VOLUME THREE — SKIN INGREDIENTS
Article 4: Niacinamide

Niacinamide Explained: What Vitamin B3 Actually Does for Your Skin

“Some ingredients push the skin to change. Niacinamide helps give the skin what it needs to function better.”

Niacinamide has become one of skincare’s most popular ingredients.

You’ll find it in serums, moisturisers, cleansers, brightening products, acne formulas and barrier creams — often at increasingly high concentrations.

But unlike many ingredients that become popular largely through trends, niacinamide has a substantial body of research behind it.

It can help support the skin barrier, improve the appearance of uneven pigmentation, influence oil production and support several aspects of healthy skin ageing.

But there’s also a problem.

As niacinamide has become more popular, concentrations have become higher and higher: 5%. 10%. 15%. Even 20%.

That can create the impression that more niacinamide automatically means better results.

It doesn’t.

Understanding niacinamide means understanding what it does — and why a thoughtfully formulated product can matter far more than chasing the largest percentage on the bottle.

What Is Niacinamide?

Niacinamide — also called nicotinamide — is a form of Vitamin B3.

It is water soluble and relatively stable, making it a versatile ingredient for cosmetic formulations.

Within the body, Vitamin B3 contributes to the formation of important coenzymes, including NAD and NADP, which are involved in cellular energy and numerous biological processes.

You don’t need to understand the biochemistry to appreciate the practical point:

Niacinamide supports several processes that healthy skin relies upon to function normally.

And that’s why one ingredient can be useful across surprisingly different skin concerns.

What Does Niacinamide Actually Do?

1. Supports the Skin Barrier

This is perhaps the benefit we value most.

Your outer skin barrier relies on an organised mixture of skin cells and lipids — including ceramides, cholesterol and fatty acids — to retain moisture and protect against the outside environment.

Niacinamide has been shown to support epidermal barrier function, including processes involved in the production of barrier lipids.

This can help the skin retain moisture and become more resilient.

It can be particularly useful within routines for:

• dry or dehydrated skin
• compromised skin barriers
• sensitive or reactive skin
• ageing skin
• people using active skincare
• skin needing additional barrier support
• That doesn’t mean niacinamide single-handedly “repairs” every compromised barrier.
• Barrier health depends on the entire routine.

However niacinamide can be an excellent supporting ingredient.

2.  Helps Improve Uneven Pigmentation

Niacinamide has an interesting relationship with pigmentation.
Melanin is produced by cells called melanocytes and packaged into structures known as melanosomes.

These melanosomes are then transferred to surrounding keratinocytes. Research suggests niacinamide can help reduce this transfer process, which can gradually improve the appearance of hyperpigmentation and uneven skin tone.

This makes it useful within routines targeting:

• post-inflammatory pigmentation
• sun-related discolouration
• uneven skin tone
• areas of excess pigmentation
• overall skin clarity

But pigmentation is complex.

Melasma, post-inflammatory pigmentation and sun-related pigmentation do not necessarily behave in the same way.

So niacinamide isn’t a standalone solution for every type of pigmentation.
It’s one useful tool within a broader pigmentation strategy.

3. Can Help Regulate Oil Production

One of niacinamide’s interesting qualities is that it can be appropriate for skin that is both oily and dehydrated.

These conditions can absolutely coexist.

Clinical research suggests topical niacinamide may help reduce certain measures of facial sebum production.

This can make it useful for:

• oily skin
• combination skin
• congestion-prone skin
• some acne-prone skin
  

Importantly, niacinamide doesn’t work by aggressively stripping oil from the skin’s surface.

And that’s a distinction we think matters.

Sometimes oily skin doesn’t need more stripping, exfoliating or drying.

It needs better balance and a healthier barrier.

4. Helps Support Red or Reactive Skin

Niacinamide is commonly incorporated into products designed for sensitive and redness-prone skin.

Part of its usefulness comes back to barrier health.
When the skin barrier is compromised, the skin may become more vulnerable to irritation and environmental triggers.

By supporting barrier function, niacinamide can help create a more resilient skin environment.

Clinical studies have also reported improvements in visible red blotchiness with topical niacinamide.

However, niacinamide isn’t a medical treatment for conditions such as:

• rosacea
• eczema
• perioral dermatitis
  

These conditions may require appropriate diagnosis and medical management.

And importantly, even niacinamide can irritate some very reactive skins, particularly in higher-strength formulas.

