Dry skin is not just about feeling tight or flaky — it is a barrier function problem. The outermost layer of the skin is not retaining moisture properly, either because of genetics, environment, or a depleted lipid matrix. The right ingredients target this directly: they attract water, hold it in, and repair the structural gaps in the barrier that are letting it escape.
- Dry skin is fundamentally a barrier problem, not just a hydration one — ceramide levels are measurably lower in dry, damaged skin, which is why replacing them topically works structurally, not just cosmetically.
- Glycerin penetrates into the outer skin layers and binds water there, unlike high-molecular-weight hyaluronic acid, which mostly sits on the surface — it's the single most common ingredient in dermatologist-recommended moisturizers for good reason.
- In very low humidity, even hyaluronic acid can pull moisture from deeper skin layers toward the surface faster than it evaporates gradually — sealing with a moisturizer matters more in dry climates than humid ones.
- Heavier emollients and occlusives (shea butter, squalane, plant oils) aren't optional extras for very dry skin — they're what prevents the overnight moisture loss that undoes everything applied underneath.
- Daily exfoliation on already-dry skin is counterproductive — a weekly gentle acid is usually enough, and stripping cleansers do more harm than the dryness they're meant to address.
Ceramides — the essential barrier repair ingredient
Ceramides are lipid molecules that make up roughly 50% of the skin barrier's lipid matrix. In dry and damaged skin, ceramide levels are measurably lower than in healthy skin. Replacing them topically — using a ceramide-containing moisturiser — directly rebuilds the barrier, reduces transepidermal water loss, and prevents the tight, itchy feeling that characterises dry skin. Look for ceramide NP, AP, or EOP in the ingredients list, ideally combined with cholesterol and fatty acids for a complete lipid mix.
Glycerin — the most reliable humectant
Glycerin is inexpensive, heavily researched, and highly effective for dry skin. Unlike hyaluronic acid, which mostly sits on the surface, glycerin penetrates into the outer layers of the skin and binds water there. It also has a direct effect on barrier function, helping skin cells retain moisture at the structural level. It is the single most common ingredient in dermatologist-recommended moisturisers and should be a staple for anyone with dry skin.
Squalane — the ideal dry-skin emollient
Squalane is a stable, lightweight oil derived from sugarcane or olives (or historically shark liver — avoid that). It closely resembles the skin's own sebum lipids and is absorbed without greasiness. As an emollient, it fills in the spaces between skin cells, softening rough texture and preventing moisture from evaporating. It is non-comedogenic, well tolerated by even sensitive skin, and works beautifully as the last step in a dry-skin routine or mixed into a moisturiser.
Panthenol — the calming, repairing B vitamin
Panthenol (provitamin B5) converts to pantothenic acid in the skin, where it promotes wound healing, stimulates cell turnover, and acts as a powerful humectant. It reduces inflammation, relieves itching, and accelerates barrier recovery — making it particularly valuable for dry skin that is also reactive or frequently irritated. It is found in many healing creams and is an excellent complement to ceramides.
Shea butter and plant oils
For very dry skin, heavier emollients and occlusives are necessary to prevent overnight moisture loss. Shea butter is rich in oleic and stearic acids and forms a semi-occlusive layer on the skin. Jojoba oil mimics sebum and absorbs cleanly. Rosehip oil provides linoleic acid, which is often depleted in dry skin. Applied as the last step at night, these create a physical barrier that traps hydration applied underneath.
What to avoid
- Fragrance and essential oils: Even natural fragrances irritate a compromised barrier and worsen dryness.
- High-concentration AHAs used daily: Exfoliation is fine occasionally, but daily use on dry skin strips the barrier further.
- Foaming cleansers with high surfactant loads: These strip natural oils. Swap for cream or oil cleansers.
- Alcohol-denat in leave-on products: Drying and barrier-disruptive at concentrations used in some toners.
- Very high-MW hyaluronic acid in dry climates: Can pull moisture from deeper skin layers if the air is very dry and nothing seals it in.
A simple routine for dry skin
- AM: Cream cleanser → glycerin + panthenol serum → ceramide moisturiser → SPF.
- PM: Oil or balm cleanser → rich ceramide moisturiser → squalane oil or shea butter on top.
- Weekly: A gentle lactic acid (5–10%) exfoliant to clear dry skin buildup without stripping.
Frequently asked questions
What is the single most important ingredient for dry skin?
Ceramides, because dry and damaged skin measurably has lower ceramide levels than healthy skin, and replacing them topically directly rebuilds the barrier structure rather than just adding temporary surface moisture. Look for ceramide NP, AP or EOP, ideally combined with cholesterol and fatty acids for a complete lipid mix.
Is glycerin or hyaluronic acid better for dry skin?
Glycerin is generally the safer, more reliable choice for dry skin, since it penetrates into the outer skin layers and binds water there, while high-molecular-weight hyaluronic acid mostly sits on the surface and needs sealing to avoid pulling moisture from deeper layers in dry air. Both work well together when HA is sealed properly with a moisturizer.
Can hyaluronic acid make dry skin worse?
In low humidity or on completely dry skin, yes — it can pull water from deeper skin layers toward the surface faster than dry air lets it evaporate gradually. Applying it to damp skin and always sealing with a moisturizer avoids this, and is especially important for dry skin in dry climates or heated indoor air.
How often should dry skin be exfoliated?
Weekly is usually enough — a gentle lactic acid at 5-10% clears buildup without stripping an already-compromised barrier. Daily exfoliation on dry skin is counterproductive, removing lipids faster than the barrier can replace them and worsening the dryness it's meant to address.
Should I use an oil or a cream for very dry skin at night?
Both, layered rather than chosen between — a ceramide-rich moisturizer applied first for structural repair, then squalane oil or shea butter on top as an occlusive seal to prevent overnight moisture loss. Heavier emollients aren't optional extras for very dry skin; they're what keeps everything applied underneath from evaporating away.
Sources & further reading
- "Clinical significance of the water retention and barrier function-improving capabilities of ceramide-containing formulations: A qualitative review" — PubMed
- "The influence of a cream containing 20% glycerin and its vehicle on skin barrier properties" — PubMed
This article is written and edited by the Pure Moonlight team, grounded in the peer-reviewed and clinical sources listed above and cross-checked against our ingredient analyzer's database. It is not a substitute for advice from a dermatologist or doctor.