Niacinamide and hyaluronic acid: order, concentration and when it’s worth it

INGREDIENT COMBINATIONS

Can you use niacinamide and hyaluronic acid together?

Yes, niacinamide and hyaluronic acid can be combined without restriction, because there is no conflict between them – neither chemically nor in terms of how your skin tolerates them. The idea that active ingredients cancel each other out on the skin usually comes from laboratory conditions that have little to do with a finished formulation. Niacinamide is a form of vitamin B3; hyaluronic acid is a humectant. They work in completely different places and therefore do not get in each other’s way. In practice, you will rarely find them apart anyway, because most serums contain several active ingredients at once and a good formulation already takes the combination into account. That is exactly how we built The Duo, a serum and a cream, rather than selling you two single ingredients that you then have to balance against each other yourself. So the real question is not whether, but in what order and in what amounts you apply them.

What do niacinamide and hyaluronic acid each do?

Hyaluronic acid provides instant moisture at the surface, while niacinamide works slowly on the skin barrier. Hyaluronic acid is a sugar molecule that binds many times its own weight in water. When you apply it, your skin looks plumper within minutes and fine dehydration lines are less noticeable. The effect lasts exactly as long as you keep renewing it. Niacinamide takes a different route and acts on lipid production in the stratum corneum, the skin’s outermost layer. According to a study in the British Journal of Dermatology, topically applied nicotinamide increases the ceramide and fatty acid content of the stratum corneum and reduces water loss in dry skin. This is not an instant effect but a gradual build-up over several weeks. For you, that means hyaluronic acid disguises, niacinamide changes. With an unsettled complexion and blemishes, it is therefore niacinamide that makes the difference over time, not moisture alone.

Hyaluronic acid or niacinamide first: which order is right?

Hyaluronic acid first, then niacinamide – provided the two are in separate products. With niacinamide and hyaluronic acid, the order is decided not by the ingredient but by the texture: the thin serum first, then the richer cream. A serum absorbs quickly; a cream contains lipids and settles on top. If you apply the cream first, the serum will barely get through. If the hyaluronic acid is in the serum, this sequence has an added advantage: it attracts water, and the cream on top stops the moisture evaporating again. Without anything sealing it in, hyaluronic acid can, in dry indoor air, even draw moisture up from deeper layers of the skin, which makes tightness worse rather than relieving it. You do not need to wait between steps until everything has fully absorbed. In fact, the cream spreads better on slightly damp skin. You can see how this works with our products in the step-by-step guide to using them.

If both ingredients are in both products, the question does not arise. The same order applies morning and evening. If you are wondering whether you need both at all, see which of the two ingredients suits your skin.

Which concentrations of niacinamide and hyaluronic acid make sense?

For niacinamide, the usual cosmetic range is between 2 and 10%; for hyaluronic acid, between 0.5 and 2%. More is not better here. Above around 10% niacinamide, many people report tingling or redness without any documented additional benefit, and we have worked out separately the point at which high percentages tip over. With hyaluronic acid, the limit is a practical one: above 2%, the texture becomes sticky, and your skin cannot bind more water just because there is more humectant sitting on it. What matters more than the number itself is whether a brand states the concentration at all. A great many do not, and simply put the ingredient’s name on the front. Our Duo for CHF 109.90 contains 5% niacinamide and 2% hyaluronic acid, and these figures always refer to the serum and cream together. We have disclosed all other figures on our page about ingredients and their concentrations.

What else can you combine them with?

With almost everything found in a normal routine, including vitamin C, bakuchiol and ceramides. The old warning that niacinamide and vitamin C neutralise each other goes back to experiments with pure ascorbic acid under heat and cannot be applied to modern formulations. We deliberately use 3-O-ethyl ascorbic acid, a more stable form of vitamin C that works in the same pH range as niacinamide. If you are interested in the order of these two, you will find it here: whether vitamin C or niacinamide goes on first. Caution is only called for with strong acids and high-strength retinol – not because of a conflict with niacinamide or hyaluronic acid, but because they already put your skin under strain on their own. Plant extracts can also sit alongside without any problem, for example gentian root extract and what it does in a formula, which is in the Duo at 2%.

When is the combination not the answer?

If your skin is acutely irritated, an extra active ingredient will not help – what helps first is less. Skin that burns, flakes or reacts to every product with redness usually has an overloaded skin barrier. In that state, a simple moisturiser with few actives is a better choice than a combination of two active substances. Give your skin two to three weeks’ rest, then reintroduce the active ingredients one at a time. To be equally honest: if your skin is happy at the moment and there is nothing specific you want to address, you need neither extra niacinamide nor extra hyaluronic acid. A good moisturiser is then perfectly sufficient. And if there is a medical condition behind the way your skin looks – persistent inflammation, severe acne or redness that will not go away – that is one for a dermatologist. Skincare cares for and stabilises the skin; it is no substitute for a medical assessment.

Frequently asked questions