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You have a routine.
Cleanser, serum, moisturiser. Maybe something heavier at night. You’ve upgraded twice this year, once after a reel, once because a friend swore by it. You apply it properly. You give it time.
And by 4pm your face feels tight again.
The moisturiser isn’t failing, exactly. It’s doing what moisturiser does, which is sit on the surface and slow water from leaving. What it can’t do is rebuild the thing that’s letting the water out.
Because your skin barrier isn’t made of cream. It’s made of fat. And the fats it’s built from come from what you eat.
Your Skin Barrier Is Made of Fat, Not Water
The outer layer of your skin, the stratum corneum, looks under a microscope a bit like brickwork. Flattened cells packed together, and between them a lipid matrix holding it all in place.
That matrix is what actually waterproofs you. A review in Dermatology Practical & Conceptual puts the working ratio at roughly 50% ceramides, 25% cholesterol, and 10 to 20% free fatty acids.
Some of those lipids your skin makes itself. Others it cannot make at all. Those have to arrive through your diet, get absorbed, and be built into the barrier from underneath.
Moisturiser works on the top of the wall. Diet supplies the mortar.
Why Your Skin Loses Water: What TEWL Actually Means
There’s a metric in skin research called transepidermal water loss, or TEWL. It’s exactly what it sounds like: how much water escapes through your skin. Low means the barrier is intact. High means it’s leaking.
Here’s the sentence the whole argument rests on. According to the Linus Pauling Institute at Oregon State University, TEWL is directly related to the essential fatty acid composition of the structural lipids in the stratum corneum.
The rate at which your skin loses water is tied to the fats it’s built from.
Dry, rough, reactive skin isn’t always mysterious. Sometimes it’s a structural shortage with a name.
Can Supplements Actually Help Dry Skin? What a 12-Week Trial Found
The study worth knowing about was published in the British Journal of Nutrition in 2009.
De Spirt and colleagues took 45 women with dry, sensitive skin and split them into three groups for twelve weeks. One took flaxseed oil. One took borage oil. The third took a placebo. Everything was measured with instruments, not questionnaires.
Water loss dropped about 10% by week six in both oil groups. Hydration rose significantly by week twelve. Roughness and scaling fell significantly. Redness diminished.
The placebo group? Apart from hydration, nothing moved.
Two different oils. Two different fatty acids. Both worked, on slightly different things. Which tells you something important: your barrier isn’t asking for one fat. It’s asking for several.
Borage matters here for a specific reason. It’s the richest plant source of GLA, an omega-6 your skin genuinely cannot make. Your body is supposed to build GLA from other fats, but it’s slow and unreliable at it. Writing in Skin Pharmacology and Physiology, Neukam and colleagues describe GLA as conditionally essential for skin: the skin cannot synthesise it, so it depends on preformed GLA arriving from the diet.
And then there’s the one almost nobody in India is explaining properly.
Sea Buckthorn Oil vs Juice: The Part Almost Nobody Gets Right
Sea buckthorn is everywhere right now. Every product on Indian shelves is a juice, and they all say the same four things: immunity, vitamin C, glow, antioxidants.
Here’s what almost none of it tells you.
Sea buckthorn makes two completely different oils, and they are not interchangeable.
A placebo-controlled trial published in the Journal of Nutritional Biochemistry analysed both:
Seed oil is mostly linoleic acid (34%) and alpha-linolenic acid (25%). An omega-3 and omega-6 oil. Useful, but ordinary. You can get those fats from a dozen places.
Fruit oil, pressed from the flesh and peel, is where palmitoleic acid, omega-7, actually lives. Around 25% in that analysis, with other studies reporting 24 to 39%.
The omega-7 is in the fruit. The seed oil has essentially none of it.
And omega-7 isn’t an ordinary fat. A review in Lipids in Health and Disease describes palmitoleic acid as a structural component of skin and mucosal membranes, which is why it appears in research on barrier tissue rather than in the usual omega-3 conversation.
Which means a brand can tell you sea buckthorn is a rare source of omega-7, sell you something pressed from the seed, and both statements stay technically true while the product delivers nothing you came for. And when a label just says “sea buckthorn oil,” you have no way of knowing which one is in your hand.
The same trial confirmed the mechanism works. Fruit oil supplementation significantly raised palmitoleic acid in participants’ plasma. Eat the fruit oil, and the omega-7 turns up in circulation where your body can actually use it.
So, What About the Juice You Already Bought?
Fair question, and the honest answer is: it isn’t a waste.
Juice contains pulp, so there’s some omega-7 in there. It’s also genuinely rich in vitamin C and antioxidants, and those are real benefits. If you like it, keep drinking it.
But it’s a whole-fruit product. The fatty acids are diluted across water, fibre, sugars, and everything else in the berry. It’s doing an antioxidant job, not a barrier job. If omega-7 is what you’re after, juice is the long way round.
Ours is fruit oil. CO₂ supercritical extracted, which is the method that protects the fatty acids rather than cooking them. We test the omega-7 content in every batch, and the certificate is sitting on the product page for you to read before you buy anything.