5. Supports Healthy Skin Ageing

Niacinamide isn’t usually spoken about in the same way as Vitamin A when we discuss skin ageing.

But that doesn’t make it unimportant.

Clinical research using topical niacinamide has reported improvements in several visible characteristics of ageing skin, including:

• fine lines and wrinkles
• hyperpigmented spots
• skin texture
• red blotchiness
• sallowness
  

There is also a broader point here.

Healthy ageing isn’t simply about stimulating as much collagen as possible.

Maintaining:

barrier integrity + hydration + even pigmentation + controlled inflammation + healthy skin function matters enormously too.

Niacinamide fits particularly well into this more holistic approach to ageing skin.

Does Niacinamide Exfoliate?

No — not in the way an AHA or BHA does.

Niacinamide is not an exfoliating acid.

t doesn’t need to remove surface skin cells to produce its benefits.

This is one reason it can complement stronger active ingredients so well.

You can support healthier skin function without continually increasing exfoliation.

And for many skins, that’s exactly what’s needed.

What Percentage of Niacinamide Do You Actually Need?

This is where skincare marketing has complicated an otherwise excellent ingredient.

Consumers have become accustomed to comparing percentages:

5% vs 10% vs 15% vs 20%.

But a higher number doesn’t automatically mean a better result.

Clinical benefits have been demonstrated with relatively modest concentrations of niacinamide, including around 2–5% for particular outcomes.

Higher concentrations may suit some people, but there isn’t good reason to assume that 20% will simply deliver four times the benefit of 5%.

Skin biology doesn’t work like that.

And increasingly concentrated formulas may be more likely to cause some people:

• stinging
• redness
• itching
• dryness
• irritation
  

So just as we discussed with Vitamin C:

Percentage is only one part of formulation.

The concentration, delivery system, supporting ingredients and condition of your skin all matter.

Can Niacinamide Cause Breakouts?

Niacinamide isn’t generally considered an inherently pore-clogging ingredient.

But someone can still react to a product containing niacinamide.

Why?

Because you’re never really applying one ingredient.

You’re applying a complete formulation that may contain:

• emulsifiers
• preservatives
• oils
• silicones
• botanical ingredients
• fragrances
• other active ingredients
  

Very high concentrations of niacinamide may also simply be uncomfortable for some skins.

If you introduce a niacinamide product and develop persistent:

redness, itching, burning, bumps or irritation, don’t automatically assume your skin is “purging.”

Niacinamide doesn’t require a purge before it works.

Stop, simplify and reassess what you’re using.

Niacinamide vs Niacin

These terms are sometimes used interchangeably, but they aren’t quite the same.

Both are forms of Vitamin B3.

However:

Niacinamide = nicotinamide

Niacin = nicotinic acid

Niacin can cause vasodilation and the characteristic “niacin flush.”

Niacinamide is the form much more commonly used in modern skincare.

What Works Well Alongside Niacinamide?

One of niacinamide’s biggest advantages is how easily it fits into a skincare routine.

Ceramides - An excellent combination for supporting barrier function and reducing moisture loss.

Hyaluronic Acid - Hyaluronic acid helps attract and retain water, while niacinamide provides complementary barrier support.

Vitamin C - Yes — Vitamin C and niacinamide can be used together. The old skincare rule claiming that the two ingredients universally “cancel each other out” isn’t a useful rule for modern cosmetic formulations.

Vitamin A - Another excellent pairing. Niacinamide’s barrier-supportive properties can make it particularly useful within routines containing retinoids.

Peptides - Peptides and niacinamide can comfortably coexist within healthy-ageing and barrier-supportive routines.

Azelaic Acid - This can be an interesting combination for skin experiencing pigmentation, redness and blemishes, where appropriate and tolerated.

PDRN / Polynucleotides and Exosome-Based Skincare - These newer regenerative approaches occupy a different role within skincare. It would be premature to claim that niacinamide somehow boosts PDRN, polynucleotides or exosomes. We don’t have good evidence for that claim.

But they may coexist within an appropriately designed routine because they target different aspects of skin support.

Not every beneficial ingredient needs to enhance every other ingredient. Sometimes they simply have different jobs.

Niacinamide + Vitamin C: Let’s Retire This Myth

For years, skincare advice frequently warned:

Never use Vitamin C and niacinamide together.

