What Does Niacinamide Do For Your Skin? The Complete Guide

If there is one skincare ingredient that has taken the beauty world by storm in recent years it is niacinamide. You will find it in serums, moisturisers and toners across every price point — but what does niacinamide actually do for your skin, and is it worth the hype?

In this complete guide we break down exactly what niacinamide is, what it does, who it is suitable for and how to get the most from it in your skincare routine.

What is Niacinamide?

Niacinamide is a form of Vitamin B3 — a water soluble vitamin that your body needs but cannot produce on its own. When applied topically to the skin it works on multiple levels simultaneously, making it one of the most versatile and well researched active ingredients in modern skincare.

Unlike some active ingredients that target one specific concern, niacinamide addresses multiple skin issues at once — which is why it has become such a staple in so many skincare routines.

What Does Niacinamide Do For Your Skin?

Strengthens the Skin Barrier

Your skin barrier is the outermost layer of your skin and its job is to keep moisture in and harmful things out. Niacinamide stimulates the production of ceramides — the lipids that hold your skin barrier together — resulting in stronger, more resilient skin that holds onto moisture better and is less reactive to environmental stressors.

Reduces Pore Appearance

One of the most popular reasons people reach for niacinamide is its ability to visibly reduce the appearance of enlarged pores. By regulating oil production and improving skin elasticity, niacinamide helps pores appear smaller and skin look more refined over time.

Controls Oil Production

If you struggle with oily or combination skin, niacinamide helps regulate sebum production — meaning less shine, fewer breakouts and a more balanced complexion throughout the day.

Fades Dark Spots and Hyperpigmentation

Niacinamide inhibits the transfer of pigment within the skin, which means it gradually fades dark spots, post-acne marks, sun damage and uneven skin tone with consistent use. This makes it particularly effective when combined with other brightening ingredients.

Reduces Redness and Inflammation

Niacinamide has powerful anti-inflammatory properties, making it ideal for sensitive skin, rosacea-prone skin and anyone who experiences redness or irritation. It calms the skin and reduces blotchiness for a more even complexion.

Fights Fine Lines and Wrinkles

By boosting collagen production and strengthening the skin barrier, niacinamide helps improve skin elasticity and firmness over time. The result is a visible reduction in fine lines and a plumper, more youthful looking complexion.

Protects Against Environmental Damage

Niacinamide has antioxidant properties that help protect skin cells from damage caused by pollution, UV rays and other environmental stressors — making it a brilliant ingredient for everyday use.

What Percentage of Niacinamide Do You Need?

This is one of the most common questions about niacinamide and the answer depends on what you are trying to achieve:

2% niacinamide — gentle introduction, good for very sensitive skin 5% niacinamide — the sweet spot for most skin concerns including pores, oiliness, redness and early signs of ageing 10% niacinamide — higher strength for more stubborn concerns, though can cause flushing in some skin types

Our Lacus Temporis Pro Collagen Serum contains 5% niacinamide — clinically recognised as the most effective concentration for the widest range of skin types and concerns, delivering visible results without the risk of irritation.

Who is Niacinamide Suitable For?

The brilliant thing about niacinamide is that it works for virtually every skin type:

• Oily skin — regulates sebum and minimises pores
• Dry skin — strengthens barrier and improves moisture retention
• Sensitive skin — reduces redness and inflammation gently
• Combination skin — balances without over-drying
• Mature skin — firms, plumps and reduces fine lines
• Acne-prone skin — calms breakouts and fades post-acne marks

It is also safe to use during pregnancy, making it one of the few active ingredients that expectant mothers can continue using confidently.

Can You Use Niacinamide With Other Ingredients?

Yes — and this is one of niacinamide’s greatest strengths. It plays well with almost everything:

Niacinamide and Hyaluronic Acid — a powerhouse combination for hydration and barrier repair. These two ingredients complement each other perfectly and are both found in our Lacus Temporis serum.

Niacinamide and Tranexamic Acid — an incredibly effective brightening duo that tackles dark spots and uneven skin tone from two different angles simultaneously. Again, both are in Lacus Temporis.

Niacinamide and Retinol — niacinamide helps counteract the irritation that retinol can cause, making them a smart pairing for anti-ageing routines.

Niacinamide and Vitamin C — a much debated combination but modern formulations have shown these can work well together when the pH levels are balanced correctly.

How to Use Niacinamide in Your Skincare Routine

Niacinamide is best applied as a serum after cleansing and toning, before heavier moisturisers. Here is a simple routine:

1. Cleanse your skin thoroughly to remove makeup, SPF and impurities
2. Apply your toner
3. Apply 2-3 drops of your niacinamide serum to face and neck
4. Gently press into skin — do not rub
5. Follow with moisturiser
6. Apply SPF every morning

Niacinamide can be used both morning and evening and does not make your skin sun sensitive, unlike some other actives such as AHAs or retinol.

How Long Does Niacinamide Take to Work?

This is important to set realistic expectations:

• 2-4 weeks — improved hydration and skin texture
• 4-8 weeks — visible reduction in redness, pores and oiliness
• 8-12 weeks — noticeable fading of dark spots and improvement in fine lines

Consistency is everything with niacinamide. Use it daily and give it at least 8 weeks before judging the results.

Why We Chose 5% Niacinamide for Lacus Temporis

At Luna Selene we spent a long time researching the right concentration and formulation for our Lacus Temporis Pro Collagen Serum. We chose 5% niacinamide because it sits in the sweet spot — effective enough to deliver visible results across multiple skin concerns, yet gentle enough for sensitive and reactive skin types.

Combined with 3% Tranexamic Acid for brightening, Hyaluronic Acid for deep hydration and our unique upcycled postbiotic ingredient derived from the gin industry, the result is a serum that addresses fine lines, dark spots, dullness, enlarged pores and dehydration in one lightweight formula.

Free from parabens, synthetic fragrances, mineral oils and sulphates. 100% vegan and cruelty free. Award-winning. Made in the UK.

Lacus Temporis Pro Collagen Serum is available for £68 for 30ml.

[Shop Lacus Temporis Pro Collagen Serum here]

The Bottom Line

Niacinamide is not just a trend — it is one of the most well researched, versatile and effective skincare ingredients available today. Whether you want to reduce pores, fade dark spots, calm redness, control oil or simply have stronger healthier skin, niacinamide delivers.

The key is choosing the right concentration for your skin type and using it consistently as part of a daily routine.

At Luna Selene our Lacus Temporis Pro Collagen Serum combines 5% niacinamide with a carefully chosen blend of complementary actives for maximum results — all in a lightweight vegan formula that works for every skin type.

Ready to see what niacinamide can do for your skin?

Discover Lacus Temporis Pro Collagen Serum — £68