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DIA Toning Serum Niacinamide 15%
Youlief DIA Toning Serum bottle with dropper, studio still life
Step 05 · Brighten

DIA Toning Serum Niacinamide 15%

1.01 fl. oz. / 30 mL
C$44

Fifteen percent, zero drama.

High-strength 15% niacinamide with a vitamin C derivative for a visibly brighter, more even-looking tone — cushioned by allantoin, betaine and eight forms of hyaluronic acid. Yes, the DIA is real: micro-fine diamond powder for instant luminosity.

Niacinamide 15%Even-tone lookInstant luminosity
✓Dermatologist Tested
✓Sensitive-Skin Tested
✓Made in Korea
In stock — ships across Canada now
Where to buy

Available now through Vegalab, Youlief’s distributor in Canada. Retail & stockist inquiries welcome.

How to use

After toner, apply 2–3 drops morning and/or evening. Start every other day if new to high-strength niacinamide. Follow with sunscreen in the morning.

Key ingredients

Niacinamide 15% · Ascorbyl Glucoside · 8-Form Hyaluronic Acid · Diamond Powder

Full ingredient list (INCI)

Water, Niacinamide, Butylene Glycol, Glycerin, 1,2-Hexanediol, Ascorbyl Glucoside, Arginine, Propanediol, Xanthan Gum, Carbomer, Betaine, Ethylhexylglycerin, Allantoin, Adenosine, Hydrolyzed Extensin, Disodium EDTA, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Pentylene Glycol, Melia Azadirachta Leaf Extract, Panthenol, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Paeonia Suffruticosa Root Extract, Sodium Hyaluronate, Polymethylsilsesquioxane, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Hydrolyzed Sodium Hyaluronate, Hydroxypropyltrimonium Hyaluronate, Potassium Hyaluronate, Sodium Hyaluronate Crosspolymer, Sodium Acetylated Hyaluronate, Diamond Powder

Ingredient Talk

Is 15% niacinamide too much?

Most brightening serums sit at 2–5%. At 15%, formulation is everything: this serum surrounds the active with soothers (allantoin, betaine, panthenol) and eight hyaluronic forms so high strength stays wearable. If you’re new to it, build up every other day.

Product features

01

High-Strength Brightening

15% niacinamide plus ascorbyl glucoside for a visibly brighter, even look.

02

Buffered, Not Brutal

Allantoin, betaine and panthenol keep the high percentage comfortable.

03

Eight Hyaluronic Forms

Layered hydration supports a smooth, glassy finish.

04

Real Diamond Powder

Micro-fine diamond powder lends skin an immediate luminous look.

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