Black currant
Black currant

Background

Black currant (Ribes nigrum) is a shrub that grows to about 1-2 meters tall. It makes edible, purple-black berries that taste sweet and contain a seed.

Black currant seed oil contains a chemical called gamma-linolenic acid (GLA). GLA might improve immune function and help decrease swelling. Black currant berries contain chemicals called anthocyanins, which have antioxidant effects. There is interest in these chemicals to prevent skin aging and wrinkles.

People use black currant for eczema, gout, high cholesterol, high blood pressure, muscle fatigue, wound healing, and many other conditions, but there is no good scientific evidence to support these uses.

Don't confuse black currant with gamma-linolenic acid (GLA), omega-6 fatty acids, borage, evening primrose, or flaxseed oil. These are not the same.
When taken by mouth Black currant berries, leaves, and flowers are commonly consumed as foods. Black currant juice, extract, and seed oil are likely safe when used appropriately as medicine.

When applied to the skin: There isn't enough reliable information to know if any part of black currant is safe or what the side effects might be.

Special Precautions & Warnings:

Pregnancy and breast-feeding: There isn't enough reliable information to know if black currant is safe to use when pregnant or breast-feeding. Stay on the safe side and avoid use.

Bleeding disorders: Black currant seed oil might slow blood clotting. This might increase the risk of bruising and bleeding in people with bleeding disorders.

Surgery: Black currant seed oil might slow blood clotting. This might increase the risk of bleeding during and after surgery. Stop taking black currant seed oil at least 2 weeks before a scheduled surgery.

Effectiveness

There is interest in using black currant for a number of purposes, but there isn't enough reliable information to say whether it might be helpful.
Likely effective Effectiveness definitions
Possibly effective Effectiveness definitions
Likely ineffective Effectiveness definitions
Possibly ineffective Effectiveness definitions
Insufficient evidence Effectiveness definitions

Dosing & administration

Black currant berries, leaves, and flowers are commonly consumed as foods.

As medicine, black currant seed oil has most often been used by adults in doses of 3-10.5 grams by mouth daily for up to 24 weeks. Speak with a healthcare provider to find out what dose might be best for a specific condition.

Interactions with pharmaceuticals

Medications that slow blood clotting (Anticoagulant / Antiplatelet drugs)

Interaction Rating=Moderate Be cautious with this combination.

Black currant seed oil might slow blood clotting. Taking black currant seed oil along with medications that also slow blood clotting might increase the risk of bruising and bleeding.

Phenothiazines

Interaction Rating=Moderate Be cautious with this combination.

Taking black currant seed oil with phenothiazines might increase the chance of having a seizure in some people.

Interactions with herbs & supplements

Herbs and supplements that might slow clotting: Black currant seed oil might slow blood clotting and increase the risk of bleeding. Taking it with other supplements with similar effects might increase the risk of bleeding in some people. Examples of supplements with this effect include garlic, ginger, ginkgo, nattokinase, and Panax ginseng.

Interactions with foods

There are no known interactions with foods.
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This monograph was last reviewed on 31/05/2023 10:00:00 and last updated on 18/10/2022 06:51:01. Monographs are reviewed and/or updated multiple times per month and at least once per year.
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