Supporting Dry Skin from Within: The Nutrients That Matter

That tight feeling after showering, fine flakes on your shins, rough patches on your elbows: most people know dry skin — especially in the cold season. Creams help from the outside, but skin is also nourished from within. So the interesting question is: which nutrients really matter if you want to support your skin through diet — and where are the limits of what food can achieve?

Why does skin become dry in the first place?

The outermost layer of skin works like a wall: horn cells form the bricks, fats (lipids) the mortar between them. This barrier keeps moisture in the tissue and irritants out. When the lipid film is disrupted, more water evaporates through the skin — it becomes rough, flaky and more sensitive.

The triggers are usually mundane and external: dry heated air, frequent hot showers, harsh cleansing, cold and wind. But the body plays a part too. With age, skin produces less sebum, the hormone balance changes, and a long-term one-sided diet can leave important building blocks missing. This is exactly where support from within comes in — as a foundation, not a miracle cure. We've described in detail how cold and dry air affect the skin in our guide on Nutrients for Skin in Winter.

These nutrients are relevant for normal skin

For several vitamins and minerals, the EU has approved health claims based on EFSA's assessment. These claims always refer to the maintenance of normal skin — not to treating dry or diseased skin. Within exactly that framework, they're a good compass.

Vitamin A

Vitamin A is involved in the renewal and differentiation of skin cells. The approved EU health claim states: "Vitamin A contributes to the maintenance of normal skin." Good sources are liver (in moderation), egg yolk and dairy products; the precursor beta-carotene is found in carrots, sweet potatoes and dark green vegetables. Vitamin A is fat-soluble and stored in the body — so you shouldn't take high-dose products long-term on your own initiative, especially not during pregnancy.

Biotin, niacin and riboflavin

Several B vitamins at once are relevant for skin. "Biotin contributes to the maintenance of normal skin," "niacin contributes to the maintenance of normal skin" and "riboflavin contributes to the maintenance of normal skin" — these are the exact wordings. Biotin is found in eggs, nuts and oats, among other foods, niacin in meat, fish and wholegrains, riboflavin in dairy products and almonds. You can read why these vitamins are often mentioned in the same breath as zinc and selenium in our article on Biotin, Zinc and Selenium for Skin, Hair and Nails.

Zinc and iodine

Zinc is a real all-rounder: it's involved in countless enzyme reactions. The claim is clear-cut — "zinc contributes to the maintenance of normal skin." Pumpkin seeds, oats, cheese and meat provide usable zinc. An approved claim also applies to iodine: "iodine contributes to the maintenance of normal skin." Iodine occurs chiefly in sea fish, milk and iodised table salt.

Vitamin C

Collagen gives skin its firmness and structure. Vitamin C is involved in its formation: "vitamin C contributes to normal collagen formation for the normal function of the skin." Bell peppers, berries, citrus fruits and cabbage are rich sources — and because vitamin C is sensitive to heat, raw vegetables are especially valuable here. Just one red bell pepper or a handful of berries a day gets you a good way towards your daily requirement.

Fatty acids as a building block of the lipid film

For the classic omega-3 fatty acids, approved claims exist for the heart, brain and vision, but there's no specific skin claim. Even so, fats are a fundamental building block of the skin barrier. Oily sea fish, linseed oil, walnuts and rapeseed oil supply omega-3, and high-quality plant oils also provide vitamin E. Gamma-linolenic acid (GLA) from evening primrose oil is also traditionally associated with skin — we look at what's behind this and what's actually confirmed in our guide on Evening Primrose Oil, GLA and the Skin.

Who especially needs support from within?

In principle, a varied mixed diet covers the need for skin-relevant nutrients well. But a closer look is worthwhile in certain life stages and situations: with a strongly one-sided or heavily calorie-reduced diet, with a purely plant-based diet that isn't well planned (zinc, iodine and vitamin B12 are critical here), at an older age, with the increased needs of pregnancy and breastfeeding, and for people who generally eat little fruit, vegetables and good fats.

