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Borage (Borago officinalis) is a bristly annual herb famous for brilliant blue star-shaped flowers and a cucumber-like flavor. It has a long European food and herbal history, but modern safety discussion must include its naturally occurring pyrrolizidine alkaloids (PAs). Borage leaf, flower, seed, and refined seed oil are not interchangeable.
Materia Medica
- Botanical name: Borago officinalis L.
- Family: Boraginaceae
- Common names: borage, starflower
- Plant type: annual herb that readily self-seeds
- Leaves: coarse, hairy, gray-green to green, with a cucumber-like scent when crushed
- Flowers: five-pointed blue stars, sometimes pink or white, with a dark central cone of anthers
- Traditional parts: leaves and flowers; seeds are pressed for borage oil
Accepted botanical name: Borago officinalis L.
Family: Boraginaceae
Common names: Borage, Starflower, Bee Bread
Parts used historically: young leaves and flowers in European food/tea, seeds as the source of borage seed oil
Growth habit: bristly, fast-growing annual
Native region: Mediterranean and adjacent western Asia; widely cultivated and naturalized.
Primary traditions: European culinary and herbal traditions, pollinator gardening, historical courage lore.
Actions & Energetics
Traditional herbal actions: historical leaf and flowering-herb infusion described as cooling, demulcent, mildly diuretic, diaphoretic and mood-lifting. These records predate current understanding of naturally occurring pyrrolizidine alkaloids. Energetics: traditionally cooling, slightly moistening and gentle in older folk-herbal terminology; a cucumber-like taste and the unusually bright flowers gave it a welcome summer garden reputation. Refined seed oil is a separate lipid preparation.
Botanical Description
Borage forms a sprawling to upright plant covered in stiff hairs. The rough leaves and vivid star-shaped flowers make mature plants distinctive. Young seedlings are less obvious, so use the whole plant and known seed source for confident identification.
The family Boraginaceae includes many species that may contain pyrrolizidine alkaloids. Common-family membership alone does not tell you the exact PA content of a particular preparation, but it is a reason to take botanical identity and product quality seriously.
Borago officinalis is a coarse annual with bristly stems and rough, broadly oval to lance-shaped leaves. Its flowers have five striking sharply pointed blue petals, sometimes changing pinkish with age, arranged around a cone of dark anthers. Drooping flower clusters and hairy buds are typical. Plants grow rapidly, attract bees, produce hard nutlet-like seeds and readily reseed in disturbed garden ground.
Name Confusion & Look-Alikes
Borage (Borago officinalis) is distinct from comfrey (Symphytum officinale), viper's bugloss (Echium vulgare) and other Boraginaceae. Many relatives contain pyrrolizidine alkaloids but are not interchangeable herbal or food plants. The genus Borago also contains other species. Confirm the bristly leaves, nodding five-pointed blue flowers, dark stamens and annual habit before harvesting. Seed oil is not the same material as crushed borage seed or leaf tea.
Traditional Indications
European folk herbalism described borage as cooling, uplifting, soothing, and supportive during feverish or respiratory complaints. It also acquired a strong reputation for courage and good spirits. These traditional descriptions belong to historical practice and should not be presented as proof that borage treats fever, depression, lung disease, or adrenal problems.
Borage has a genuine food history. Young leaves and flowers have been used in soups, salads, drinks, garnishes, and regional European dishes. The flowers are especially popular as edible decoration because of their color and mild flavor.
Historical food use does not erase modern toxicology concerns. Exposure depends on plant part, serving size, frequency, chemistry, and regulatory limits. “People have eaten it for centuries” is useful context, not a complete safety assessment.
The historical accounts of borage as a tea or fresh green should be presented alongside evidence of toxic PAs in leaves, flowers and microgreens. Modern laboratory analysis found PA contents can vary by growing conditions and maturity and may be especially high in flowers; an old food recipe does not prove every harvest is safe for repeated medicinal use.
Preparations & Dosage
Modern material distinction: do not treat wild leaves and flowers as interchangeable with laboratory-tested PA-free borage seed oil. Historical internal leaf infusion does not have an established universally safe daily medicinal dose. The recipes below focus on verified seed oil or non-ingestible plant crafts.
Recipe 1 — Cold Borage Seed Oil Salad Dressing
Ingredients: 1 teaspoon verified food-grade, certified PA-free borage seed oil, 2 tablespoons olive oil, 1 tablespoon lemon juice or food vinegar, and herbs or salt as desired. Method: whisk together just before serving. Keep refrigerated and use promptly. This uses a commercially tested edible oil in a food recipe, not homemade leaf or flower extract. Avoid prolonged high-heat cooking with delicate polyunsaturated seed oils.
Recipe 2 — Borage Seed Oil Hand Balm
Ingredients: 20 g certified PA-free borage seed oil, 20 g olive oil and 5 g clean beeswax. Method: gently melt wax with the olive oil over a water bath, remove from heat, then stir in borage seed oil. Pour into a clean tin and cool. Use a small amount on intact skin; patch test for irritation. This is a basic balm, not a sterile medicinal wound product.