This advice largely originated from older chemistry concerns that don’t translate neatly to modern cosmetic formulations or normal skincare use.

Well-designed products can contain both.

And the two ingredients can certainly exist within the same overall skincare routine.

You don’t necessarily need to separate them into morning and evening routines.

What matters far more is:

formulation + concentration + your skin barrier + tolerance + everything else you’re using.

Who May Benefit From Niacinamide?

One reason niacinamide is so useful is its versatility.

• Dry or Dehydrated Skin - For additional barrier support.
• Oily Skin - To help support balanced sebum production.
• Acne-Prone Skin - As part of a routine supporting oil balance, barrier function and post-inflammatory pigmentation.
• Pigmentation - To help improve uneven tone and reduce melanosome transfer.
  Sensitive Skin
• For barrier support — when tolerated.
• Ageing Skin - To support barrier function, pigmentation, texture and overall skin quality.
• People Using Active Skincare - As a complementary ingredient alongside ingredients such as Vitamin A.
  

That’s a remarkably broad profile for one ingredient.

Who Should Be More Careful?

“Gentle” doesn’t mean universally tolerated.

We would still introduce niacinamide cautiously if someone has:

• extremely reactive skin
• an active dermatitis flare
• perioral dermatitis
• a significantly compromised barrier
• multiple strong actives already in their routine
  

And this is where listening to your skin matters.

If a 10% or 20% niacinamide serum repeatedly causes irritation while your skin is perfectly happy with a lower-strength formulation, there’s no advantage in persevering simply because the number is higher.

The best concentration is not necessarily the highest one.

It’s the one your skin can use consistently and comfortably.

Choosing Niacinamide for Your Skin

The ingredient itself is only part of the decision.

Consider:

1. What concentration is being used?
2. What else is in the formulation?
3. Is niacinamide already present elsewhere in your routine?
4. What skin concern are you actually trying to address?
5. What condition is your skin barrier currently in?
6. Someone with oily, resilient skin may have very different needs from someone with dry, reactive or compromised skin.
7. And if your cleanser, serum and moisturiser already contain niacinamide, adding another dedicated high-strength B3 serum may accomplish very little.

The goal isn’t to use every beneficial ingredient. It’s to use the ingredients your skin actually needs.

The Skin Code Perspective™

Niacinamide represents something we strongly believe about skincare:

An ingredient doesn’t have to be aggressive to be effective.

At The Skin Code, we’re interested in what the skin needs to function well — not simply how many powerful actives we can fit into a routine.

When considering niacinamide, we look at:

1. Your current barrier health
   2. Oil production and congestion
   3. Pigmentation and inflammation
   4. Other active ingredients you’re already using
   5. The concentration and complete formulation
   6. Whether your skin actually tolerates it
   

For one person, niacinamide might simply sit within their moisturiser.

For another, a dedicated niacinamide serum may make sense.

And for someone already using several products containing it, more isn’t necessarily going to achieve more.

“Good skincare isn’t about collecting active ingredients. It’s about understanding what your skin needs — and choosing formulations that support it.”

Key Takeaways

✓ Niacinamide is a form of Vitamin B3 with a wide range of applications in skincare.
✓ It can support skin barrier function, pigmentation, oil balance and several visible signs of skin ageing.
✓ Clinical benefits have been demonstrated at relatively modest concentrations — higher isn’t automatically better.
✓ Niacinamide isn’t an exfoliating acid and doesn’t need to cause “purging.”
✓ It can be used alongside both Vitamin C and Vitamin A.
✓ Sensitive or compromised skin can still react to niacinamide, particularly in stronger formulations.
✓ The complete formulation matters more than simply choosing the biggest percentage.
✓ Before adding another niacinamide product, check whether it’s already present elsewhere in your routine.

Not Sure What Your Skin Needs?

Ingredient choice is only one part of building an effective skincare routine.

A professional skin assessment can help identify your skin’s priorities, assess your current barrier health and determine which ingredients — and which formulations — actually belong in your routine.

Because healthy skin isn’t created by using more.

It’s created by understanding what your skin needs and supporting it consistently.

Continue Your Skin Ingredient Journey

Niacinamide shows us that some of skincare’s most valuable ingredients don’t need to aggressively resurface or stimulate the skin. Sometimes supporting the way skin functions is just as important as pushing it to change.

Next we will look at Ceramides and explain how lipids support your skin barrier.