Which Is Better, Kojic or Glycolic Acid? A Scientific Comparison | Rysun Biotech

Asking "Which is better, kojic or glycolic acid?" One peels, the other inhibits. Rysun Biotech’s R&D experts compare the science and explain how to formulate for maximum brightening.

Which Is Better, Kojic or Glycolic Acid? A Scientific Guide to the Brightening Debate

Introduction
In the crowded market of skin brightening, two names appear on almost every ingredient list: Kojic Acid and Glycolic Acid. For brand owners curating a product line, or consumers trying to fade stubborn dark spots, the choice can be confusing. "Which is better, kojic or glycolic acid?"

At Guangzhou Rysun Biotechnology, we believe the answer lies in the biological mechanism. Founded in 2014 by Ivy Wong to solve the industry's "inconsistent quality," and specifically inspired by deep discussions with a Swiss anti-aging expert, we approach pigmentation issues with clinical precision.

Backed by our Research Institute and 20 leading scientists, we are here to break down the strengths of each acid. We will explain why they aren't enemies, but rather different tools for different jobs, and how Rysun manufactures the best versions of both.

Here is our private label kojic acid serum, pls click here for more details.

The Contender: Glycolic Acid (The "Surface Polisher")

To understand which is better, you must define the goal. If the goal is Speed and Texture, Glycolic Acid wins.

• The Mechanism: Glycolic Acid is an Alpha Hydroxy Acid (AHA). It works by breaking the bonds (glue) between dead skin cells on the surface. It physically peels away the top layer of skin where the pigment is trapped.
• Best For: Sun spots, rough texture, dullness, and "instant" glow.
• The Rysun Standard: We formulate Glycolic serums with precise pH buffering (pH 3.5–4.0). This ensures maximum exfoliation without the chemical burns associated with poorly balanced products.

The Contender: Kojic Acid (The "Pigment Blocker")

If the goal is Deep Pigmentation and Prevention, Kojic Acid wins.

• The Mechanism: Kojic Acid is not an exfoliator; it is a Tyrosinase Inhibitor. It dives deep into the skin and binds to copper ions, disabling the enzyme that produces melanin. It stops the spot from forming or getting darker.
• Best For: Melasma, hormonal pigmentation, and preventing future spots.
• The Rysun Standard: Kojic Acid is unstable. Leveraging our 253 intellectual properties, Rysun utilizes proprietary stabilization techniques to keep our Kojic serums clear and potent, preventing the oxidation (browning) common in generic brands.

Head-to-Head Comparison: Which Is Better?

The "Power Couple" Strategy: Why Choose?

The smartest answer to "Which is better, kojic or glycolic acid?" is: Use Both.
Modern R&D shows that these two ingredients are highly synergistic.

• The Synergy: Glycolic Acid removes the dead skin barrier, clearing a path for Kojic Acid to penetrate deeper and stop pigment production at the source.
• The Manufacturing Challenge:
  Formulating them together is difficult because Glycolic Acid is acidic, which can sometimes destabilize Kojic Acid.
• The Rysun Solution: Our Research Institute has developed "Practical Solutions" to this challenge. We manufacture Dual-Action Brightening Serums that utilize advanced stabilizers to keep both ingredients active in the same bottle. This offers your customers the speed of Glycolic with the long-term results of Kojic.

The Rysun Difference: Safety and Stability

Ultimately, an ingredient is only "better" if it is safe and stable.

• Glycolic Acid can cause burns if the concentration is too high.
• Kojic Acid becomes useless if it turns brown.
• Rysun Biotechnology eliminates these risks. We implement up to 50 inspection procedures per product. Whether you choose the resurfacing power of Glycolic or the inhibiting power of Kojic, we ensure the product is potent, stable, and safe for global export to over 50 countries.

Conclusion

Which is better, kojic or glycolic acid?

• Choose Glycolic to fix texture and surface spots fast.
• Choose Kojic to treat deep, hormonal pigment and prevent new spots.

At Rysun Biotechnology, we have the expertise to manufacture the highest quality versions of both. Partner with us to provide your customers with a complete "Brightening Ecosystem" that targets dark spots from every angle.

FAQs

Q1: Can I use Glycolic and Kojic Acid together?
A: Yes! Using a Glycolic toner followed by a Kojic serum is a highly effective routine. Just be sure to introduce them slowly to avoid irritation. Rysun can also manufacture a single serum containing both for convenience.

Q2: Which one is safer for darker skin tones?
A: Kojic Acid is generally safer. High concentrations of Glycolic Acid can sometimes cause irritation that leads to Post-Inflammatory Hyperpigmentation (PIH) in darker skin. Kojic Acid treats pigment without the harsh scrub/peel effect.

Q3: Can I use both in the morning?
A: It is risky. Glycolic Acid increases sun sensitivity significantly. Rysun recommends using Glycolic Acid at night. Kojic Acid can be used in the morning if paired with SPF 50+.

Q4: Why does Rysun recommend stabilization for Kojic Acid?
A: Because without it, Kojic Acid oxidizes and turns brown within weeks. Rysun’s proprietary stabilization technology ensures your brand’s product stays clear and effective on the shelf for years, not weeks.