Recipe 3 — Dried Starflower Sachet, Non-ingestible
Ingredients: approximately 10 fresh correctly identified borage blossoms, clean absorbent paper and a small dry cotton pouch. Method: spread blossoms on paper with good airflow and dry until fully crisp, then place inside the pouch for decorative seasonal display. Label clearly “Borage — not for eating.” Keep away from small children and pets.
Recipe 4 — Pressed Borage Botanical Card
Materials: freshly cut identified borage leaf and one intact star-shaped flower, absorbent paper and a heavy book or plant press. Method: blot and arrange the specimen between sheets of paper, press flat for 1–2 weeks, changing damp paper, then mount it in a labeled botanical card under a protective transparent sleeve. Record Borago officinalis, locality and date. This is botanical education and craft, not a remedy.
Recipe 5 — Borage Compost Greens for the Garden
Ingredients: one bucket cut pesticide-free borage foliage (before seed maturity), and an approximately equal volume of shredded dry leaves or straw. Method: chop foliage into short pieces, layer with dry materials in an established compost heap, maintain appropriate aeration and moisture, turn periodically and mature fully before use as garden compost. This is a homesteading plant-use recipe, not a preparation for human or animal feeding.
Historical Leaf Infusion — Recorded but Not a Routine Home Dose
Older European herbals described several fresh leaves or dried leaf material steeped in hot water and sometimes combined with wine or other herbs. Contemporary data on unsaturated PAs prevent deriving a reliable safe daily internal amount from such historical reports. The presence of traditional use is documented; a medicinal tea dosage is not recommended here.
Seed Oil, GLA Studies and Children
Research oils are identified by GLA content and product composition; clinical doses in eczema or other investigations vary and do not establish benefits for all marketed products. There is no universal pediatric medicinal dose of borage seed oil or leaf extracts and no warrant to transfer historical leaf doses to children.
Classical Formulations
Older Mediterranean and British herbals mention borage wine, tea, cooked leafy greens and floral garnishes. These are authentic historical preparation categories but the modern PA toxicology record changes how they should be evaluated. There is no single validated classical Ayurvedic ghrita formula for Borago officinalis to reconstruct. The seed-oil balm recipe above is a present-day external household form.
Constituents
Leaves and flowers: various phenolic and mucilaginous constituents together with unsaturated pyrrolizidine alkaloids including reported lycopsamine, intermedine, amabiline and related compounds. Seeds: oil rich in linoleic acid and gamma-linolenic acid (GLA). Refined seed oil that has been certified PA-free is a different commercial material from untested cold extracts of aerial parts. The exact chemical amounts vary with plant tissue and maturation.
Modern Research
Borage seeds are pressed to make an oil rich in gamma-linolenic acid (GLA). Clinical research on borage seed oil is therefore not evidence for borage leaf tea, and research on leaf chemistry does not automatically describe a purified oil.
Quality matters. Reputable borage-oil products should be manufactured to control or remove pyrrolizidine alkaloids. A label that says “borage oil” does not by itself reveal the quality of the purification process.
Research on borage often focuses on seed oil because of its GLA content. Studies of GLA-containing oils have explored inflammatory conditions, but results depend on the exact oil, dose, comparator, and condition. Even when a seed-oil study is promising, it should not be rewritten as proof for drinking borage-leaf tea.
Laboratory research has also identified phenolic compounds and other constituents in aerial parts. Human evidence for many popular claims remains limited.
Recent food-chemistry research has quantified alkaloid levels in borage leaves, microgreens and blossoms under different growing conditions, underscoring the danger of assuming flowers are uniformly free of PAs. Trials of refined borage seed oil for eczema and related conditions have produced mixed findings; review conclusions do not establish dependable clinical effectiveness for every product.
Adverse Effects
Borage can contain unsaturated pyrrolizidine alkaloids. This class of compounds is a recognized safety concern because certain PAs can damage the liver and are considered genotoxic and carcinogenic. European regulators have established risk-management guidance and maximum levels for PAs in various herbal and food products.
PA content can vary between plant material and products. Home drying, steeping, or cooking should not be assumed to eliminate the compounds. For regular medicinal use, the safest approach is to use products that have been appropriately tested and controlled for PA content rather than relying on unidentified or untested material.
Unsaturated pyrrolizidine alkaloids can damage the liver and may be carcinogenic; risk depends on cumulative exposure and the particular chemicals present. Testing and manufacturing matter for borage seed oil. Concentrated topical and oral products may also produce individual irritation or digestive intolerance.
Interactions & Contraindications
Historical practice includes external borage preparations, but PA safety should still be considered. Avoid using unstandardized PA-containing preparations on broken or extensively damaged skin where absorption may be greater. Stop use if irritation develops.
Human medicinal interaction data for borage herbal products are limited. Potential laboratory or theoretical interactions should not be presented as established clinical drug interactions. Avoid products that contain unquantified toxic unsaturated PAs, and do not infer the same safety record for leaf tea as for certified PA-free refined oil.
Pregnancy & Breastfeeding
Because of PA concerns and insufficient safety data, medicinal internal use of borage leaf or flower should be avoided during pregnancy and breastfeeding and should not be casually given to children. People with liver disease should also avoid self-prescribing PA-containing botanicals.
