If you’ve spent any time browsing skincare ingredients, you’ve almost certainly come across niacinamide. It’s one of those actives that keeps showing up, in commercial serums, in formulator forums, and increasingly in home DIY labs. The reason is simple: niacinamide is genuinely one of the most beginner-friendly, broadly effective actives you can work with. Whether you’re building your first serum or refining an existing formula, this guide covers everything you need to know.

What Is Vitamin B3, and Why Does It Go by So Many Names?

Walk into a cosmetic ingredients supplier and you might see it listed as niacinamide. Search a European database and it might appear as nicotinamide. Browse a label and it shows up under Vitamin B3. It’s understandably confusing.

Nicotinamide vs Niacinamide vs Vitamin B3: Are They the Same Thing?

Yes, they are the same molecule. Niacinamide and nicotinamide are two accepted names for the same water-soluble form of Vitamin B3. The difference is purely regional and regulatory. “Niacinamide” is more common in cosmetic and North American contexts; “nicotinamide” is the preferred pharmaceutical and European term. Neither name signals a different ingredient or a different grade of quality.

When you’re sourcing for DIY, this matters because you won’t be misled by what’s on the label. If the INCI name reads Niacinamide, you’ve got the right thing regardless of what it says on the front of the packet.

At DIY Naturally, niacinamide is stocked as a cosmetic-grade water-soluble powder, ready to be weighed and added directly to the water phase of your formulas, no special equipment needed.

What Niacinamide Actually Does to Your Skin

Niacinamide is not a one-trick active. It works across several skin concerns simultaneously, which is a big part of why it’s become such a staple.

Key Skin Benefits at a Glance

Brightens uneven skin tone, it interferes with the transfer of melanin to skin cells, which visibly reduces the appearance of dark spots and hyperpigmentation over time.
Minimises the appearance of pores, it doesn’t shrink pores (nothing can permanently change pore size), but it reduces their visibility by improving skin texture and controlling sebum.
Supports the skin barrier, niacinamide boosts the synthesis of ceramides and other lipids that keep the barrier intact and moisture locked in.
Reduces redness, it has a calming, anti-inflammatory effect that makes it useful for reactive and sensitised skin.
Manages excess sebum, particularly relevant for oily and combination skin types, where it helps regulate oil production without stripping the skin.

Research in cosmetic dermatology has shown that niacinamide delivers visible improvements in skin tone and barrier function at concentrations as low as 2%, with most leave-on formulas sitting in the 2–5% range for daily use.

Who Is Niacinamide Best Suited For?

Niacinamide is one of the most well-tolerated cosmetic actives available. It suits oily, combination, sensitive, and rosacea-prone skin, practically all skin types benefit from it at appropriate percentages. It’s one of the few actives where you don’t need to patch-test as cautiously as you would with, say, AHAs or retinoids, though a patch test is always a sensible habit.

How to Use Niacinamide in DIY Skincare Formulas

Getting niacinamide into a formula is straightforward, but there are a few formulation basics worth knowing before you start.

Recommended Usage Rates

2–5%, the most common range for daily leave-on products like serums, toners, and moisturisers. Effective for most skin types and skin concerns.
5–10%, occasionally used in targeted treatments, but higher concentrations can cause temporary flushing in some people, particularly those with reactive skin.

For beginners, starting at 4–5% gives you a genuinely effective active dose without pushing into territory that risks irritation. Weigh your ingredients by percentage rather than volume, it’s more accurate and makes scaling your batch much easier. If you’re new to this approach, our beginner’s guide to skincare formulation walks through the fundamentals clearly.

Which Products Can You Add Niacinamide To?

Because niacinamide is water-soluble, it belongs in the water phase of your formula. Dissolve it in your water (or hydrosol) before adding any thickeners, emulsifiers, or oil-phase ingredients. It will not dissolve in oils or butters.

It works well in:

Water-based serums, its natural home; easy to formulate and highly effective
Toners and essences, a simple addition to a basic toner base
Moisturisers and face creams, works in emulsions as long as it’s added to the water phase; consider adding niacinamide to a homemade face cream once you’re comfortable with emulsion basics
Sheet mask solutions, dissolves readily in the water base

One format it doesn’t suit is anhydrous (water-free) products like balms or body butters, with no water phase, there’s nowhere for it to go.

