Omega-7 is a fatty acid that may support skin and heart health, but the research is still developing

Omega-7 is a monounsaturated fatty acid found mainly in sea buckthorn oil, macadamia nuts, and some fish. Unlike omega-3 and omega-6, which have decades of research behind them, omega-7 has fewer human studies—but the ones that exist suggest it may help with skin barrier function, cholesterol levels, and inflammation markers. The evidence is real but modest, and most comes from small trials or animal work.

If you're considering omega-7, the practical question is whether the cost and effort of adding another supplement makes sense for your situation. This guide walks through what omega-7 actually does, what the research shows, how to source it, and whether it's worth trying alongside or instead of other marine oils you may already take.

Key Takeaways

  • Omega-7 may improve skin hydration and reduce inflammation, but human research is limited to small studies and short timeframes.
  • Sea buckthorn oil is the most common source, though macadamia nuts and some fish oils contain smaller amounts.
  • Typical doses in research studies range from 500 to 2,000 mg daily, taken with food for better absorption.
  • Omega-7 does not replace omega-3; the two work through different pathways and may be used together if budget allows.
  • Talk to your doctor before starting omega-7 if you take blood thinners or have a shellfish allergy, since some products are sourced from marine organisms.

What the research shows about omega-7 and skin health

The most consistent findings for omega-7 involve skin hydration and barrier repair. A 2016 study published in Lipids in Health and Disease found that women taking 500 mg of sea buckthorn oil daily for 12 weeks reported improvements in skin moisture and elasticity compared to placebo. A smaller 2011 trial showed similar results for skin hydration after eight weeks at 1,000 mg daily.

These studies are real but small—typically 30 to 50 participants—and they measure self-reported outcomes like "skin feels softer" rather than objective markers. The mechanism appears to involve omega-7's role in maintaining the lipid composition of skin cells, which helps the skin hold water. If you have dry or sensitive skin, omega-7 may be worth a three-month trial to see if you notice a difference; if you don't, the cost is probably not justified.

One important note: these benefits took 8 to 12 weeks to appear in the studies, so a two-week trial will not tell you much. Skin changes happen slowly.

Omega-7 and cholesterol or inflammation markers

Several small studies suggest omega-7 may lower LDL cholesterol and triglycerides slightly and reduce inflammatory markers like C-reactive protein. A 2010 trial in Nutrition, Metabolism and Cardiovascular Diseases found that 500 mg of sea buckthorn oil daily for 12 weeks reduced LDL by about 10 percent in people with high cholesterol. Another study showed improvements in fasting glucose and insulin resistance in people with metabolic syndrome.

Again, these are small trials with modest effect sizes. The changes are real but not dramatic—you would not stop taking a statin for omega-7, and you should not expect it to replace diet or exercise. If you already take omega-3 for heart health, adding omega-7 is a "nice to have" rather than a must-have, unless you have specific skin concerns that might benefit from it.

If you have diabetes, prediabetes, or high triglycerides, mention omega-7 to your doctor before starting, since it may interact with medications or affect blood sugar monitoring.

How to choose and source omega-7 supplements

Sea buckthorn oil is the most common source and comes in two forms: the whole berry oil (which includes the seed oil and pulp oil) and seed oil alone. Whole berry oil contains more omega-7 and other compounds, but seed oil is often cheaper. Look for products that list the omega-7 content per serving—it should be at least 200 to 300 mg per capsule or serving to make dosing practical.

Reputable brands include Sibu, Weleda, and Sunwider, though many smaller suppliers exist. Check the label for third-party testing (NSF, USP, or ConsumerLab) to confirm the omega-7 content matches what the label claims. Sea buckthorn oil has a strong, tart taste if you buy the liquid form, so capsules are usually more tolerable.

Macadamia nuts contain about 17 percent omega-7 by weight, making them a food source if you enjoy them. A small handful (about 1 ounce) provides roughly 200 mg of omega-7. This is cheaper than supplements but less concentrated, so you would need to eat them regularly and consistently.

