Lobster is one of the most prized shellfish on the plate — sweet, tender, and packed with protein, vitamin B12, zinc, and copper. But when it comes to vitamin C, lobster is famously low. In fact, cooked lobster meat contains essentially no vitamin C: roughly 0 mg per 100 g (3.5 oz). That makes it an ideal food for anyone who wants to know exactly what their micronutrients are doing.
This lobster vitamin C calculator takes your actual portion — in grams, ounces, pounds, or cups — and converts it into milligrams of vitamin C, then compares it to the recommended Daily Value of 90 mg. It also lets you add a squeeze of lemon juice, because in a classic lobster dinner, the lemon is where the vitamin C really comes from.
Use it for meal planning, micronutrient tracking, or simply to settle the question: “Do I get vitamin C from lobster?” (Spoiler: the lemon does.)
🦞 Lobster Vitamin C Calculator
Find out how much vitamin C your lobster portion actually provides — and how much comes from the lemon on the side.
Lobster meat portion
🍋 Lemon juice (optional)
Why Lobster Contains Almost No Vitamin C
Vitamin C (ascorbic acid) is essential for humans, but almost all animals — including crustaceans — either synthesize it themselves or get it from their diet. Lobsters eat algae and small organisms in the wild, yet the muscle meat of the tail and claws stores very little ascorbic acid. According to USDA nutrient data, cooked northern lobster contains about 0 mg of vitamin C per 100 g (3.5 oz); raw lobster is not meaningfully different.
Cooking makes the number even lower. Vitamin C is heat-sensitive, so boiling, steaming, or grilling degrades any trace that might survive in raw tissue. That is exactly why the classic lobster dinner arrives with lemon wedges: the lemon is the part of the meal that actually delivers vitamin C — roughly 5.8 mg per tablespoon of juice — while the lobster contributes protein, vitamin B12, zinc, copper, and selenium instead.
How to Use This Calculator
The calculator works in four quick steps.
- Enter the weight of cooked lobster meat and pick the unit: grams, ounces, pounds, or cups. Not sure what a serving looks like? Use a preset button for a small tail (85 g), a half cup of meat (113 g), a large tail (142 g), or a full pound (453 g).
- Optionally tick the lemon juice box and enter how much lemon juice or lemon butter you drizzle over the meat. One tablespoon of lemon juice provides about 5.8 mg of vitamin C; one teaspoon provides about 1.9 mg.
- Click Calculate Vitamin C. The result area shows the vitamin C from the lobster, the vitamin C from the lemon juice, the combined total, and the percentage of the FDA Daily Value of 90 mg that the meal covers.
- Use the Reset button to start over with a new portion.
Unit conversions are handled automatically: 1 oz = 28.35 g, 1 lb = 453.6 g, and 1 cup of cooked lobster meat weighs roughly 145 g.
Worked Examples
Example 1 — Plain tail. A 200 g lobster tail with no lemon. Lobster: 0.0 mg. Lemon juice: 0 mg. Total: 0.0 mg, 0% of the Daily Value. Lobster meat alone does nothing for vitamin C.
Example 2 — Tail and a lemon wedge. 150 g of lobster plus one tablespoon of lemon juice. Lobster: 0 mg. Lemon: 5.8 mg. Total: 5.8 mg ≈ 6.4% DV.
Example 3 — Lemon-butter feast. A 300 g whole lobster with 3 tablespoons of lemon butter. Lobster: 0 mg. Lemon butter: 3 × 5.8 = 17.4 mg. Total: 17.4 mg ≈ 19.3% DV. The lemon made the difference.
What Lobster Does Offer
Lobster's lack of vitamin C should not be mistaken for a lack of nutrition. A 100 g portion of cooked lobster is an excellent source of protein (about 19–26 g depending on preparation), vitamin B12, zinc, copper, and selenium, and it is low in saturated fat. The main thing to watch is sodium: lobster dipped in salty brine or butter can push sodium well above the roughly 500 mg you find in plain steamed meat.
Because vitamin C improves iron absorption, a lemon squeeze over lobster is doubly clever. And if you are building a vitamin C–aware plate, add broccoli, bell pepper, citrus salad, or tomatoes as a side. For comparisons across foods, the fruit vitamin C calculator is a useful companion, and the cheddar vitamin C calculator shows another popular food that comes up short on ascorbic acid.
Frequently Asked Questions
Is there any vitamin C at all in lobster? Trace amounts may appear in some samples, but the USDA nutrient database lists 0 mg per 100 g for cooked northern lobster. For practical purposes, treat lobster as having no vitamin C.
Does cooking destroy vitamin C? Yes. Ascorbic acid is heat-sensitive, so boiling or grilling degrades most of the vitamin C present in raw seafood or vegetables. That is another reason citrus fruit is such a reliable source — it is usually eaten raw.
How much vitamin C do I actually need? The FDA uses a Daily Value of 90 mg on nutrition labels, and the National Academies recommend 90 mg per day for adult men and 75 mg for adult women, with higher needs during pregnancy and breastfeeding. A single orange or half a cup of cooked broccoli covers most of that.
Are canned or frozen lobster different? Both are still negligible sources of vitamin C. Canned lobster is sometimes packed in brine, so check the sodium, but the vitamin C story does not change.
Where can I verify the nutrient data? The USDA FoodData Central database at fdc.nal.usda.gov is the authoritative public source, and the FDA publishes its Daily Value reference at fda.gov.
Vitamin C Reference Table
To put the 0 mg from lobster in perspective, here is the vitamin C content of common foods per 100 g (about 3.5 oz), based on USDA data:
| Food (100 g) | Vitamin C (mg) | % DV (90 mg) |
|---|---|---|
| Guava, raw | 228 | 253% |
| Red bell pepper, raw | 128 | 142% |
| Kiwi fruit, raw | 92.7 | 103% |
| Broccoli, cooked | 64.9 | 72% |
| Strawberries, raw | 58.8 | 65% |
| Orange, raw | 53.2 | 59% |
| Lemon juice, raw | 38.7 | 43% |
| Lobster, cooked | 0 | 0% |
Notice that 100 g of cooked lobster sits at the very bottom of this table. If you want a vitamin C boost at a seafood dinner, the lemon wedge and the side salad are doing the heavy lifting.