Evening Primrose Oil vs Borage Oil: Which Is Better for Hormonal Balance?
By Olympian Labs | Published: 2026-09-09
Category: Comparisons
Compare evening primrose oil and borage oil for hormonal balance. Learn key differences, benefits, and which oil suits your needs best.
Quick Answer
Both evening primrose oil and borage oil are rich in gamma-linolenic acid (GLA), an omega-6 fatty acid that supports hormonal balance. Borage oil typically contains a higher concentration of GLA, so you may need fewer capsules for the same effect. However, evening primrose oil has a longer history of use for PMS and breast discomfort. Your choice depends on your sensitivity, budget, and whether you prefer a higher GLA dose per serving.

Hormonal fluctuations can affect your mood, skin, and comfort throughout the month. Many people turn to GLA supplements like evening primrose oil and borage oil to support their body's natural balance. But with both offering similar benefits, how do you decide which one is right for you?
This comparison breaks down what each oil offers, how they differ, and which one might fit your needs better. We'll look at the science of GLA, practical considerations, and how to choose based on your specific hormonal concerns.
Understanding GLA and Hormonal Balance
Gamma-linolenic acid (GLA) is an omega-6 fatty acid that your body can convert into hormone-like substances called prostaglandins. These compounds help regulate inflammation, skin health, and smooth muscle function. Many women find GLA helpful for easing PMS symptoms like breast tenderness, bloating, and mood swings.
Both evening primrose oil and borage oil are excellent sources of GLA, but they differ in concentration. Borage oil typically provides a higher amount of GLA per capsule, which means you might need fewer capsules to reach a target dose. Evening primrose oil usually contains about 8-10% GLA, while borage oil can contain 20-24% GLA. This difference can influence your choice if you prefer a higher dose without taking multiple pills.
- Check the GLA percentage on the label to compare potency between products.
- If you're new to GLA, starting with a lower dose and gradually increasing can help your body adjust.
Evening Primrose Oil: Benefits and Considerations
Evening primrose oil (EPO) is extracted from the seeds of the evening primrose plant. It's one of the most widely studied GLA supplements, particularly for PMS and breast pain. Many women report noticeable relief from cyclical breast tenderness and mood-related PMS symptoms when taking EPO consistently for a few months.
EPO is also popular for skin health, especially for dry or irritated skin. Some people use it to support a clear complexion during hormonal breakouts. Because EPO has a lower GLA concentration, you may need to take more capsules daily to achieve the desired effect, which can be a consideration for cost and convenience.
Borage Oil: Benefits and Considerations
Borage oil comes from the seeds of the borage plant, also known as starflower. Its claim to fame is its high GLA content, often double that of evening primrose oil. This makes it an efficient choice for those who want a potent GLA supplement without taking several capsules.
Borage oil is often chosen for inflammatory conditions like rheumatoid arthritis, though research is ongoing. It also supports skin health and hormonal balance. However, some people may find borage oil slightly more expensive per bottle, and there have been rare concerns about certain compounds in borage oil, so it's wise to choose a reputable brand that tests for purity.
How to Choose Between Them
When deciding between evening primrose oil and borage oil, consider your primary goal. If you're specifically targeting PMS symptoms or breast tenderness, evening primrose oil has a stronger track record in studies. If you want a higher GLA dose with fewer capsules, borage oil might be more convenient.
Also consider your sensitivity. Some people find that higher GLA doses can cause mild stomach upset or headaches when first starting. Starting with a lower dose and increasing gradually can help. And if you're taking blood-thinning medication or have a bleeding disorder, consult your doctor before adding GLA supplements.
- For PMS and breast comfort, evening primrose oil is often the first choice.
- For a potent GLA source with less pill burden, borage oil may be better.
- Always check for third-party testing to ensure purity and potency.
Trade-Offs at a Glance
- GLA Concentration: Borage oil typically has a higher GLA percentage, so you may need fewer capsules. Evening primrose oil has a lower concentration, requiring more capsules for an equivalent dose. If convenience matters, borage oil wins; if you prefer a more traditional approach, EPO works.
- Research Support: Evening primrose oil has more published research for PMS and breast pain. Borage oil has some studies but is less established for these specific uses. For PMS relief, EPO has the edge.
- Cost and Availability: Evening primrose oil is often cheaper and more widely available. Borage oil can be pricier due to higher GLA content and sourcing. Budget-conscious buyers may prefer EPO.
Product Facts
- Alpha Lipoic Acid: Olympian Labs Alpha Lipoic Acid is a powerful antioxidant designed to support cellular protection, skin resilience, and metabolic function. Alpha Lipoic Acid is unique because it is both water-soluble and fat-soluble, allowing it to work throughout the body to help neutralize free radicals and support healthy aging. While not a GLA oil, Alpha Lipoic Acid complements a hormonal balance routine by supporting metabolic health and reducing oxidative stress, which can indirectly affect hormone regulation.
- Chromium Picolinate: Olympian Labs Chromium Picolinate Chromax provides a bioavailable form of chromium designed to support healthy glucose metabolism and everyday nutritional balance. Chromium is a trace mineral that plays a role in carbohydrate and fat metabolism. Balancing blood sugar can help reduce cravings and energy dips associated with hormonal fluctuations, making it a useful addition to a holistic approach.
Which Oil Fits You?
Best For
- Those seeking a well-researched option for PMS symptoms and breast tenderness.
- People who prefer a lower GLA dose and are comfortable taking multiple capsules daily.
Not For
- Those who want a high-potency GLA supplement with minimal capsules—consider borage oil instead.
- Individuals with a known allergy to borage or evening primrose oil.
Both evening primrose oil and borage oil offer valuable GLA support for hormonal balance. Choose evening primrose oil for its research backing and affordability, or opt for borage oil if you want a more concentrated dose. Whatever you pick, consistency and quality matter—look for reputable brands and consult your healthcare provider if you have underlying conditions.



