Brightening

Undecylenoyl Phenylalanine

Undecylenoyl Phenylalanine (trade name Sepiwhite) — a depigmenting component that works by specifically blocking the alpha-melanocyte-stimulating hormone receptor, providing skin tone evenness without the typical irritation risks of hydroquinone.

depigmenting actionblockade of the alpha-MSH receptortone eveninghydroquinone alternative

✓ Safe

Comedogenic Rating

0/5

Irritation Potential

0/5

What is it?

Undecylenoyl Phenylalanine — a molecule that specifically blocks the binding of alpha-melanocyte-stimulating hormone (α-MSH) to its receptor (MC1R) on the surface of melanocytes. Mechanism: α-MSH is a key signal that triggers the tyrosinase cascade and leads to melanin synthesis in response to UV exposure and inflammation. By blocking the receptor interaction at the very beginning of the cascade, undecylenoyl phenylalanine interrupts the signal before the entire melanogenesis process is activated — this fundamentally distinguishes the mechanism from components that act at later stages (tyrosinase inhibitors such as arbutin or kojic acid).

Products for evening skin tone and combating hyperpigmentation, formulas for post-inflammatory hyperpigmentation (PIH), hydroquinone alternative products for sensitive skin.

Key Benefits

✦

Early interruption of the melanogenesis cascade

Undecylenoyl phenylalanine blocks the signal at the very first stage of the pigmentation process — the interaction of α-MSH with the MC1R receptor — before the entire subsequent cascade of melanin synthesis is activated. Mechanism: competitive receptor blockade prevents signal transmission, ultimately leading to the activation of tyrosinase. Result: effective reduction of new melanin formation, especially useful for the prevention and control of hyperpigmentation caused by inflammation or UV exposure.

◈

A milder alternative to traditional depigmenting components

Due to its receptor mechanism of action (rather than direct enzyme suppression or cytotoxic action on melanocytes, as with hydroquinone), undecylenoyl phenylalanine is generally well tolerated by the skin with minimal irritation risk. This makes the component an attractive option for sensitive skin or prolonged regular use.

✧

Complementary action with other depigmenting actives

Due to its unique receptor-level mechanism of action, undecylenoyl phenylalanine works well in combination with components that act at other stages of melanogenesis (tyrosinase inhibitors — arbutin, kojic acid; antioxidants — vitamin C), creating a comprehensive multi-level approach to evening skin tone.

Suitable for

skin with hyperpigmentationpost-inflammatory pigmentation (PIH)sensitive skin requiring depigmenting care

Main Actions

✓ blockade of the α-MSH receptor✓ early interruption of melanogenesis✓ gentle evening of skin tone

Undecylenoyl Phenylalanine: safety and concentration

Undecylenoyl phenylalanine has a fatty acid derived from castor oil in its structure, well tolerated by most skin types. INCI: Undecylenoyl Phenylalanine. Concentration: 1-3% in depigmenting formulas. Often used in combination with sunscreen for maximum effectiveness.

CategoryBrightening

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