Edible parts
Seaweed (as sold)
Nutrition per 100 g
Closest official match: Seaweed, dried (USDA FNDDS 2709988)
Food data (CoFID / USDA). Energy and macros show % RI; vitamins and minerals show % NRV (UK) where a reference exists. Curiosity about the plant — not a diary score.
Reference intake
Reference intake of an average adult (8 400 kJ / 2 000 kcal)
| Nutrient | Per 100 g | % RI |
|---|---|---|
| Energy | 1247 kJ / 298 kcal | 15% |
| Protein | 31.8 g | 64% |
| Carbohydrate | 52.4 g | 20% |
| Natural sugars | 3.04 g | 3% |
| Fat | 4.01 g | 6% |
| Saturated fat | 1.36 g | 7% |
Fibre, fats & omega-3
| Nutrient | Per 100 g |
|---|---|
| Fibre | 5.6 g |
| Monounsaturated fat | 0.35 g |
| Polyunsaturated fat | 1.09 g |
| Omega-3 (ALA) | 0.46 g |
Vitamins & minerals
| Nutrient | Per 100 g | % NRV (UK) |
|---|---|---|
| Vitamin A | 14 µg RAE | 2% |
| Vitamin C | 5 mg | 6% |
| Vitamin E | 5 mg | 42% |
| Vitamin K | 25 µg | 33% |
| Folate | 337 µg | 169% |
| Thiamin (B1) | 1.2 mg | 109% |
| Riboflavin (B2) | 1.95 mg | 139% |
| Niacin (B3) | 6.51 mg | 41% |
| Vitamin B6 | 0.33 mg | 24% |
| Choline | 64.6 mg | — |
| Calcium | 372 mg | 47% |
| Iron | 25 mg | 179% |
| Magnesium | 482 mg | 129% |
| Potassium | 1244 mg | 62% |
| Zinc | 3.9 mg | 39% |
| Copper | 3.36 mg | 336% |
| Phosphorus | 85 mg | 12% |
| Selenium | 7.3 µg | 13% |
| Sodium | 575 mg | — |
µg is 1,000× smaller than mg — compare the % daily value, not the raw numbers. More
Vitamin D: plants have about none (the source rows say 0). UV-exposed mushrooms are the exception, and fortified packs vary, so check the pack.
Per 100 g · CoFID / USDA · % RI and % NRV UK · not medical advice
Figures: Seaweed, dried (USDA FNDDS 2709988), closest row. Nutrients the row does not report are left blank.
Prep notes
Eaten as sold or prepared at home. Atlas figures are per 100 g food data (CoFID / USDA), not a cooked dish with oil or salt unless the row says so.
Caution
Grocery / shop food data only. Not a wild forage guide. Thrive shows composition curiosity — not medical advice.
Answer-ready
Sea lettuce (Ulva lactuca) is listed in Thrive’s plant atlas under seaweed. Nutrition below is per 100 g with % NRV (UK) where a reference exists — food data for curiosity, not a diary score or medical claim. Edible part covered here: Seaweed (as sold).