Lingonberry Drug Interactions, Uses, Effectiveness, Safety & More

Lingonberry (Vaccinium vitis-idaea) is a small, tart, bright-red berry that grows on a low evergreen shrub. It is closely related to the cranberry and blueberry and is part of the heath family. It grows wild across cool northern regions, including Scandinavia, Northern Europe, Russia, Canada, and parts of the northern United States.

People have eaten lingonberries for centuries, often as jam, sauce, juice, or syrup. In folk medicine, both the berries and the leaves have been used. Today, lingonberry is also sold as juice, dried berries, capsules, and extracts, mainly marketed for antioxidant and urinary tract support.

Lingonberries contain several plant compounds believed to be active. These include anthocyanins (the pigments that give the berry its red color), flavonoids, proanthocyanidins, and arbutin, along with vitamin C and other nutrients.

In laboratory studies, these compounds act as antioxidants and may reduce inflammation. Proanthocyanidins are thought to make it harder for certain bacteria to stick to the walls of the urinary tract, which is one proposed reason for the urinary benefits. Arbutin can be converted in the body into a compound with mild antimicrobial activity.

It is important to remember that most of this research comes from test-tube and animal studies. These findings do not always carry over to real benefits in people.

Lingonberries are widely eaten as food and are generally considered safe in normal dietary amounts. Concentrated supplements, juices, and leaf extracts are less studied, so their safety is less certain.

People with a history of kidney stones may want to use caution, since berries can contain oxalates. Anyone with a known allergy to berries should also be careful. The leaves contain arbutin, which the body can convert to small amounts of hydroquinone, so long-term or high-dose use of leaf products is not recommended.

For pregnancy and breastfeeding, eating lingonberries as food is likely fine, but there is not enough safety information on concentrated extracts or supplements. To be safe, avoid supplement-strength products during these times unless your doctor approves. Always check with a pharmacist or doctor before starting any new supplement, especially if you have a health condition or take medications.

When eaten as food, lingonberries rarely cause problems. Some people may notice mild digestive upset, such as stomach discomfort or loose stools, especially with large amounts of juice or dried berries.

Allergic reactions are uncommon but possible. With leaf products, taking high doses or using them for a long time is not advised because of the arbutin content. If you notice a rash, itching, swelling, or trouble breathing, stop using it and seek medical care.

There is no official or standardized dose for lingonberry supplements. The amount of active compounds can vary widely between products such as juices, dried berries, capsules, and extracts.

If you choose to use a lingonberry product, follow the directions on the product label and do not exceed the recommended amount. Because quality and strength differ between brands, it is a good idea to ask your pharmacist for help choosing a reputable product. Eating the berries as food is a simple and generally safe way to enjoy them.