per 100 g of edible portion, a simple snapshot looks like this:
Table: Citrus Vitamin C Snapshot
| Fruit | Per 100 g | Quick Take |
|---|---|---|
| Lemon | ~53 mg | Versatile acid for dressings and tea |
| Orange | ~53 mg | Easy snack and juice base |
| Lime | ~29 mg | Great for marinades and salsas |
How To Measure At Home
With A Kitchen Scale
- Peel if your recipe uses only the flesh; remove obvious seeds.
- Weigh the edible portion in grams.
- Multiply grams by 0.53 to estimate mg of vitamin C (since 100 g ≈ 53 mg).
Example: 70 g of edible lemon ≈ 70 × 0.53 ≈ 37 mg.
Without A Scale
- Use the size rules: 58 g for a small fruit, 84 g for a large fruit.
- For juice, assume 1 Tbsp ≈ 5.8 mg when freshly squeezed.
Fresh Juice Versus Bottled Juice
Fresh-squeezed tends to test higher per ounce than shelf-stable. Processing, added water, and time on a warm shelf can lower the result on the label. If you rely on bottled juice, read the panel and count the listed mg per stated serving. For cooking, fresh juice also brings brighter aroma because the fragrant oils in the zest often join the party during squeezing.
Simple Ways To Add More
- Morning: lemon water plus a kiwi.
- Lunch: squeeze over lentil salad; add red pepper strips.
- Dinner: finish roasted broccoli with garlic and a splash of juice.
- Snacks: citrus wedges with yogurt.
Method Notes And Limits
The amounts above come from standardized nutrient references that measure whole fruit and raw juice, then report values per 100 g. Real lemons vary, so treat the per-fruit numbers as useful estimates rather than lab guarantees. Processing and storage can lower the content in bottled juice. Fresh-squeezed tends to come out higher per ounce than shelf-stable products.
Safety And Sensible Use
Citrus fits many eating patterns. People with reflux might prefer smaller amounts. Acid can rough up enamel; use a straw, drink water after, and pause before brushing. If your iron comes mainly from plants, pairing beans or greens with lemon boosts absorption from that meal.
Bottom Line
A typical medium lemon gives about 31 mg of vitamin C. Go larger and you’ll be near 44 mg. Even a small squeeze adds a useful bump to the day’s tally, and pairing lemons with other produce makes meeting daily needs simple.