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Let’s talk Pure Ulva
From Terralgea Pure Ulva, 90 capsules · 625 mg

Ulva 01 / Pure Ulva

Product / Pure Ulva

Pure Ulva.

Natural iodine and B12. From one seaweed.

Three capsules a day give you almost half the iodine an adult needs, plus vitamin B12, which helps reduce tiredness and fatigue. Whole Nordic sea lettuce in a plant-based capsule. Nothing added.

49 %
of your daily iodine
3
capsules a day
30
days per pouch

449kr

inkl. mva · ships to Norway

Ships during October 2026.

Currently shipping to Norway only. Nordic and EU expansion in progress.

Every batch tested at Eurofins

What your body gets Nutrition & analysis Questions & answers

What you get

What does your body get from Pure Ulva?

Iodine and vitamin B12 are two nutrients your body can't make itself. Here is what they do for you, in wording approved in the EU.

The basis: three capsules a day provide 74 µg iodine (49 % of the reference intake) and 0.44 µg vitamin B12 (18 %). A varied, balanced diet and a healthy lifestyle matter, and a supplement doesn't replace them.

Do you have a thyroid condition, or follow an iodine-restricted diet? Talk to your doctor before you start. The same applies during pregnancy and breastfeeding.

See the numbers for every batch

Get to know the seaweed

What exactly is Pure Ulva?

Sea lettuce, dried and milled, in a plant-based capsule. That's the whole ingredient list. So why this seaweed? Here's what's worth knowing.

A green seaweed, not kelp

Sea lettuce (Ulva) is a green seaweed with thin, light-green fronds that grow along coastlines across much of the world. The frond is just two cells thick, yet it's among the fastest-growing seaweeds there are. People have eaten it for thousands of years, from the Nordics to East Asia. And it isn't kelp: brown seaweeds like kelp can hold so much iodine that it becomes too much. Sea lettuce sits far lower, and the daily dose in Pure Ulva stays well below the upper limit EFSA has set for adults.

B12 from the sea

Vitamin B12 isn't made by plants or animals, but by bacteria. In the sea, sea lettuce lives closely with these bacteria, which is why it contains B12 at all. If you eat little or no animal produce, that's exactly what makes sea lettuce interesting.

Iodine: easy to run short of

In Norway, iodine comes mainly from milk and lean fish, and table salt is only lightly iodised. The National Nutrition Council has concluded that many people get too little, especially young women and those who eat little milk and fish. Iodine isn't something your body makes. Three capsules of Pure Ulva cover almost half of what an adult needs in a day.

From sea to capsule

Four steps. No shortcuts.

  1. 01

    Cultivated

    On lines in the sea off Sweden's west coast, at Nordic SeaFarm. We harvest only what we grow ourselves.

  2. 02

    Dried

    Gently, at low temperature.

  3. 03

    Milled

    Into a fine powder. Nothing added, nothing taken out.

  4. 04

    Encapsulated

    In plant-based capsules at a GMP-certified producer. Every batch is analysed at Eurofins before it ships.

From the research

The seaweed that caught the scientists' eye

Trigo et al., Food Chemistry 483 (2025)

In 2025, researchers at Chalmers University of Technology, the University of Gothenburg and the University of Helsinki published a study of the sea lettuce species Ulva fenestrata, cultivated under controlled conditions on Sweden's west coast. Three findings worth knowing:

  1. The sea lettuce contained real vitamin B12, in biologically active forms. Not the inactive pseudo-B12 common in spirulina, for example.
  2. The content was high: more than 20 times the B12 of the red seaweed dulse, measured per gram of dry weight, and enough for the EU nutrition claim "high in vitamin B12".
  3. Drying preserved the B12, both in an oven and by freeze-drying. Blanching in 60-degree water, on the other hand, removed almost half.

The study covers the species, grown in a laboratory. It says nothing about the content of a particular pouch of Pure Ulva. That's what the analysis of each batch is for, and you'll find those numbers further down this page. Nordic SeaFarm, which grows our sea lettuce, was started by researchers from the same community in Gothenburg.

The product, in detail

Know what you take.