It’s also why our softgels are golden-red rather than pale. That colour is carotenoids and omega-7, not dye. The lab’s own words for the raw oil are “orange red viscous oil,” which is a measurement, not a marketing line.
That’s why sea buckthorn is our hero ingredient and not a bullet point.
What to Take for Dry Skin
Vegan Multi Omega 3-5-6-7-9 is built around sea buckthorn fruit oil, with four supporting oils that each cover something it doesn’t: flaxseed for omega-3, borage for the GLA your skin can’t make, pomegranate seed for omega-5, olive for omega-9.
Five oils, one softgel, 1000mg of actives. The capsule is VegeSoftgels®, starch-based rather than gelatin, so the shell is plant-based too and not just what’s inside it.
One softgel daily, after a meal. Fats absorb better alongside other fats, so the timing isn’t arbitrary.
The full breakdown is on the label, on the product page, with the batch lab reports next to it.
Explore Vegan Multi Omega 3-5-6-7-9 → letssupp.com/products/vegan-multi-omega
How Long Skin Supplements Take to Work
Longer than you’d like.
Your skin replaces itself roughly every 28 days. Fatty acids have to be absorbed, transported, and built into new cells as they form. Nothing you swallow changes the barrier you already have.
The De Spirt trial found its first significant improvement at six weeks, and the fuller effect at twelve.
That’s the real timeline, from a controlled trial. If something promises glowing skin in seven days, it isn’t talking about your skin barrier.
When Dry Skin Isn’t a Nutrition Problem
Worth saying plainly, because oil isn’t always the answer.
Dry, irritated skin can be hypothyroidism. It can be eczema or psoriasis, which need a dermatologist, not a softgel. It can be over-exfoliation or a retinoid your barrier hasn’t adjusted to, in which case the fix is doing less rather than eating more.
If your skin changed suddenly, if there’s cracking or bleeding, or if it arrived alongside fatigue, hair thinning, or feeling cold all the time, see a doctor before you change your supplements. Nutrition supports a barrier. It doesn’t override a medical condition.
Not sure where to start? Our two-minute quiz asks about your diet, your symptoms, and what you’re actually trying to fix, then tells you which formula fits and which one doesn’t. Find My Ritual → letssupp.com/pages/find-my-ritual
Also worth reading:
Omega 3-5-6-7-9 Explained: Why Your Body Needs All Five Fatty Acids → letssupp.com/blogs/news/why-your-body-needs-all-five-fatty-acids
What Are Third-Party Lab Reports, and Why Most Supplement Brands in India Won’t Show You Theirs → letssupp.com/blogs/news/third-party-lab-reports-supplement-safety-india
Frequently Asked Questions
Why is my skin dry even though I moisturise every day?
Moisturiser works on the surface, slowing water from escaping. It doesn’t rebuild the skin barrier itself, which is a lipid matrix made partly from fatty acids your body cannot produce and has to get from food. If the barrier is structurally short of those fats, it keeps leaking water regardless of what you apply on top.
Can supplements really help dry skin, or is that marketing?
A randomised placebo-controlled trial in the British Journal of Nutrition found 12 weeks of flaxseed or borage oil significantly reduced transepidermal water loss and improved hydration, roughness, and scaling, while the placebo group barely moved. The effect is real but gradual, and it works on barrier function rather than producing overnight cosmetic change.
What’s the difference between sea buckthorn seed oil and fruit oil?
Different oils from different parts of the same berry. Analysis published in the Journal of Nutritional Biochemistry found seed oil is predominantly linoleic acid (34%) and alpha-linolenic acid (25%), while fruit oil, pressed from the flesh and peel, carries palmitoleic acid (omega-7) at around 25%, with other analyses reporting 24 to 39%. If omega-7 is what you want, fruit oil is the relevant form. Seed oil has very little.
Is sea buckthorn juice as good as sea buckthorn oil?
For vitamin C and antioxidants, juice is a reasonable choice. For omega-7 specifically, it isn’t efficient. Juice is a whole-fruit product where the fatty acids are diluted among water, fibre, and everything else in the berry. Concentrated fruit oil is the direct route.
Why does borage oil matter for skin?
Borage is the richest known plant source of gamma-linolenic acid. Research describes GLA as conditionally essential for skin, meaning skin can’t synthesise it and depends on preformed GLA from the diet. Trials in Archives of Gerontology and Geriatrics and the British Journal of Nutrition have both examined its effect on transepidermal water loss.
How long before I see a difference in my skin?
Skin turns over roughly every 28 days, and dietary fats have to be absorbed and built into new cells. The British Journal of Nutrition trial recorded its first significant improvement at six weeks and a fuller effect at twelve.
This post is for informational purposes and is not a substitute for medical advice. If you have persistent or severe skin symptoms, please consult a qualified healthcare professional.
Written by Dr. Nancy Taneja, Ph.D. in Medical Genetics | Founder, Let’s Supp