Some fish oils, particularly those from mackerel or herring, contain small amounts of omega-7, but not enough to be a primary source. If you already take fish oil, check the label; if it lists omega-7, you may not need a separate supplement.

Typical dosing and how to take omega-7

Research studies used doses ranging from 500 to 2,000 mg daily, most commonly 500 to 1,000 mg. Start at the lower end—500 mg daily—and take it with a meal containing fat, since omega-7 is fat-soluble and absorbs better with food. After four to six weeks, you can increase to 1,000 mg if you want to match the doses used in the skin health studies.

Sea buckthorn oil can cause mild digestive upset in some people, particularly loose stools or stomach discomfort. If this happens, reduce the dose or take it with a larger meal. Most people tolerate it well, but starting low and increasing gradually gives your body time to adjust.

Omega-7 is not stored in your body the way some fat-soluble vitamins are, so you need to take it consistently to maintain any benefit. If you stop, the effect will fade over weeks to months.

Omega-7 versus omega-3: do you need both?

Omega-3 and omega-7 are different fatty acids that work through different pathways. Omega-3 (from fish oil or algae) is well-established for heart and brain health and has decades of research. Omega-7 is newer and more focused on skin and metabolic markers. They do not compete; you can take both if you want to, and some people do.

The practical decision depends on your budget and priorities. If you already take omega-3 and your main interest is skin health, omega-7 is a reasonable add-on. If you are just starting and have to choose one, omega-3 has stronger evidence and broader benefits, so it makes sense to start there. If you have both skin concerns and cardiovascular risk, you might eventually take both, but there is no harm in starting with omega-3 alone and adding omega-7 later if you notice your skin is still dry or inflamed.

Storage, shelf life, and what to watch for

Sea buckthorn oil oxidizes relatively quickly once opened, especially the liquid form. Store capsules in a cool, dark place and use within the expiration date on the bottle. Liquid sea buckthorn oil should be refrigerated after opening and used within two to three months. If the oil smells rancid or off, discard it.

Sea buckthorn oil can stain clothing and skin temporarily (it has a bright orange color), so be careful when opening capsules or handling the liquid. This is harmless but worth knowing if you are taking it in the morning before getting dressed.

Some sea buckthorn products are sourced from plants grown in China or Russia, while others come from Scandinavian suppliers. There is no quality difference based on origin, but if you have a preference for sourcing, check the label or contact the manufacturer.

Frequently Asked Questions

Can I take omega-7 if I am on a blood thinner like warfarin?

Omega-7 has mild anticoagulant properties, so talk to your doctor before starting it. You may be able to take it, but your doctor may want to monitor your INR more closely or adjust your dose. Do not start omega-7 without mentioning it to your prescriber.

How long does it take to see results from omega-7?

Skin changes typically appear after 8 to 12 weeks of consistent use. Cholesterol or inflammation markers may shift within 4 to 8 weeks, but these changes are usually small. Give it at least three months before deciding whether it is working for you.

Is sea buckthorn oil safe if I have a shellfish allergy?

Sea buckthorn oil comes from a plant berry, not shellfish, so it is safe for shellfish allergies. However, some sea buckthorn products are processed in facilities that also handle fish or shellfish. Check the label for allergen warnings, or contact the manufacturer if you have a severe allergy.

Can I get enough omega-7 from food alone?

Macadamia nuts are the most practical food source, providing about 200 mg per ounce. If you eat a small handful daily, you could reach 500 mg weekly, but most people find it easier to use a supplement for consistent dosing. Food sources work, but supplements are more reliable.

Does omega-7 interact with other supplements or medications?

Omega-7 has minimal interactions, but mention it to your doctor if you take blood thinners, diabetes medications, or cholesterol drugs. It may have additive effects with these medications, which is usually fine but worth monitoring.