What is Cloudberry?

Cloudberry is a small amber berry from a low bog plant, Rubus chamaemorus. It grows wild across northern Norway, Sweden, Finland, Russia and northern Canada. In Nordic homes it is eaten as jam, dessert sauce and cordial.

It is a food first, not a medicine. The berry is rich in vitamin C and holds plant compounds called ellagitannins. Its own benzoic acid helps it keep for months without much sugar.

Here is the honest verdict. As a food, cloudberry is a good source of vitamin C, and vitamin C prevents and treats scurvy. Beyond that, claims about treating disease have not been tested well in people.

Long use in a tradition is not proof that something works. It is also not proof that something is safe. Both of those apply here, and the rest of this page is written with that in mind.

How does Cloudberry work?

Only one part of the story is settled: the vitamin C. Vitamin C is needed to build collagen, the protein that holds skin, gums and blood vessels together. A diet short of it causes scurvy, and vitamin C from food or supplements treats that.

The rest is proposed, not proven. Cloudberry holds ellagitannins, which your gut bacteria turn into smaller compounds called urolithins. That conversion does happen in people, but what it does for health is still unclear.

In test tubes, cloudberry extracts mop up reactive molecules and slow the growth of some bacteria. Lab results like these do not tell you what happens in a person who eats jam.

Some lab and animal work suggests berry polyphenols may calm inflammation signals. This has not been shown for cloudberry on its own in human trials.

Cloudberry seed oil is pressed from the pips and used on skin. It carries fats and vitamin E that help hold water in the outer skin layer. Small cosmetic studies support basic moisturising, which is what any good plant oil does.

What forms does Cloudberry come in?

Most people meet cloudberry as food, and that is the form with the longest safety record.

Common forms:

Fresh or frozen berries, sold mainly in Nordic countries.

Jam and dessert sauce, often served with cheese or waffles.

Juice, cordial and syrup.

Freeze-dried powder, sold as a smoothie or baking ingredient.

Capsules and extracts, sold as food supplements.

Seed oil, used in face creams, balms and serums.

Liqueur, such as Finnish lakkalikööri. This is an alcoholic drink, not a health product.

Dried leaves are sometimes sold for tea. There is very little modern research on the leaf, so treat it as the least studied form.

Where it comes from:

Cloudberry was prized across the Nordic north long before anyone measured vitamin C. Sámi and coastal communities gathered it in late summer from open bogs. It was sometimes called Arctic gold, because a good patch was worth guarding.

Berries were packed in water or in their own juice and kept in cool cellars. They lasted the winter without sugar. Sailors and northern households carried them on long journeys, and crews were said to stay free of scurvy on them.

Folk use also included the leaves, brewed as a tea for upset stomachs and urinary complaints. That use was never tested and is not supported today.

The berry still carries strong cultural weight. It appears on the Finnish two-euro coin and in national desserts across the region.

What does Cloudberry help with?

• Vitamin C intake and preventing scurvy: This is the one claim that holds up. Vitamin C prevents and treats scurvy, and cloudberry is a good food source of it. Nordic households relied on stored berries through the winter for exactly this reason. Two honest limits. Heat and long storage cut the vitamin C in jam and juice. And any vitamin C source works the same way, so cloudberry is not special here.
• General nutrition and fibre in the diet: Eating cloudberry adds fruit, fibre and plant compounds to your diet. That is a reasonable thing to do and needs no special claim. No trial shows that cloudberry alone changes your risk of any disease. Most Nordic research tested mixed berry diets, so the results cannot be credited to this berry.
• Dry skin, as a seed oil used on the skin: Cloudberry seed oil works as a moisturiser. Small cosmetic studies show it helps the skin hold water, as other plant oils do. Stronger claims about anti-ageing or repair are marketing, not findings. There is no good human evidence that it treats eczema, acne or any skin disease.
• Folk use for stomach upset (leaf tea): Nordic folk practice used cloudberry leaf tea for mild stomach trouble. The leaves hold tannins, which taste astringent and bind protein in test tubes. No human trial supports this use. If stomach symptoms last more than a few days, that needs a doctor, not a tea.
• Folk use for urinary complaints (leaf tea): Leaf tea was also taken for burning or frequent urination. This echoes the wider Nordic habit of using Rubus and Vaccinium leaves this way. There is no human evidence for it. A urine infection can spread to the kidneys, so do not treat one with tea.

Which foods are rich in Cloudberry?

1. Fresh cloudberries
2. Frozen cloudberries
3. Cloudberry jam and dessert sauce
4. Cloudberry juice and cordial
5. Freeze-dried cloudberry powder

Practical Tips:

Cloudberry is itself a food, so the simplest way to use it is to eat it.

Fresh and frozen berries keep the most vitamin C. Cooking, long storage and heat during jam-making lower it.

If vitamin C is what you are after, many everyday foods supply it well. Blackcurrant, kiwi, peppers, citrus and broccoli are all good sources and cost far less.

What are the side effects of Cloudberry?

• Loose stools or wind after eating a large amount
• Mild stomach ache from the acidity
• Itchy mouth or lips in people allergic to rose-family fruit
• Hives or rash in people sensitive to benzoates
• Rarely, a whole-body allergic reaction with swelling and trouble breathing
• Skin irritation from seed oil in people with sensitive skin

Good to know:

Side effects are uncommon and usually mild. For most people cloudberry is simply fruit.

The main real risk is allergy. People who react to raspberry, strawberry or blackberry can react to cloudberry too, because they are related plants.

Severe reactions are rare but possible, as with any fruit. Swelling of the lips, tongue or throat, or any trouble breathing, is an emergency.

Concentrated powders and capsules have not been studied for long-term safety. That is a gap in knowledge, not a known danger.

How much Cloudberry should you take?

• Recommended daily: Cloudberry is a food, so there is no set dose for the fresh or frozen berry. A normal fruit portion is a handful, the same as you would eat of any berry. Supplement labels differ a lot. Freeze-dried powders often carry a serving of about 5 to 10 grams. Capsule products vary too much to summarise. These are label figures, not advice for you. If you take a concentrated product, follow its own label and ask a pharmacist if you take regular medicines. Seed oil for skin is used in small amounts, a few drops, as any face oil is.
• Best time of day: Time of day does not matter. There is no evidence that morning or evening makes any difference. Eat it whenever you would eat fruit. Seed oil on skin is usually applied after washing, while the skin is still slightly damp.
• With or without food: Either is fine. The berry is food, so the question barely applies. One useful detail: vitamin C helps your body take up iron from plant foods. Eating cloudberry with a meal of beans, lentils or grains may help with that. That same effect is a reason for caution if you store too much iron. See the safety section.
• Time to effect: For most claimed uses, it may do nothing at all, and you should expect that. If your diet is genuinely short of vitamin C, correcting that helps within days to a few weeks. Scurvy symptoms such as bleeding gums improve quickly once vitamin C is restored. That is a real but uncommon situation in most countries. For skin, a seed oil feels better within minutes, because that is what moisturisers do. Nothing deeper has been shown. No timeline can be given for the vague claims made about berry extracts, because no good human trial has measured one.
• How long to take it: As a food, cloudberry can be part of your diet year round, as any fruit can. For concentrated powders and capsules, no safe long-term duration has been studied. There is no trial data on taking them for months. If you are using a supplement for a symptom and nothing has changed after a few weeks, that is a sign to stop and get the symptom checked.