Lifestyle counts too: anyone who smokes heavily, drinks too little, or is rarely outdoors in winter puts extra strain on their skin. You'll find a broader overview of which vitamins and minerals matter for the body's largest organ in our foundational article on Nutrients for Skin.

Diet first — food supplements as a complement

The most important rule is also the simplest: nutrients work together, and foods deliver them in a sensible combination of vitamins, minerals, plant compounds and fats. A colourful plate beats any single supplement. In practice, that means: vegetables and fruit in several colours daily, quality oils instead of hardened fats, nuts and seeds regularly, oily sea fish or a plant-based omega-3 source once or twice a week. And: drink enough — even though lack of water isn't the main cause of dry skin, good fluid intake supports the whole metabolism.

Food supplements can make sense when individual nutrients are hard to cover through diet — for instance zinc or iodine on a vegan diet. But they're no substitute for a balanced diet and shouldn't be combined at random in high doses. Especially with fat-soluble vitamins like vitamin A, the rule is: more isn't better. If you're unsure whether you're lacking something, have a deficiency checked medically rather than assuming one.

A simple pattern has proven useful for everyday life: deliberately include one colour of vegetable or fruit at every meal, swap some hardened fats for rapeseed or linseed oil, and plan fixed "fish and nut days" into your week. That way you get skin-relevant nutrients almost as a side effect — no pill box needed. Also give your skin time: the outermost horn layer renews itself over several weeks, so visible changes need patience rather than a flurry of action.

What to look for in quality

If you do reach for a supplement, it's worth checking the label. Look for clearly stated amounts per serving, well-absorbed compounds (such as zinc bisglycinate rather than an anonymous "zinc compound"), no unnecessary additives, and traceable origin of raw materials. Reputable suppliers provide information on lab testing for purity and contaminants. Stick to the recommended daily dose stated on the pack, and don't combine several high-dose products without keeping track of your total intake.

Honestly assessed: what's confirmed and what's not

It's confirmed that certain nutrients contribute to the maintenance of normal skin — that's what the approved EU claims stand for. It's also confirmed that a deficiency in these nutrients can show up in the skin. What food supplements don't do, on the other hand: they're not a remedy for dry skin, not a treatment, and no substitute for good basic care from the outside. Anyone eating a balanced diet with no deficiency generally won't get "nicer" skin from extra capsules.

Important to close: persistently very dry, strongly itchy, reddened, weeping or suddenly changed skin needs medical assessment. Skin conditions such as atopic dermatitis or psoriasis, thyroid disorders or metabolic conditions can be behind it — causes that no food supplement addresses. Diet is the foundation, but for serious symptoms it doesn't replace a diagnosis.

Frequently asked questions (FAQ)

Which nutrients matter most for dry skin?

According to the EU, vitamin A, biotin, niacin, riboflavin, zinc and iodine are especially relevant for normal skin, and vitamin C additionally supports normal collagen formation. Good fats from fish, nuts and plant oils also supply building blocks for the skin barrier. You're best off covering these nutrients through a varied diet.

Can I get rid of dry skin through diet alone?

Only to a degree. Diet forms the foundation for normal skin, but dry skin often has external causes such as heated air, cold or overly frequent hot showers. Without suitable basic care and without addressing these triggers, a change in diet usually isn't enough on its own.

Do omega-3 capsules help against dry skin?

Approved claims exist for omega-3 fatty acids regarding the heart, brain and vision, but there's no specific skin claim. Fats are indeed a fundamental building block of the skin's lipid film, but a direct effect of capsules on dry skin can't be derived from that. Oily sea fish and plant oils belong in a balanced diet regardless.

Is drinking important for skin hydration?

Adequate fluid intake supports the whole metabolism and is part of a healthy daily routine. In healthy people, though, lack of water is rarely the actual cause of dry skin — that usually lies in a disrupted skin barrier. So drinking a lot alone doesn't automatically make dry skin supple.

When should I see a doctor about dry skin?

If your skin stays very dry despite good care, itches strongly, is reddened or weeping, or changes suddenly, a medical assessment makes sense. It's also worth seeing a doctor for accompanying symptoms like fatigue or weight changes, since skin or metabolic conditions can be behind it.