Evening Primrose Oil (GLA): Skin & Uses Explained

The evening primrose opens its yellow flowers only at dusk – a small botanical spectacle that gave the plant its name. From its tiny seeds an oil is pressed that has held a firm place in natural cosmetics for decades. The reason is a rare fatty acid that occurs in scarcely any other edible oil in a noteworthy amount.

In short: evening primrose oil is cold-pressed from the seeds of Oenothera biennis and is one of the few natural sources of gamma-linolenic acid (GLA), a special omega-6 fatty acid. It is used internally as a capsule and externally as a skin oil. No health claims are approved in the EU for evening primrose oil or GLA – we describe it honestly as a high-quality plant oil with a special fatty-acid profile.

The key points at a glance

• Evening primrose oil is obtained from the seeds of the evening primrose by cold pressing.
• Its hallmark is gamma-linolenic acid (GLA), an omega-6 fatty acid that is rare in foods.
• Used internally (softgel capsules) and externally (skin oil, natural cosmetics).
• Unsaturated oils are prone to oxidation – freshness and gentle processing are decisive.
• Honestly: no approved health-related claims – we stay neutral.

What is evening primrose oil and what is GLA?

The evening primrose is a biennial plant with strikingly yellow flowers, originally from North America and today also widespread in Europe. Its small seeds contain a fatty oil that is gently cold-pressed.

The star of the oil is GLA (gamma-linolenic acid), a polyunsaturated omega-6 fatty acid. What makes it special: while the parent omega-6 fatty acid, linoleic acid, is found in almost all plant oils, GLA occurs in a relevant amount in only a few oils – besides evening primrose oil, mainly in borage and hemp oil. In the body's fatty-acid metabolism, GLA is an intermediate on the way to further signalling substances. This biochemical position is textbook knowledge; we do not derive a promise of efficacy from it.

Why evening primrose oil is so often linked with “skin”

Evening primrose oil is a classic in natural cosmetics. As a skin oil it is valued for its fatty-acid profile and is found in countless creams and serums. People traditionally use it as part of their skincare routine – especially at times when the skin needs a little attention, such as in the dry, heated air of winter (see Nutrients for the skin in winter).

Evening primrose oil also comes up in guides around women's topics and the menopause. We describe these contexts of use – that is, what people do – without deriving any health effect from them. For persistent skin complaints, a medical check-up is advisable.

Omega-6, omega-3 and the ratio

GLA belongs to the family of omega-6 fatty acids. In nutrition discussions, the ratio of omega-6 to omega-3 often comes up, because the modern Western diet tends to be rich in omega-6 and poorer in omega-3. That does not make evening primrose oil “bad” – GLA is a special omega-6 fatty acid with its own metabolic pathway. But it does explain why many people deliberately place evening primrose oil alongside a good source of omega-3.

If this interplay interests you, it's worth a look at our guides Omega-3: who it makes sense for and Covering omega-3 on a vegan diet with algae oil. This gives a rounded picture of your fatty-acid intake instead of an isolated focus on a single oil.

What research is investigating

Gamma-linolenic acid is scientifically interesting because it is rare in the diet and occupies a defined position in fatty-acid metabolism. Among other things, research is investigating the role of GLA in metabolism and in connection with the skin barrier. That the skin depends on an intact lipid layer is well-documented physiology.

Much surrounding GLA, however, is the subject of ongoing scientific debate; robust, generally accepted everyday statements are still lacking. We deliberately report this in general terms here, without specific figures – and we do not derive any promise of efficacy from it.

Forms, quality and use

Because unsaturated oils react with air and light (they oxidise), the rules for quality are: gentle cold pressing, dark packaging, cool storage away from light, a clear production and best-before date, and laboratory testing. Rancid oil smells unpleasant – in that case, stop using it.

GLA sources compared: evening primrose, borage and hemp

Evening primrose oil is the best known, but not the only, natural source of GLA. A comparison helps with the choice:

Which oil suits you depends on your goal: anyone looking for a mild skin oil or a pre-measured capsule often reaches for evening primrose oil, while borage oil is the more GLA-rich alternative. How plant and animal oils differ in general is explained in the guide Linseed oil vs. fish oil.

