Evidence-based·Last reviewed May 30, 2026·How we grade evidence

Black Currant

Botanical

Useful mainly for people wanting an anthocyanin- and vitamin C-rich berry; mild eye-fatigue support.

Quick decision guide

May help most

people wanting an anthocyanin- and vitamin C-rich berry; mild eye-fatigue support

Common dosing range

200–500 mg/day anthocyanin extract, or 500–1,500 mg/day seed oil (60–200 mg GLA)

When to expect effects

Weeks for functional claims

Watch out for

High-dose seed oil may add to bleeding risk with anticoagulants

What is it

Black currant (Ribes nigrum) is a small dark berry native to northern Europe and Asia, prized for its high vitamin C, anthocyanin pigments, and gamma-linolenic acid (GLA) in its seed oil.

Is it worth it for you?

Use this as a quick fit check, not a diagnosis.

Worth considering if…

You want a polyphenol- and vitamin C-rich berry source
You have mild visual fatigue and want to trial anthocyanins
You prefer a food-based antioxidant intake

Probably skip if…

You want a proven treatment for an eye disease
You take blood thinners and would use high-dose seed oil
You expect strong anti-inflammatory effects

Evidence at a glance

antioxidant and vitamin c supply

Limited Evidence
Effect
Meaningful nutrient contribution
Best fit
people wanting dietary vitamin C and polyphenols
Time
Days

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

antioxidant and vitamin c supply

Biomarker support
Limited Evidence

Black currant berries provide roughly 180–200 mg vitamin C per 100 g, several times that of oranges, plus anthocyanins that act as antioxidants. This is a compositional nutrient contribution rather than a demonstrated clinical outcome. It reliably raises vitamin C and polyphenol intake.

Effect size
Meaningful nutrient contribution
Time to effect
Days
Best fit
people wanting dietary vitamin C and polyphenols

Bottom line: A genuine vitamin C and anthocyanin source, but this is a nutrient-supply claim, not disease prevention.

SourceAmini et al., 2025 — PMCTomisawa et al., 2019 — PMC

How it works

Black currant berries contain anthocyanins (notably delphinidin-3-rutinoside and cyanidin-3-rutinoside) that act as antioxidants and may support vascular function and visual adaptation. The fruit also delivers vitamin C at roughly 180 to 200 mg per 100 g, several times the level found in oranges. The seed oil contains gamma-linolenic acid (GLA), an omega-6 fatty acid converted in the body to anti-inflammatory prostaglandins (PGE1). Black currant leaf has been used traditionally for joint discomfort, though clinical evidence is limited. Anthocyanin-rich extracts may improve peripheral blood flow and have shown small effects on visual fatigue and dark adaptation in short trials. Effects depend heavily on standardization and dosing.

How to take it

1. Typical dose
200–500 mg/day anthocyanin-standardized berry extract, or 500–1,500 mg/day seed oil (60–200 mg GLA)
2. Timing
Anytime
3. With food
Seed oil with a fat-containing meal; anthocyanin extracts with or without food
4. How long to try
Several weeks of consistent use for visual or vascular claims

What to track

Visual fatigue / dark adaptation
Dietary vitamin C adequacy
Joint comfort (if using for GLA)
GI tolerance

3 commercial forms

Compare the main delivery options and what they’re best suited for.

Standardized anthocyanin extract

Used in eye health, circulation, and antioxidant products. Doses typically 200 to 500 mg.

Standardized to 25 to 35 percent anthocyanins; concentrates the visually active fraction.

Black currant seed oil

Softgel form, used for skin, hormonal balance, and joint comfort. Compete with evening primrose and borage seed oil.

Provides 12 to 17 percent GLA; fat-soluble.

Whole fruit powder or juice

Sometimes used as a vitamin C source or flavor in smoothie powders.

Food matrix; lower anthocyanin per gram.

Safety

Know the common side effects, key cautions, and who should avoid it.

Common side effects

Mild GI upset (seed oil)Headache (seed oil)

Who should avoid it

  • People on blood thinners using high-dose seed oil (consult a clinician)
  • Those with bleeding disorders or near surgery

Pregnancy & breastfeeding

Stick to food amounts in pregnancy and breastfeeding unless medically advised; avoid medicinal-dose leaf or seed oil without supervision.

Interactions

Anticoagulants/antiplatelets (warfarin, aspirin, high-dose fish oil)Moderate

Seed oil may have mild antiplatelet effects, theoretically increasing bleeding risk

Food sources

Black currant berries (fresh)

Amount
100 g
%DV
—

Black currant juice

Amount
1 cup
%DV
—

Black currant jam

Amount
1 Tbsp
%DV
—

Choosing a product

What to look for on the label — and what to be skeptical of.

Look for…

Anthocyanin standardization (for berry extract)
Stated GLA content (for seed oil)
Clear Ribes nigrum identity

Be skeptical of…

Treats or prevents eye disease
Powerful anti-inflammatory
Detox or immune-boosting claims

Frequently asked questions

Is black currant the same as black raspberry?⌄

No. Black currant (Ribes nigrum) is botanically distinct from black raspberry (Rubus occidentalis). They have different anthocyanin profiles and traditional uses.

Does black currant thin the blood?⌄

The seed oil has mild antiplatelet activity at higher doses. People on warfarin or other blood thinners should check with their clinician.

How is black currant different from evening primrose oil?⌄

Both provide GLA. Black currant seed oil also contains some alpha-linolenic acid (ALA) and stearidonic acid; evening primrose is GLA only.

References by claim

antioxidant and vitamin c supply

Amini et al., 2025 — PMC (2025) link

Tomisawa et al., 2019 — PMC (2019) link

Track Black Currant with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

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Evidence-based·Last reviewed May 30, 2026·Evidence current as of May 30, 2026·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.