Uses

Evening primrose oil (EPO) is made from the seeds of evening primrose flowers, native to North America. People traditionally used it to treat conditions including bruises, hemorrhoids, and sore throats.

1. It may help ease acne

Some people believe the GLA in EPO may help acne by reducing skin inflammation and the number of skin cells that cause lesions. It may also help the skin retain moisture.

According to a 2022 studyTrusted Source, EPO may help relieve specific side effects from the medication isotretinoin (Accutane).

An older 2014 study found that GLA supplementation reduced inflammatory and noninflammatory acne lesions.

However, larger, longer studies are still needed to determine the safety and effectiveness of evening primrose oil.

2. It may help ease eczema

Some countries other than the United States have approved EPO to treat eczema, an inflammatory skin condition.

A 2018 studyTrusted Source in South Korea concluded that EPO improved the Eczema Area Severity Index (EASI) score in people with mild eczema compared to a placebo. The studies’ authors noted that transepidermal water loss and skin hydration were slightly improved in the EPO group.

The review didn’t look at the effectiveness of topical EPO for eczema.

3. It can help improve overall skin health

The GLA in EPO may benefit skin structure and function. Because the skin can’t produce GLA alone, taking GLA-rich EPO may help keep the skin healthy.

Both previously mentioned studies noted that EPO improved skin hydration in participants.

According to an older 2005 studyTrusted Source, oral supplementation of EPO may help smooth skin and improve its:

elasticity

moisture

firmness

fatigue resistance

4. It may help relieve PMS symptoms

A 2019 studyTrusted Source suggests EPO may be effective in treating premenstrual syndrome (PMS) symptoms, such as:

breast swelling

irritability

bloating

acne

Researchers believe some people experience PMS because they’re sensitive to prolactin levels in the body. GLA converts to a substance in the body (prostaglandin E1) thought to help prevent prolactin from triggering PMS.

5. It may help minimize breast pain

Some people may use EPO to relieve cyclical breast pain. Some people believe the GLA in EPO is thought to reduce inflammation and help inhibit prostaglandins that cause cyclical breast pain.

However, a 2021 review of researchTrusted Source found that EPO was only as effective as a placebo compared to topical nonsteroidal anti-inflammatory drugs (NSAIDs), danazol, or vitamin E.

The authors also noted that EPO is unlikely to cause adverse side effects. So it may be safe to try.

6. It may help reduce hot flashes

Some people believe EPO may reduce the severity of hot flashes, one of the most uncomfortable side effects of menopause.

A small 2021 studyTrusted Source that used participant questionnaires found that taking EPO during menopause may result in less frequent and less severe night sweats.

However, the National Center for Complementary and Integrative Health (NCCIH)Trusted Source notes that there’s not enough evidence to support the effectiveness of EPO for hot flashes or other menopause side effects.

7. It may help improve heart health

Heart disease kills more than 600,000 peopleTrusted Source in the United States each year. Hundreds of thousands more are living with the condition. Some people are using natural remedies, such as EPO, to help.

A 2020 review of researchTrusted Source suggests that EPO may have a beneficial effect on cholesterol levels, though some research was inconclusive. Additional research is still needed to support the use of EPO to support heart health.

9. It can help reduce nerve pain

Peripheral neuropathy is a common side effect of diabetes and other conditions. A 2018 review of researchTrusted Source notes that animal studies have shown that fatty acids like linolenic acid may potentially help reduce neuropathy symptoms, such as:

hot and cold sensitivity

numbness

tingling

weakness

However, human clinical trials are still needed to show whether these results may extend to humans.

10. It may help ease bone pain

Bone pain is often caused by rheumatoid arthritis, a chronic inflammatory disorder. According to a small 2017 studyTrusted Source, the GLA in EPO can potentially reduce rheumatoid arthritis pain without causing unwanted side effects.

However, larger studies are still needed to confirm this.

EPO is generally considered safe for most people to use short term. The safety of long-term use hasn’t been determined.

Supplements aren’t monitored for quality by the Food and Drug Administration (FDA). When choosing EPO, research the supplement and the company selling the product. Choosing one that has been certified by a third party may be safer.

Side effects of EPO are usually mild and may include:

• upset stomach
• stomach pain
• headache
• soft stools

Taking the least amount possible may help prevent side effects.

There’s not enough research on EPO to determine its safety during pregnancy or breastfeeding.

In rare cases, EPO may cause an allergic reaction. Some symptoms of allergic reaction are:

• inflammation of the hands and feet
• rash
• difficulty breathing
• wheezing

If you experience any of the above symptoms after taking EPO, call 911 or your local emergency services.

Disclaimer: Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.