Internal and external use: what to look out for

For internal use, softgel capsules are practical because they protect the sensitive oil from light and air and are neutral in taste. For external use as a skin oil, the rule is: apply sparingly to cleansed skin and pat in gently – a few drops are usually enough. For sensitive skin, a small test on the inner elbow beforehand is advisable.

For skincare from the inside and outside, the guide Nutrients for the skin in winter is a good fit, and if you'd like to look at beauty nutrients such as biotin and zinc, you'll find context in the guide Skin, hair, nails: biotin, zinc, selenium. One principle remains: a single oil does not “make” beautiful skin – diet, moisture, sleep and sun protection all work together.

Evening primrose oil in natural cosmetics: why it is so popular

Scarcely any plant oil has established itself as firmly in natural cosmetics as evening primrose oil. The reason lies in its fatty-acid profile: oils with a high proportion of unsaturated fatty acids are regarded as “rich” and are readily used in care products for demanding skin. The skin itself depends on an intact lipid layer – that is well-documented physiology and the reason why oils play any role at all in skincare. Evening primrose oil fits in here as a traditional, mild representative.

In practice, you'll come across evening primrose oil in creams, serums, balms and as a pure facial oil. Many people value it because it smells mild and spreads pleasantly on the skin. One thing remains important: a single oil is always just one building block of a good skincare and nutrition routine – moisture, sleep, a balanced diet and sun protection play at least as big a part. If you'd like to look at the topic of skin holistically, the guide Nutrients for the skin in winter gives a good overview.

Who is evening primrose oil interesting for?

Evening primrose oil appeals above all to people who value plant-based, natural skincare and are looking for a mild oil with a special fatty-acid profile. Anyone who wants to shape their own fatty-acid intake consciously, and in doing so considers the rarer omega-6 fatty acids, quickly comes across GLA. For this audience, evening primrose oil – as a mild, well-tolerated standard source of GLA – is often the starting point.

Evening primrose oil is less of a focus for people who primarily want to improve their omega-3 supply: for that, algae, linseed or fish oil are the more suitable sources (see Covering omega-3 on a vegan diet with algae oil). For persistent skin complaints, no oil replaces a medical check-up – here, a visit to the dermatologist is the more sensible route.

An honest assessment: what is established and what is not

Established is that evening primrose oil is one of the few natural sources of GLA, and the role of GLA in fatty-acid metabolism is known. Open, or not recognised as a claim, are concrete health statements. Evening primrose oil is a high-quality plant oil with a special fatty-acid profile – not a remedy and not a substitute for medical advice. As part of a conscious skin and oil routine, it nonetheless has its firm place.

Matching products from Scheunengut

For skin and connective tissue, you'll find our category Beauty – Skin, Hair & Nails as well as products for Women in every stage of life. For a comparison of plant oils, the guide Linseed oil vs. fish oil is a good fit; for beauty from within, the guides Skin, hair, nails and Nutrients for the skin in winter. Further reading: Omega-3: who it makes sense for and Supporting the menopause naturally.

Frequently asked questions (FAQ)

What is GLA in evening primrose oil?

GLA (gamma-linolenic acid) is a polyunsaturated omega-6 fatty acid that occurs only rarely in foods. Evening primrose oil is one of the few natural sources; in the body, GLA is an intermediate in fatty-acid metabolism.

Is evening primrose oil taken internally or externally?

Both are common: internally as a taste-neutral softgel capsule that protects the sensitive oil from light and air, and externally as a skin oil, applied sparingly to cleansed skin. For sensitive skin, test on the inner elbow beforehand.

Evening primrose oil or borage oil – which is better?

Both provide GLA. Borage oil usually has the higher GLA content and is stronger, while evening primrose oil is milder and the classic choice in natural cosmetics. Which one suits you depends on taste and use – for both, freshness and gentle processing are what count.

How do I recognise fresh, high-quality evening primrose oil?

Look out for gentle cold pressing, dark packaging, cool storage away from light, a clear best-before date and laboratory testing. Rancid oil smells unpleasant – in that case you should stop using it.