Ingredients & Science

Is Niacinamide the Same as Vitamin B3?

The short answer is yes, with a qualification that turns out to matter more than you might expect. Niacinamide is a form of vitamin B3, but vitamin B3 is not a single compound, and the differences between its forms have real consequences for how they behave on skin.

Vitamin B3 is not one substance but a small family of related compounds, which is why labels can be confusing.

Niacinamide and niacin are both vitamin B3, but they behave differently enough that confusing them leads to misconceptions, particularly around flushing.

So is niacinamide the same as vitamin B3, and does the distinction matter?

It is a bit like asking whether a sedan is a car: yes, but so is a pickup truck, and they are not interchangeable.

Quick answerNiacinamide is a form of vitamin B3, also known as nicotinamide.

Medically reviewed by Dermatology reviewer · Updated Sep 11, 2026 · 4 min read

Short AnswerYes, a form

Also CalledNicotinamide

Related ToNiacin

Key DifferenceNo flushing

EvidenceGood

Key answer

A form of it

Niacinamide is a form of vitamin B3, distinct from niacin in its effects.

Evidence: Moderate - A form of it
Best for: Understanding ingredient labels and terminology
Limitation: Those confusing it with niacin

See what the evidence shows

Short version

Story in brief

Vitamin B3 is a collective term for several related compounds, the most familiar being niacin (also called nicotinic acid) and niacinamide (also called nicotinamide). Both are forms of vitamin B3, and both are used in supplements and skincare, but they are not identical.

The main practical difference is flushing. Niacin can cause a sudden dilation of blood vessels, producing warmth and redness, particularly when taken orally. Niacinamide does not trigger that response, which is one reason it is the preferred form for topical skincare.

In skincare, niacinamide is valued for supporting the skin barrier, regulating oil production, and reducing inflammation. Its relationship to vitamin B3 matters mainly for understanding labels and avoiding confusion with niacin's effects.

Mental model

Visual explanation

Evidence

What the evidence shows

Niacinamide and niacin are both vitamin B3, but they are distinct compounds; the flushing story belongs to niacin, not niacinamide.

Strong fit means the advice is central to that goal.Depends means formula, tolerance, or context matters more.Use caution means do not treat it as the main answer.

If your goal is
A form of B3Usually relevant
Fit signal
Often useful
Yes
If your goal is
Also calledUse caution
Fit signal
Limited evidence
Nicotinamide
If your goal is
FlushingUsually relevant
Fit signal
Often useful
No
If your goal is
Related toUse caution
Fit signal
Limited evidence
Niacin

Practical use

How to use it

Check the label
Look for "niacinamide" or "nicotinamide" in skincare products.
Don't confuse it with niacin
Niacin is a different form of vitamin B3 with different effects.
Use niacinamide as directed
It is generally well tolerated for topical use.

Safety

Side effects and cautions

Using niacinamide and niacin interchangeably
They are related but distinct compounds with different effects.
Expecting niacinamide to cause flushing
Flushing belongs to niacin, not niacinamide.
Assuming vitamin B3 is a single ingredient
It is a family of compounds, which is why labels can be confusing.

Fit

Who should be careful

Those confusing it with niacin

Helpful context

What else is worth knowing

TypeWater-soluble vitamin

Also known asNicotinamide

Primary useBarrier support

FlushingNo

Worth noting

Small details that can change the answer

Category. Vitamin B3 is a family of compounds, not a single substance.
Two Forms. The main forms are niacin and niacinamide.
Flushing. Niacin can cause flushing; niacinamide does not.
Skincare Form. Niacinamide is the form commonly used in topical products.

Niacinamide is a form of vitamin B3, also called nicotinamide.

Vitamin B3 includes multiple compounds, including niacin and niacinamide.

Niacin can cause flushing; niacinamide does not.

Niacinamide is the form commonly used in skincare.

The distinction matters for understanding labels and effects.

Vitamin B3 is a group of water-soluble compounds that includes niacin (nicotinic acid), niacinamide (nicotinamide), and related derivatives. The body uses these forms to produce coenzymes involved in energy metabolism and cellular repair.

Niacin (nicotinic acid): associated with flushing
Niacinamide (nicotinamide): used in skincare, no flushing
Both are forms of vitamin B3

Niacin and niacinamide follow different pathways in the body. Niacin can trigger prostaglandin-mediated vasodilation, causing flushing. Niacinamide does not follow that pathway, which makes it the preferred form for topical use where flushing would be undesirable.

Vasodilation: The widening of blood vessels, which increases blood flow and can cause warmth and redness.
Nicotinamide: Another name for niacinamide, the form of vitamin B3 commonly used in skincare.

MythNiacinamide and niacin are the same thing.Reality

They are both vitamin B3 but distinct compounds with different effects.

MythNiacinamide causes flushing.Reality

Flushing is associated with niacin, not niacinamide.

MythVitamin B3 is always one ingredient.Reality

It is a family of related compounds.

When a product lists niacinamide, it is using the form of vitamin B3 that is well tolerated topically and does not cause flushing. This is why niacinamide appears in barrier-supporting and oil-regulating products, while niacin is more commonly discussed in the context of oral supplements and flushing.