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Moumoujus

HYDROXYDAIDZEIN.

Valuable CAS 485-63-2 / ANTIOXIDANT, SKIN CONDITIONING, SKIN PROTECTING

Hydroxydaidzein, specifically the 8-Hydroxydaidzein isomer, is an isoflavone exhibiting potent skin brightening and depigmenting capabilities. It precisely targets the melanin synthesis pathway while also offering antioxidant and potential anti-inflammatory benefits to the skin.

Summary

tyrosinase inhibitor depigmenting skin whitening antioxidant anti-inflammatory

Science

Mechanism of Action

8-Hydroxydaidzein operates as a potent and unique suicide substrate of mushroom tyrosinase, leading to its irreversible inhibition. This mechanism effectively reduces cellular tyrosinase activity and subsequent melanogenesis. Furthermore, as an isoflavone, it generally provides antioxidant support, and related isomers like 2'-Hydroxydaidzein have demonstrated anti-inflammatory properties.

Research

Clinical Evidence

Medium confidence
Effective range 2–4%
Optimal

4%

Key findings

  1. 01 A human clinical study showed that application of a cream containing 4% 8-Hydroxydaidzein led to significant increases in skin whitening (dL*-values) after three weeks. An 8-week treatment period confirmed stronger results with 4% compared to 2% concentration.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH 5 – 6
0 7 14

Stability

8-Hydroxydaidzein is highly unstable in alkaline solutions, showing complete degradation within one day at pH 8-9. Optimal stability, retaining over 85% after 20 days, is achieved when formulated in acidic solutions within the pH range of 5 to 6.

Conflicts

  • alkaline solutions

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Unknown

No specific safety assessments by prominent regulatory bodies such as CIR, SCCS, or FDA have been identified for Hydroxydaidzein or its common isomers. While general reviews exist for soy-derived ingredients, they do not directly cover Hydroxydaidzein.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Hydroxydaidzein is a valuable depigmenting agent with a precise mechanism of irreversible tyrosinase inhibition, demonstrating clinical efficacy in human skin at 4% concentration, though further safety and broad skin compatibility data are needed.

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