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Dietary supplement

GLA 90 Black Currant Oil Ingredients & Drug Interactions

by Genestra Brands

GLA 90 Black Currant Oil label
See full label image
Softgel Capsule Category: Fat/fatty Acid
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 30, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking GLA 90 Black Currant Oil against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

GLA 90 Black Currant Oil is a dietary supplement by Genestra Brands with 1 active ingredient. Its ingredients are commonly taken for dry eyes and eye strain, joint pain and inflammation, immune and general wellness support.Based on those ingredients, 226 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Black Currant seed Oil. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against GLA 90 Black Currant Oil by Genestra Brands

Ask about any prescription or over-the-counter medication and we check it for interactions with GLA 90 Black Currant Oil by Genestra Brands — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of GLA 90 Black Currant Oil by Genestra Brands

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 30, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 5 of its 5 active ingredients.
  • “Black Currant seed Oil” is listed as a grouped ingredient — the label gives one combined amount (1,000 mg) without saying how much of each component you get.

GLA 90 Black Currant Oil contains five active ingredients. The product delivers gamma-linolenic acid, linoleic acid, oleic acid, alpha-linolenic acid, and stearidonic acid — a mix of essential and beneficial fatty acids sourced from black currant seed oil.

These are the working components of the formula. The softgel capsule itself also contains gelatin, glycerin, and purified water as inactive ingredients that help deliver the oils.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed

This product doesn't appear to be marketed for a specific use, so we graded Oleic Acid's overall clinical evidence instead.

Moderate

Some clinical evidence supports Oleic Acid for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Coronary heart disease (CHD) — rated "Possibly Effective" (Natural Medicines).
  • On file: Hypercholesterolemia — rated "Possibly Effective" (Natural Medicines).

We hold effectiveness data for oleic acid only. It's rated possibly effective for high cholesterol and coronary heart disease based on the evidence we have.

For the other active ingredients in this product — gamma-linolenic acid, linoleic acid, alpha-linolenic acid, and stearidonic acid — the evidence isn't established in our data.

The evidence, ingredient by ingredient Black Currant Oleic Acid

How safe is it?

Some data gaps
Safety Information · database check
Some gaps

Safety data exists for these ingredients, but with some important gaps.

Why this rating?
  • We hold adverse-effect (side-effect) data for 0 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Oleic acid is generally well tolerated in the amounts normally found in foods like olive oil. However, the safety notes we hold indicate that concentrated supplement-level doses haven't been well studied in pregnancy or during breastfeeding.

If you're pregnant or nursing, talk with your doctor or pharmacist before taking this product — there isn't enough data to know either way. No serious adverse effects are listed in our data for the ingredient we could assess.

Side effects, ingredient by ingredient Black Currant Oleic Acid

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Oleic Acid.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: diabetes medications.
  • For scale: 86 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

If you take antidiabetes drugs or blood sugar medications, check with your doctor or pharmacist before using this product. Oleic acid may increase how well these drugs work.

We were unable to check the other fatty acids in the formula, so run your exact medications through the tool on this page before taking it.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and some safety-information gaps remain.

GLA 90 Black Currant Oil may be worth considering if you're interested in omega fatty acids and possibly supporting cholesterol or heart health — though the evidence is preliminary. If you take diabetes or blood sugar medications, you'll need to check with your doctor or pharmacist first, since oleic acid might strengthen their effect.

Pregnant or breastfeeding? The same goes — talk it over before you start.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 5 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jul 23, 2020.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about GLA 90 Black Currant Oil, straight from the product label.