Anyone using multiple herbs, supplements, or medications that affect the liver should discuss borage products with a qualified clinician or pharmacist.
Because of the PA toxicology record and limited reproductive safety data, medicinal intake of unverified borage aerial parts or extracts is not suitable during pregnancy and breastfeeding. LactMed identifies the hazard and emphasizes PA-free certification for commercial seed oil.
Habitat & Cultivation
Borage is easy to grow from seed in full sun to light shade and ordinary well-drained soil. It develops a taproot and is usually direct-sown. Plants can become large and untidy but are valuable pollinator plants, especially for bees.
Allow a few flowers to set seed and borage often returns on its own the following year. Deadheading reduces self-seeding if you want more control.
Native origins: Mediterranean basin and nearby west Asian regions, now naturalized widely. Hardiness: primarily an annual that may be grown seasonally across many U.S. zones, rather than a long-lived frost-hardy perennial. Sun: full sun to light shade. Soil: moderately fertile, well-drained garden soil. Growth: a fast-growing pollinator herb that may reseed very freely. Its flowering habit makes it useful in pollinator borders and companion gardens.
Propagation
Sow seed directly into prepared soil after frost danger or in suitable cool spring conditions, as young seedlings develop a taproot and dislike rough transplanting. Thin to give spreading bristly plants sufficient room. Allow selected plants to seed for future years, or remove flowers before seed sets to control unwanted volunteers. Label seedlings carefully because nearby hairy Boraginaceae plants may be mistaken for borage.
Harvesting & Drying
Harvest flowers when fully open and young leaves before they become especially coarse. Wear gloves if the bristly hairs irritate your skin. Dry small amounts quickly in shade with strong airflow. Store fully dried material in labeled airtight containers away from heat and moisture.
For medicinal products, visual quality is not enough; PA testing is a chemical quality issue that cannot be judged by appearance.
Choose clean unsprayed plants and retain blossoms for bees. Aerial-part gathering for craft differs from collecting seed to produce chemically tested oil; there is no simple home-extraction procedure that certifies borage seed oil PA-free. Dry decorative material with good airflow and label clearly.
Food Use
Where borage is legally sold and traditionally eaten as food, occasional culinary use is different from daily medicinal dosing. Use correctly identified material from a reliable source, favor modest food quantities, and pay attention to local food-safety guidance. People in higher-risk groups should avoid using historical food tradition as a reason to ignore PA warnings.
The traditional culinary record includes flowers in drinks and desserts and tender leaves in some cooked Mediterranean dishes. The modern toxicology and food-regulatory literature requires more care than repeating “edible flower” without discussing PAs. A tested food-grade, PA-free seed oil and an untested fresh flower are not chemically interchangeable.
History, Folklore & Spiritual Use
Borage has long been linked with courage and cheerfulness in European herb lore. Medieval and early-modern writers repeated the idea that borage could “gladden the heart,” and the plant appeared in drinks and garden traditions associated with bravery before difficult events.
Those sayings are culturally meaningful but should not be converted into claims that borage is an antidepressant.
Modern folk-magic commonly associates borage with courage, confidence, joy, truthfulness, and emotional resilience. Its star-shaped flowers make it visually suited to altar work, sachets, pressed-flower pages, or intention bowls. Non-ingestible symbolic practice avoids turning folklore into a reason for unnecessary PA exposure.
Courage and the “gladness” motto: a much-repeated botanical motto, Ego borago gaudia semper ago (“I, borage, always bring joy”), and later folk stories connect the plant with courage, cheerfulness and the strengthening of heart and spirit. The saying is often attributed to antiquity, but attribution to a particular classical author varies across popular herbals. The flower's vivid five-pointed shape contributed to the English name starflower.
Nepenthe legend: some later writers speculated that borage belonged among the herbs imagined in Homeric accounts of nepenthe, the forgetfulness-bringing drink in the Odyssey. That is literary conjecture, not a verified ancient botanical recipe.
Materia Medica Summary
Food history shows that borage has long been eaten. Traditional herbal use records older medicinal beliefs. Modern toxicology requires attention to pyrrolizidine alkaloids. Seed oil research is not the same as leaf or flower research. Folklore and spiritual practice concern symbolism, not clinical proof.
Educational disclaimer: This article is for educational and historical information only and is not intended to diagnose, treat, cure, or prevent disease. Avoid medicinal internal use during pregnancy, breastfeeding, childhood, or liver disease, and use only appropriately sourced and tested products when PA exposure is relevant.
Return to the Roosters Peacock Herbs & Botanicals Guide
Borage (Borago officinalis) is a bristly, blue-star-flowered Mediterranean annual valued by pollinators and famous in European historical food and courage lore. Older herbal uses of aerial parts must be separated from modern evidence of toxic pyrrolizidine alkaloids. Commercial refined seed oil can contain GLA and should be verified PA-free; it is not equivalent to home-prepared tea from leaves or flowers. Modern home recipes here emphasize verified seed oil and non-ingestible botanical craft.