Omega-3 for Skin: What It Does and the Best Food Sources
What does omega-3 do for skin? How essential fatty acids relate to the skin barrier, the best food sources, and what research does and doesn't show.
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Omega-3s are fats your body can’t make in useful amounts, so they have to come from food. Essential fatty acids are part of what keeps skin working normally, including its outer barrier. Research on omega-3 and specific skin outcomes is still developing. The simplest, food-first approach is oily fish such as salmon, sardines or mackerel once or twice a week, plus flax, chia and walnuts.
Here’s what omega-3s are, what the research does and doesn’t show for skin, and where to find them on your plate.
What Omega-3s Are and Why They’re “Essential”
There are three main omega-3 fatty acids, according to the NIH Office of Dietary Supplements (ODS):
- ALA (alpha-linolenic acid). Found mainly in plant oils such as flaxseed, soybean and canola oils, plus nuts and seeds.
- EPA (eicosapentaenoic acid). Found in fish and other seafood.
- DHA (docosahexaenoic acid). Also found in fish and other seafood.
ALA is called essential because your body can’t make it. The body converts some ALA into EPA and then DHA, but ODS says “only in very small amounts.” That’s why eating EPA and DHA directly, mainly from seafood, is the practical way to raise levels of them.
ODS also notes that omega-3s are “important components of the membranes that surround each cell in your body.” Skin cells are included in that.
Omega-3 and the Skin Barrier: What’s Known
Your skin’s outer layer works a bit like a brick wall. Flattened skin cells are the bricks, and a mix of fats and proteins acts as the mortar. The Linus Pauling Institute uses this same “brick and mortar” picture, and explains that a lack of essential fatty acids is one of the things that can disrupt that barrier and let water escape.
On essential fatty acids specifically, the Linus Pauling Institute’s skin health review says:
- Omega-6 and omega-3 fats “play a critical role in normal skin function and appearance.”
- Omega-6 fats have “a particular role in structural integrity and barrier function of the skin.”
- Both families give rise to signaling molecules that influence the skin’s inflammatory response.
- Eating oils rich in these fats can change the fatty acid makeup of the outer skin layer.
The clearest evidence comes from deficiency. ODS lists “rough, scaly skin and a red, swollen, itchy rash” as possible signs of omega-3 deficiency, and adds that deficiency is very rare in the United States.
What’s Still Uncertain
This is where a lot of “fish oil for glowing skin” content overreaches. Knowing that skin needs essential fats doesn’t mean that taking more will give you better-looking skin.
The Linus Pauling Institute reports that some studies of omega-3 supplements and topical application have looked at sun-related skin damage and signs of skin aging. Those findings are worth knowing about, but they don’t add up to a reliable everyday promise. ODS describes omega-3 research in general as ongoing, noting that “it is not clear” whether the health benefits seen in people who eat seafood come from the omega-3s or from the foods themselves.
In short, omega-3s are part of normal skin function, a diet with enough of them is sensible, and specific skin benefits from extra omega-3 aren’t established.
Best Food Sources of Omega-3
ODS lists these foods as good sources:
| Food | Main omega-3 | Notes |
|---|---|---|
| Salmon | EPA and DHA | A cold-water fatty fish |
| Mackerel | EPA and DHA | A cold-water fatty fish |
| Sardines | EPA and DHA | Canned sardines count |
| Herring | EPA and DHA | Often pickled or smoked |
| Tuna | EPA and DHA | Listed by ODS among cold-water fish |
| Flaxseed and flaxseed oil | ALA | Seeds, or the oil |
| Chia seeds | ALA | Good in yogurt or porridge |
| Walnuts | ALA | A simple snack |
| Soybean and canola oil | ALA | Common cooking oils |
| Fortified eggs, yogurt, milk | Varies | Check the label |
How much do you need? ODS says experts have only set recommended amounts for ALA: 1.6 g a day for men and 1.1 g a day for women. There are no official targets for EPA and DHA. ODS also notes that the American Heart Association recommends one to two servings of seafood a week. Most people in the United States already get enough ALA from food, per ODS.
Oily fish fits naturally into an ancestral way of eating. Our complete guide to ancestral eating and our 10 anti-inflammatory meals include easy fish dishes. For more on nutrient-dense traditional foods, see organ meats 101. For the whole plate, see our guide to a diet for glowing skin.
Omega-3 and Omega-6 Balance
You’ll often hear that the ratio of omega-6 to omega-3 is what matters for skin. The research picture on omega-6 is more nuanced than the online debate suggests, and the Linus Pauling Institute notes that omega-6 fats are themselves important for the skin barrier. We cover the evidence in seed oils: what the research says. The practical step is to add omega-3 foods rather than fear omega-6 ones.
Supplements: Talk to Your Doctor First
Food is the simplest starting point. If you’re thinking about fish oil, krill oil or algal oil (a vegetarian option), ask a doctor or pharmacist first. ODS gives a few reasons:
- High doses of omega-3s may cause bleeding problems when taken with warfarin or other anticoagulant medicines.
- The FDA recommends no more than 5 g a day of EPA and DHA combined from supplements.
- Side effects are usually mild, such as an unpleasant taste, heartburn, nausea or stomach upset.
If you take a blood thinner, are pregnant or have a health condition, please check with your doctor before starting any supplement.
Supporting Your Barrier From the Outside
Diet works from the inside. From the outside, a moisturizer helps the barrier hold on to water. The Mayo Clinic’s advice on dry skin suggests moisturizing while skin is still damp and looking for ingredients such as ceramides, fatty acids, glycerin and shea butter.
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One example is the COSRX The Ceramide Skin Barrier Moisturizer at Mirai Skin. The listing says its key ingredients include seven ceramides, cholesterol and fatty acids, along with hyaluronic acids, squalane and panthenol, and it recommends a patch test on the body before use. Our sister site Glow Coded compares more options in its guide to the best ceramide creams. If you like layering, our snail mucin guide covers another popular barrier-friendly step.
If dryness, itching or a rash doesn’t settle, see a doctor or dermatologist.
Frequently Asked Questions
Is omega-3 good for your skin?
Omega-3s are essential fats, and essential fatty acids are part of normal skin function and the skin barrier. Studies on specific skin benefits from extra omega-3 are still limited.
What are the best food sources of omega-3?
Oily fish such as salmon, mackerel, sardines and herring for EPA and DHA, and flaxseed, chia seeds and walnuts for ALA, according to the NIH Office of Dietary Supplements.
Should I take fish oil for my skin?
Food is the simplest place to start. Ask a doctor or pharmacist before taking any supplement, especially if you take blood thinners.
How long does omega-3 take to affect skin?
There’s no reliable timeline, and research hasn’t established a specific skin effect to time. Focus on eating omega-3 foods regularly.
Can I put omega-3 on my skin?
Some skincare products contain oils rich in fatty acids. For everyday dryness, a moisturizer with ceramides and fatty acids is the more common barrier step.
Sources
- NIH Office of Dietary Supplements. Omega-3 Fatty Acids, Fact Sheet for Consumers. https://ods.od.nih.gov/factsheets/Omega3FattyAcids-Consumer/
- Linus Pauling Institute, Oregon State University. Skin Health. https://lpi.oregonstate.edu/mic/health-disease/skin-health
- Linus Pauling Institute. Essential Fatty Acids and Skin Health. https://lpi.oregonstate.edu/mic/health-disease/skin-health/essential-fatty-acids
- Mayo Clinic. Dry skin: Diagnosis and treatment. https://www.mayoclinic.org/diseases-conditions/dry-skin/diagnosis-treatment/drc-20353891