Brand Genestra Brands
Barcode (UPC) 883196123704
Net contents 90 Softgel Capsule(s)
Market status On market
Date entered into DSLD Jul 23, 2020
DSLD ID 230836
Product type Fat/fatty Acid
Supplement form Softgel Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years)
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for GLA 90 Black Currant Oil by Genestra Brands, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
2 Capsule(s)
Maximum serving Sizes:
2 Capsule(s)
Servings per container
45
UPC/BARCODE
883196123704
IngredientAmount% DV
Calories10 Calorie(s)--
Gamma-Linolenic Acid170 mg--
Total Fat1 Gram(s)1%
Linoleic Acid430 mg--
Oleic Acid90 mg--
Alpha-Linolenic Acid130 mg--
Stearidonic Acid24 mg--
Black Currant seed Oil1000 mg--

Other ingredients: Gelatin, Glycerin, purified Water

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Suggested/Recommended/Usage/Directions

Recommended Dose: Take 2 capsules 2 times daily or as recommended by your health professional.

Precautions

Warning: If you are pregnant or lactating, have any health condition or are taking any medication, consult your health professional before use.

Use only if safety seal is intact.

Keep out of the reach of children.

Storage

Store in a cool, dry place.

FDA Disclaimer Statement

This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

General Statements

Contents may not fill package in order to accommodate required labeling. Please rely on stated quantity. Scan to learn about our quality excellence

FDA Statement of Identity

Dietary Supplement

Formulation

Promotes skin health

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

GLA 90 Black Currant Oil by Genestra Brands label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

GLA 90 Black Currant Oil label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in GLA 90 Black Currant Oil by Genestra Brands

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size2 Capsule(s) Dosage formSoftgel Capsule Servings per container45 Amounts shown are per serving.

Black Currant seed Oil

Interacts with
140 drugs
1000 mg per serving

Black currant is a nutritious berry that is rich in vitamin C and antioxidants, and its seed oil contains the omega-6 fatty acid GLA. While it is enjo...

Black Currant seed Oil monograph & interactions
  • › Gamma-Linolenic Acid
  • › Linoleic Acid
  • › Oleic Acid
  • › Alpha-Linolenic Acid
  • › Stearidonic Acid

Other (inactive) ingredients: Gelatin, Glycerin, Purified Water. These complete the product’s ingredient list but are not active constituents.

Interaction report

GLA 90 Black Currant Oil by Genestra Brands Drug Interactions

Want to check YOUR meds against GLA 90 Black Currant Oil?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
226Drugs
226 Moderate

Ingredients driving the most interactions

Black Currant seed Oil 140

Individual Drug Interactions

The ingredients in GLA 90 Black Currant Oil interact with 226 drugs. Click any drug to see the details.

1 of the 1 ingredient in GLA 90 Black Currant Oil interact with drugs. Each result below shows which ingredient is responsible. Black Currant seed Oil

Each ingredient & the kinds of drugs it affects

For each ingredient in GLA 90 Black Currant Oil with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Black Currant seed Oil2 drug types · 140 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.
Gamma-linolenic acid (GLA), a constituent of black currant seed oil, appears to have antiplatelet effects.

Likelihood Possible Evidence D
Phenothiazines

Theoretically, black currant seed oil might increase the risk of seizure in patients receiving phenothiazines.
Black currant seed oil contains gamma-linolenic acid (GLA). There is some concern that taking supplements containing GLA might cause seizures, or lower the seizure threshold, when taken with phenothiazines, although there is no evidence that black currant seed oil causes seizures. In one report, three patients with schizophrenia who had received phenothiazines developed EEG changes suggestive of temporal lobe epilepsy after starting treatment with GLA, although none experienced an actual seizure. In another report, two patients with schizophrenia who were stabilized on phenothiazines developed seizures when evening primrose 4 grams daily, which contains GLA, was added. One of these patients had a prior history of seizures.

Likelihood Possible Evidence D
Black Currant seed Oil full monograph & interactions
The maker

Brand information

Manufacturer and brand details for GLA 90 Black Currant Oil, from the product label.

