Kojic Acid vs Azelaic Acid: Which Brightening Ingredient Is Right for You?
Posted by Skinsider Team on 29th May 2025
Navigating the world of skincare actives can be tricky, especially when it comes to choosing between powerhouse ingredients like kojic acid and azelaic acid. Both are known for their brightening and clarifying effects—but what’s the difference, and which one is best for your skin type?
In this guide, we’ll break down what is kojic acid, what is azelaic acid, and how they compare in terms of benefits, usage, and top products. Whether you’re dealing with dark spots, acne, or sensitive skin, understanding these two ingredients can transform your skincare routine.
What Is Kojic Acid?
Kojic acid is a skin-brightening agent derived from fungi during the fermentation of rice. It works by inhibiting melanin production, making it a popular choice for fading dark spots and hyperpigmentation.
Kojic Acid Products to Try:
NINELESS B-Boost 1% Kojic Acid Serum
This serum delivers a targeted dose of 1% kojic acid to help lighten dark spots while being gentle enough for daily use. It’s ideal for those looking for gradual but visible improvement in skin clarity.
Highlights:
- Lightweight texture
- Brightens uneven tone
- Can be layered with other brightening actives
NINELESS B-Boost 1% Kojic Acid Toner
This toner offers a mild exfoliating and brightening effect, thanks to its kojic acid content. It’s perfect for prepping the skin and enhancing the efficacy of the rest of your skincare routine.
Best for:
- Daily use in AM or PM routine
- Enhancing the absorption of serums
- Sensitive skin types needing a gentle brightener
What Is Azelaic Acid?
Azelaic acid is a naturally occurring acid found in grains like barley and wheat. It has anti-inflammatory, antibacterial, and comedolytic properties—meaning it’s excellent for treating acne, rosacea, and pigmentation.
Azelaic Acid Products to Try:
NINELESS A-Control 10% Azelaic Acid Serum
This potent serum contains 10% azelaic acid, designed to combat acne, redness, and dullness in one go. It’s ideal for those struggling with congested skin or uneven tone.
Why it works:
- High-strength formulation
- Balances oil production
- Suitable for acne-prone and rosacea-prone skin
NINELESS A-Control Azelaic Acid Toner
A perfect prep step that offers mild exfoliation and anti-inflammatory support. This toner soothes irritated skin while providing the benefits of azelaic acid in a more gentle delivery system.
Perfect for:
- Redness-prone skin
- Reducing pore congestion
- Using before serums or moisturisers
How to Use Azelaic Acid and Kojic Acid
You can use both ingredients in the same routine—but ideally at different times of day (e.g., azelaic acid in the morning, kojic acid serum at night), or on alternate days to minimise sensitivity. Always patch test and wear SPF daily, especially when using brightening actives.
Which Ingredient Wins?
There’s no one-size-fits-all answer—kojic acid and azelaic acid are both excellent depending on your skin goals. If you’re battling post-acne marks and pigmentation, a kojic acid product may be your best bet. Struggling with acne, texture, or redness? Opt for an azelaic acid serum.
Either way, incorporating these actives into your routine can lead to smoother, brighter, and more even-toned skin over time.
