Ultimate guide to starflower oil: potential benefits, uses, side effects

Starflower oil is getting plenty of attention in the wellness world, but is it truly deserving of its spotlight? Here's what the science tells us so far.

Summary

  • What is starflower oil? Derived from borage seeds, this oil is rich in gamma-linolenic acid (GLA), a key omega-6 fatty acid.
  • Potential benefits: May help ease joint pain, support skin health, reduce PMS symptoms, and lower risk of post-weight-loss regain.
  • Side effects: Generally safe, but not suitable for everyone. It may cause mild issues like bloating or headaches and can interfere with certain medications or conditions.

From joint relief to skin support and hormonal balance, starflower oil has been linked to several wellness perks. While much of the evidence is anecdotal or early-stage, plenty of people feel it's worth a try. Let’s explore its benefits, how to use it, and any safety concerns.

What is starflower oil?

Starflower oil is made from the seeds of the borage plant, known formally as Borago officinalis. Often called ‘starflower’ thanks to its small, star-shaped blue flowers, this plant lends its name to the oil. You may also see it labeled as borage oil or borage seed oil.

Possible benefits of starflower oil

This plant-based oil is the richest known natural source of gamma-linolenic acid (GLA), an omega-6 fatty acid that the body converts into hormone-like substances called prostaglandins. These play a role in regulating inflammation and other bodily functions.

Starflower oil may reduce joint discomfort

Several studies suggest that borage oil could help ease symptoms of rheumatoid arthritis (RA). One study found that it may improve pain and function without increasing side effects. In another trial that lasted 18 months, participants with synovitis—an inflammation of joint tissue—showed long-term improvements whether they used borage oil, fish oil, or both. Other research noted reductions in joint stiffness and tenderness.

However, it’s important to note that starflower oil is not approved in the U.S. to treat any medical condition. More large-scale, controlled studies are necessary to confirm these early findings.

Starflower oil could improve skin health

Thanks to its GLA content, starflower oil might support skin structure, hydration, and barrier function. A review of plant oils published in 2018 highlighted its potential benefits for atopic dermatitis. In children with this condition, borage oil appeared to help restore the skin’s barrier.

Other research suggests that starflower oil could assist with acne by reducing lesion size. One study using a 2-gram daily supplement observed a decrease in skin redness, though other skin factors like hydration and roughness didn’t change.

Starflower oil may be a tool to support weight loss

Starflower oil isn’t likely to help you burn fat directly, but one study showed that people who had formerly struggled with obesity regained less weight after taking 5g of borage oil daily. Researchers believe GLA may play a role in this effect by supporting metabolic function.

Starflower oil might help with hormone rebalance

For those dealing with PMS symptoms, the NHS sometimes suggests starflower or evening primrose oil—both sources of GLA—as a natural option to ease breast pain. Yet, research remains mixed, and the precise mechanism by which GLA helps is still unclear.

In one trial, women with cyclic breast pain who took a formula containing GLA, iodine, and selenium reported needing fewer painkillers and experienced less breast lumpiness. However, we can’t say whether it was GLA, iodine, selenium, or the mix that made the difference.

What about the side effects of starflower oil?

For most people, starflower oil is well tolerated. Mild issues like nausea, bloating, indigestion, or headaches can occur, but serious side effects are uncommon. Even so, it’s always a good idea to talk to your doctor before adding any supplement to your routine.

That said, starflower oil isn't suitable for everyone:

  • GLA may increase the risk of miscarriage, so it's best to avoid if you're trying to get pregnant.
  • Since GLA might slightly thin the blood, people on anticoagulants (like warfarin) should use caution.
  • If you have epilepsy, starflower oil is generally not advised.

Getting starflower oil into your diet

You can take starflower oil in either of the following forms:

  • As a liquid oil
  • In softgels or capsules

Currently, there's no official recommended intake or upper limit for starflower oil in the UK or EU. Some NHS materials offer guidelines for specific uses, but it’s crucial to check product labels to stay within safe limits.

The final say

While the hype around starflower oil is real, the scientific backing varies. For certain concerns like skin health or menstrual symptoms, anecdotal and preliminary research offers some promise. It won’t be a miracle fix, but for many, the potential benefits justify a closer look.

Just make sure to consult a healthcare provider first, especially if you’re taking other medications or have specific health conditions.

Disclaimer

The advice in this article is for informational purposes only and should not replace medical care. Always consult with a healthcare professional before trying supplements, treatments, or natural remedies. Food supplements should not be used as a substitute for a varied diet and healthy lifestyle.

This article may reference products available in retail stores. Please consult your doctor when considering any health-related decisions.

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