Genestra Brands

Name
Seroyal USA
City
Pittsburgh
State
PA
ZipCode
15275
Phone Number
1-888-737-6925
Web Address
seroyal.com
Pharmacist Counseling Corner

GLA 90 Black Currant Oil by Genestra Brands: Common Questions

Does GLA 90 Black Currant Oil by Genestra Brands interact with any medications?
Yes. Based on its ingredients, GLA 90 Black Currant Oil has a known interaction with 226 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
GLA 90 Black Currant Oil contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Will this help my cholesterol or heart health?
The oleic acid in this product is rated possibly effective for high cholesterol and coronary heart disease, based on preliminary evidence. That's a cautious positive, not a guarantee — and we don't have effectiveness data for the other fatty acids in the blend.
Is this safe to take if I'm pregnant or breastfeeding?
Oleic acid in food amounts is considered safe, but concentrated supplement doses haven't been well studied in pregnancy or during breastfeeding. You'll want to talk with your doctor or pharmacist before taking it — there isn't enough data to know either way.
What's inside, exactly?
Five active fatty acids: gamma-linolenic acid, linoleic acid, oleic acid, alpha-linolenic acid, and stearidonic acid — all from black currant seed oil. The capsule itself contains gelatin, glycerin, and water.
Can I take this with my diabetes medication?
The oleic acid in this product may boost how well your diabetes drugs work, which could lower your blood sugar more than expected. Check with your doctor or pharmacist before starting it.
Are there any side effects?
We don't have adverse effects listed in our data for the oleic acid we could assess. Keep in mind we couldn't check the other fatty acids in the formula — run your specific situation past your pharmacist if you're concerned.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Not sure if GLA 90 Black Currant Oil is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

GLA 90 Black Currant Oil label
Go deeper

The Full Monographs Behind GLA 90 Black Currant Oil’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Black Currant

Interacts with 140 drugs

Black currant is a nutritious berry that is rich in vitamin C and antioxidants, and its seed oil contains the omega-6 fatty acid GLA. While it is enjoyed safely as a food and is popular as a...

Read the full Black Currant monograph → Herb & supplement monograph

Oleic Acid

Interacts with 86 drugs

Oleic acid is a heart-healthy monounsaturated fat found mainly in olive oil, canola oil, avocados, and nuts. As part of a Mediterranean-style diet, it is widely viewed as a healthier replace...

Read the full Oleic Acid monograph →
Sources

Sources & How We Checked

GLA 90 Black Currant Oil's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 7 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Oleic Acid 1 reference
  1. Madigan C, Ryan M, Owens D, et al. Dietary unsaturated fatty acids in type 2 diabetes: higher levels of postprandial lipoprotein on a linoleic acid-rich sunflower oil diet compared with an oleic acid-rich olive oil diet. Diabetes Care 2000;23:1472-7. PubMed

See these in context on the Oleic Acid monograph →

Black Currant 6 references
  1. Guivernau M, Meza N, Barja P, Roman O. Clinical and experimental study on the long-term effect of dietary gamma-linolenic acid on plasma lipids, platelet aggregation, thromboxane formation, and prostacyclin production. Prostaglandins Leukot Essent Fatty A PubMed
  2. Fa-lin Z, Zhen-yu W, Yan H, et al. Efficacy of blackcurrant oil soft capsule, a Chinese herbal drug, in hyperlipidemia treatment. Phytother Res 2010;24 Suppl 2:S209-13. PubMed
  3. Holman CP and Bell AF. A trial of evening primrose oil in the treatment of chronic schizophrenia. J Orhtomolecular Psych 1983;12:302-304.
  4. Vaddadi KS. The use of gamma-linolenic acid and linoleic acid to differentiate between temporal lobe epilepsy and schizophrenia. Prostaglandins Med 1981;6(4):375-379. PubMed
  5. Norred, C. L. and Brinker, F. Potential coagulation effects of preoperative complementary and alternative medicines. Alt Ther 2001;7(6):58-67.
  6. Puri BK. The safety of evening primrose oil in epilepsy. Prostaglandins Leukotrienes Essential Fatty Acids 2007;77:101-3. PubMed

See these in context on the Black Currant monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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