Plantopedia

Borage

Borage — health benefits and uses

Traditional European herb used for cooling and skin support.

Meta Description: Discover borage herb benefits, uses, and side effects — from cucumber-flavored leaves and star-shaped blue flowers in salads and drinks to borage seed oil GLA research. Includes nutrition facts, pyrrolizidine alkaloid safety guidance, and who should avoid it.

Vitamin C
35 mg
Vitamin A (provitamin carotenoids)
350 mcg RAE
Iron
3.3 mg
Potassium
470 mg
Calcium
80 mg

% Daily Value based on 2,000 cal diet

Key active compounds

  • Gamma-linolenic acid (GLA): An omega-6 polyunsaturated fatty acid (a type of healthy fat the body cannot make in large amounts on its own) concentrated in borage seed oil. Acts as a building block for anti-inflammatory signaling molecules called eicosanoids. Clinical trials using GLA from borage oil have shown modest improvements in rheumatoid arthritis symptoms and blood lipid profiles.
  • Pyrrolizidine alkaloids (PAs) — lycopsamine, intermedine, amabiline, supinine, thesinine: A class of naturally occurring plant compounds found mainly in borage leaves, stems, and roots, with lower levels in flowers and seeds. Unsaturated PAs are potentially hepatotoxic (liver-damaging) and possibly carcinogenic at high or chronic exposures. Their presence is the primary safety concern with borage leaf use.
  • Flavonoids and phenolic acids: Polyphenolic compounds (plant-based antioxidants) naturally present in the leaves. Associated with antioxidant and mild anti-inflammatory activity in lab studies; human evidence is preliminary.
  • Mucilage and soluble fibers: Viscous polysaccharides (gel-like carbohydrates) in the soft leaf tissue. May have mild soothing effects on mucous membranes and contribute to gut comfort, though no clinical trials have confirmed this in borage specifically.

Prep and pairing ideas

With what it grows alongside: Borage self-seeds prolifically and is a natural companion to strawberries in the garden — and on the plate. A few borage flowers scattered over a strawberry salad with balsamic and mint is a classic combination that plays the cucumber-sweetness contrast beautifully.

In summer drinks: Float three or four borage flowers in a glass of sparkling water with cucumber slices and a sprig of mint. The flowers hold their color for about 20–30 minutes before wilting, so add them just before serving. For a more dramatic presentation, freeze single flowers into ice cubes.

In grain and pasta dishes: Young borage leaves, roughly chopped, can replace spinach in ricotta-stuffed pasta or be stirred into a farro salad with roasted tomatoes and olives. The heat mellows the mild prickliness of the leaf surface.

Who benefits most from borage in a culinary context?

The adventurous plant-based cook: If you grow your own herbs or have access to a farmer's market that carries specialty greens, borage gives you a unique flavor profile (that cucumber freshness) and unmatched visual appeal at no cost to your WFPB goals.

  • Adds variety to herb-forward salads without relying on the same basil-parsley-dill rotation
  • Edible flowers reduce the need for processed garnishes or added sugars in drinks and desserts
  • Grows easily and abundantly, making it accessible for home growers

The person managing joint inflammation (with medical guidance): If you have rheumatoid arthritis and are exploring adjunct approaches alongside your prescribed treatment:

  • Borage seed oil (PA-free, GLA-standardized) has modest trial evidence for symptom improvement
  • May allow some people to reduce NSAID use, though this should always be supervised by a clinician
  • Worth discussing with a rheumatologist as part of an integrative care plan

Bottom line

Borage is a genuinely useful and beautiful culinary herb when used in its natural role: as an occasional edible flower and fresh-leaf garnish that brings cucumber flavor and visual drama to food and drink. At culinary amounts, it contributes meaningful nutrients and fits comfortably in a whole-food, plant-based diet.

The deeper functional story belongs to borage seed oil, which has modest but real human trial evidence for rheumatoid arthritis symptom relief and modest lipid benefits — provided the oil is PA-free and used under medical supervision.

The limits matter here too: pyrrolizidine alkaloids make daily leaf use inadvisable, borage tea is best avoided, clinical evidence for eczema is negative, and several populations (pregnant people, those with liver disease, people on blood thinners) should steer clear or consult a doctor first. Use borage for what it does well — bring a plate to life — and seek professional guidance before reaching for the seed oil.

Antioxidant
Anti-Inflammatory
Skin Health
Heart Health
Digestive Health
Detox
Blood Sugar
Immune Support
Weight Management
Energy
Brain Health

PA safety rule #1: Never use borage leaves medicinally or in large daily quantities. Pyrrolizidine alkaloids accumulate with repeated exposure and can cause hepatic veno-occlusive disease (a serious condition where small blood vessels in the liver become blocked).

PA safety rule #2: If using borage seed oil as a supplement, choose products that are certified PA-free or PA-reduced. Not all commercial oils have been tested.