Pairing Niacinamide With Other Actives

Niacinamide is one of the most cooperative actives in a formulator’s toolkit. It layers well with a wide range of ingredients without destabilising a formula or causing unwanted reactions.

Humectants are a natural pairing. Hyaluronic acid adds deep hydration while niacinamide works on tone and texture, the two together make a well-rounded serum base. Betaine as a gentle humectant partner is another excellent option, particularly for sensitive skin formulators, as it adds moisture-binding properties without any heaviness.

Antioxidants like Vitamin E complement niacinamide well. Niacinamide handles barrier support and tone; Vitamin E protects the skin from oxidative stress. For more detail on how Vitamin E works as an antioxidant active in DIY formulas, read up before you combine the two.

Soothing botanicals, think chamomile extract, centella asiatica, or allantoin, sit easily alongside niacinamide and reinforce its calming effect, especially in formulas for reactive skin.

What about Vitamin C? This is the most common concern beginners raise, and the worry is largely overstated. The long-held myth that niacinamide and Vitamin C react badly together comes from older research showing that the two could theoretically form nicotinic acid (which causes skin flushing). In practice, cosmetic chemists have broadly established that at the concentrations used in modern formulas, and at the pH ranges typical of cosmetic products, this reaction is negligible. Combining them at normal usage rates, say, 4% niacinamide with 10% ascorbic acid, is not a formulation risk you need to avoid.

A Simple DIY Niacinamide Serum Recipe

Water-based niacinamide serums are among the most commonly formulated DIY active projects for beginners, and for good reason. They involve a single phase, minimal equipment, and a short ingredients list.

Here’s a simple starting formula (all percentages by weight):

Ingredient	%
Distilled water	83.5%
Glycerin	5%
Niacinamide powder	5%
Sodium hyaluronate (LMW)	0.5%
Allantoin	0.5%
Broad-spectrum preservative	1%
pH adjuster (e.g. citric acid solution)	to pH 5.5–6.5

Method:

Weigh all water-phase ingredients, distilled water, glycerin, niacinamide, sodium hyaluronate, and allantoin, into a clean beaker.
Stir gently until the niacinamide powder is fully dissolved. It dissolves readily in room-temperature water; no heat required.
Add your preservative and stir again.
Check and adjust pH to between 5.5 and 6.5. Niacinamide is stable across a fairly wide pH range, but keeping within this window ensures your preservative also works correctly.
Transfer to a clean, sanitised pump or dropper bottle.

A few non-negotiables: always weigh by percentage, always preserve aqueous formulas, and always check pH. Choosing the right preservative for aqueous formulas is one of the most important decisions in water-based formulation, don’t skip it.

If you want a more skin-feel-forward serum, you can explore natural alternatives to silicone that work well alongside actives to add slip or a velvety finish without synthetic silicones.

Common Mistakes to Avoid When Formulating with Niacinamide

Every formulator makes mistakes, that’s how you learn. But a few are worth flagging so you can sidestep them early.

Using too high a concentration. Going above 5% in a leave-on formula isn’t necessary for most skin concerns, and pushing toward 10% without reason can cause temporary flushing in some people. Start at 4–5% and see how your skin responds before going higher.

Forgetting to preserve. Any formula that contains water can grow bacteria, yeast, and mould. This includes your beautiful, simple niacinamide serum. A broad-spectrum preservative at the recommended usage rate is not optional, it’s what keeps your product safe to use.

Not checking pH. Niacinamide is relatively pH-stable, but your preservative likely isn’t. Many preservative systems stop working effectively outside a specific pH window. Get yourself a set of pH strips or, better, a calibrated pH meter.

Dissolving it in the wrong phase. Niacinamide won’t dissolve in oil. If you add it to a butter or oil blend and wonder why it’s clumping, that’s why. Always add it to the water phase first.

Using tap water. Tap water contains minerals and microorganisms that can affect your formula’s stability and shelf life. Always use distilled or deionised water in aqueous formulas.

None of these are dealbreakers, they’re fixable, and every experienced formulator has made at least one of them. The key is building good habits from the start.

Ready to try it yourself? Cosmetic-grade niacinamide powder is available in the DIY Naturally shop, weighed, labelled, and ready for your next formula. Pick up some betaine as a gentle humectant partner and Vitamin E to round out your beginner serum kit, and you’ll have the foundation of a genuinely effective, skin-nourishing formula made entirely by you.