Vegan. Gluten-free. GMO-free. One ingredient, fully documented.

Documented, batch by batch

Every batch is independently analysed at Eurofins, an accredited laboratory. We document nutritional content, heavy metals, and microbiological safety. The Certificate of Analysis for your specific batch is available on request.

Most algae supplements have little or no batch-level documentation. That's the difference between selling a product and standing behind it.

Whole seaweed, not extract

Pure Ulva, cultivated in Nordic waters. 90 capsules × 625 mg, three a day, lasts 30 days. Plant-based capsule.

Pure Ulva is the dried whole plant. Beyond the iodine and B12, sea lettuce naturally contains dietary fibre, plant protein, marine minerals including potassium, magnesium and iron, naturally occurring fatty acids including omega-3, and the green plant pigments such as chlorophyll that give sea lettuce its colour.

These are part of the seaweed itself. We don't isolate them. We don't concentrate them. We make no claims about what we haven't measured. What we measure and document, we publish.

Where it comes from

Our seaweed is grown by Nordic SeaFarm in Bohuslän on Sweden's west coast, in cold, clean waters with a steady tidal flow. It's gently dried at low temperature, milled into a fine powder, and encapsulated.

Sea lettuce isn't an invention. People along the Nordic coastline, the British Isles, and East Asia have eaten it for thousands of years. We haven't tried to make something new of it. Just to leave it as it is.

Pure Ulva is cultivated in clean, cold waters off Sweden's west coast. Dried, milled, and encapsulated. Nothing added. Nothing extracted. What we offer is the sea lettuce itself, in a capsule.

Who it's for

Pure Ulva is suitable for adults who want a documented source of iodine and B12 in their daily routine. Especially:

  • People following plant-based or vegan diets, where B12 intake is often a concern
  • People who don't regularly eat seafood, dairy, or iodised salt
  • People who prefer whole-food supplements over isolated synthetic vitamins

Nutrition information

Declared and analysed.

Declared per daily dose

3 capsules · 1.875 g
Nutrient Per dose % NRV*
Iodine 74 µg 49 %
Vitamin B12 0.44 µg 18 %

*NRV = Nutrient Reference Value (EU Regulation 1169/2011), roughly what an average adult needs of a nutrient per day. The percentage shows how much of that daily reference one daily dose covers. The values are the mean of the five most recent batch analyses from Eurofins. The pack declares the values for the batch in the pouch.

Analysis values

Other nutrients.

Per daily dose · 3 capsules (1.875 g)

Macronutrients

Energy
16 kJ / 3.9 kcal
Fat
0.03 g
of which saturates
0.01 g
omega-3
0.01 g
Carbohydrate
0.27 g
of which sugars
0.02 g
Fibre
0.59 g
Protein
0.32 g
amino acids, total
0.32 g
Salt
0.21 g

Minerals

Magnesium
35 mg
Potassium
35 mg
Calcium
8.8 mg
Iron
0.5 mg
Zinc
18 µg
Manganese
26 µg
Selenium
0.2 µg

Vitamins

Folate
3.9 µg
Vitamin B2 (riboflavin)
5.6 µg
Vitamin B3 (niacin)
7.5 µg

*Analysis values converted to the daily dose, mean of the five most recent batch analyses from Eurofins. Not part of the nutrition declaration, and not a basis for nutrition or health claims. Some parameters are not analysed in every batch. Values may vary between batches.

How to use

Three a day.

Recommended daily dose
Three capsules with water, with or without food. Do not exceed the recommended daily dose. Food supplements should not be used as a substitute for a varied diet.
Ingredients
Dried sea lettuce (Ulva) 625 mg per capsule, HPMC capsule shell.
Storage
Store in a cool, dry place. Keep out of reach of young children.
Caution
People with thyroid conditions or on iodine-restricted diets should consult their doctor before use. Not recommended during pregnancy or breastfeeding without medical advice, due to iodine content.

Buy Pure Ulva

Pure Ulva.

90 capsules · 30-day supply · 449 kr inkl. mva

Ships during October 2026.

Delivery & terms

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