Pregnancy: Avoid all internal use of borage herb and non-verified borage oils. PAs are potentially teratogenic (capable of harming fetal development), and safety data during pregnancy are absent.

Breastfeeding: Also avoid internal borage herb; PAs may transfer to breast milk.

Children and adolescents: More vulnerable to hepatotoxicity (liver damage); internal medicinal use of borage herb is not appropriate and seed oil should only be used under specialist supervision.

Liver disease or elevated liver enzymes: The additive hepatotoxic risk from PAs makes borage herb unsafe for this group.

Blood thinners (warfarin, DOACs, aspirin, clopidogrel): Borage oil's effects on prostaglandins and platelet function may increase bleeding risk or interfere with INR (a clotting test used to monitor warfarin).

Epilepsy or seizure history: High-dose GLA has been linked to seizures in case reports; caution or avoidance is advised.

Other PA-containing herbs (comfrey, coltsfoot): Using these alongside borage increases cumulative PA exposure. Avoid combining them.

Hepatotoxic medications (methotrexate, isoniazid, certain chemotherapy agents): Combined liver stress from PAs and these drugs is a real risk.

  • Adds variety to herb-forward salads without relying on the same basil-parsley-dill rotation
  • Edible flowers reduce the need for processed garnishes or added sugars in drinks and desserts
  • Grows easily and abundantly, making it accessible for home growers
  • Borage seed oil (PA-free, GLA-standardized) has modest trial evidence for symptom improvement
  • May allow some people to reduce NSAID use, though this should always be supervised by a clinician
  • Worth discussing with a rheumatologist as part of an integrative care plan

What the evidence supports
  • Clearly separates culinary borage (leaves/flowers) from borage seed oil, and explains why most research focuses on the oil’s GLA content.
  • Accurately highlights pyrrolizidine alkaloids (PAs) as the key safety issue and frames borage as an occasional garnish rather than a daily green.
  • Fair summary of human data: modest symptom relief for rheumatoid arthritis with PA-free, GLA-standardized seed oil; little to no benefit for eczema.
  • Notes realistic nutrition contributions (vitamin C, iron, potassium) at typical culinary portions within a plant-forward diet.
Where evidence is developing
  • Cardiometabolic findings (lipids, HDL/triglycerides) come from small, short trials; there are no studies showing reductions in events like heart attacks or strokes.
  • Digestive claims are largely traditional or preclinical; controlled human studies are lacking.
  • Skin outcomes remain mixed: topical or oral borage oil has not consistently improved atopic dermatitis in trials.
  • Real-world PA exposure from leaves varies by plant part, preparation, and sourcing; standardized testing of commercial products is inconsistent.
Things to keep in mind
  • Culinary use: keep portions small (about a small handful of young leaves or a few flowers) and occasional; avoid medicinal-strength teas made from leaves due to PA load.
  • Supplements: clinical trials used roughly 1–3 g/day of GLA (often 1–6 g borage oil, depending on concentration) for 6–24 weeks—only with PA-free/PA-reduced products and clinician oversight.
  • Who should avoid or seek medical advice first: pregnant or breastfeeding individuals, children/adolescents, anyone with liver disease or elevated liver enzymes, people on blood thinners, those with seizure history, and those taking hepatotoxic medications.
  • Expectations: culinary borage will not deliver the GLA doses studied in supplements; even with seed oil, benefits are modest and should not replace prescribed care for rheumatoid arthritis or eczema.

Contains trace pyrrolizidine alkaloids; use leaves occasionally, not daily.

  1. USDA FoodData Central — Borage, raw (nutrition data): (fdc.nal.usda.gov)
  2. Pyrrolizidine alkaloids in borage — PubMed review (2023): (pubmed.ncbi.nlm.nih.gov)
  3. Borage monograph — Drugs.com (safety, interactions, dosage overview): (drugs.com)
  4. Memorial Sloan Kettering Cancer Center integrative medicine — Borage clinical evidence summary: (mskcc.org)
  5. Systematic review of adverse events for PA-containing herbs including borage (PubMed 2021): (pubmed.ncbi.nlm.nih.gov)
  6. Human trial: Fish and borage/echium oil for metabolic syndrome biomarkers — NutraIngredients (2015): (nutraingredients.com)
  7. Human trial: Borage oil in overweight young adults — lipid outcomes (PubMed 2021): (pubmed.ncbi.nlm.nih.gov)
  8. Mediterranean wild greens review including borage — cancer prevention and antigenotoxic properties (PMC): (pmc.ncbi.nlm.nih.gov)
  9. Borage phytochemistry and pharmacology — The Pharma Journal (2022): (thepharmajournal.com)
  10. Borage bioactive compounds and safety review — ScienceDirect: (sciencedirect.com)
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