Evening primrose oil is a supplement made from the seeds of a plant called Oenothera biennis. It is one of the most popular women's health supplements in Nigeria and around the world. But most people who buy it do not fully understand what is actually in it or what makes it work.
The answer comes down to one compound: GLA.
This guide explains what evening primrose oil is, where it comes from, what GLA is, and why your body needs it.
For the full picture of what evening primrose oil does and how to use it in Nigeria, read: Evening Primrose Oil in Nigeria: What It Is, What It Does, How to Take It and What It Costs
Where Does Evening Primrose Oil Come From?
The Oenothera biennis plant is a wildflower that grows mainly in North America and parts of Europe. Its flowers open in the evening, which is where it gets its name. The plant is not native to Nigeria, but its oil is widely available here as an imported supplement.
The oil is extracted from the seeds of the plant, not the petals or leaves. Cold pressing is the best extraction method, because it preserves the fatty acid content without using heat or solvents. Heat damages the oil and reduces its effectiveness.
When you buy an evening primrose oil supplement, you are buying a soft gel capsule filled with this seed oil.
What Is GLA?
GLA stands for gamma-linolenic acid. It is a type of omega-6 fatty acid.
You are probably familiar with omega-3 fatty acids from fish oil. Omega-6 fatty acids are a different group. Both are essential fats, meaning the body cannot make them from scratch. You have to get them from food or supplements.
Most omega-6 fats in the Nigerian diet come from linoleic acid, found in vegetable oils, groundnuts, and seeds. The body can convert linoleic acid into GLA, but this conversion is often slow and inefficient. Stress, illness, age, poor diet, and excess alcohol all make the conversion even slower.
Many people have chronically low GLA levels without knowing it. Evening primrose oil provides GLA directly, bypassing the conversion problem entirely.
What Does the Body Do with GLA?
Once GLA enters the body, it is converted into a compound called DGLA, or dihomo-gamma-linolenic acid. DGLA is then converted into a family of hormone-like substances called prostaglandins, specifically prostaglandin E1, or PGE1.
PGE1 has several important roles in the body:
It reduces inflammation, particularly the kind of chronic low-grade inflammation linked to hormonal imbalance, skin conditions, and joint pain.
It supports the production and regulation of hormones, including those involved in the menstrual cycle.
It helps maintain the skin's outer layer, called the stratum corneum, by supporting the fats that hold skin cells together and prevent moisture loss.
This is why evening primrose oil has benefits across such a wide range of health conditions. GLA's conversion into PGE1 touches multiple systems in the body.
How Much GLA Is in Evening Primrose Oil?
Evening primrose oil contains between 8% and 10% GLA by weight. This makes it one of the richest plant-based sources of GLA available.
For comparison:
Borage oil contains 20% to 26% GLA. It has a higher GLA concentration but is more expensive, less studied, and has some safety concerns around liver toxicity with long-term use.
Blackcurrant seed oil contains around 15% GLA. It is less commonly available in Nigeria.
Evening primrose oil is the most widely researched GLA supplement and has the longest safety record. It is the standard clinical choice for GLA supplementation.
How to Know How Much GLA Is in Your Supplement
The label should state the GLA content clearly. A 1,000mg capsule with 10% GLA contains 100mg of GLA per dose. A good label will say: "1,000mg Evening Primrose Oil, providing GLA 100mg."
If the label does not show GLA content, you cannot evaluate the product. Always check for this figure before buying.
Is Evening Primrose Oil the Same as Fish Oil?
No. Fish oil and evening primrose oil are very different.
Fish oil contains omega-3 fatty acids, specifically EPA and DHA. These support heart health, brain function, and reduce triglycerides.
Evening primrose oil contains GLA, an omega-6 fatty acid. It supports hormonal balance, skin barrier function, and reduces certain types of inflammation.
They work on different systems and can complement each other. Some people take both. If you want heart and brain support, fish oil is the priority. If you want hormonal balance, skin improvement, and PMS relief, evening primrose oil is the choice.
Who Has the Lowest GLA Levels?
Research suggests that the following groups are most likely to have low GLA:
Women with PMS or hormonal imbalance, people over 40 whose conversion of linoleic acid to GLA has slowed, those under chronic stress, people with high alcohol intake, and those eating a diet high in processed food and low in whole fats.
Nigerian diets, particularly in urban areas, have shifted significantly toward processed food, refined oils, and fast food. This dietary shift has made GLA deficiency more common than it used to be.
Where to Get Evening Primrose Oil in Nigeria
Nutrify stocks evening primrose oil in Nigeria and delivers nationwide. For women looking for hormonal and skin support, browse the full women's health supplement collection or visit nutrifyng.com to see current products and pricing.
