THE MARYLEBONE INSTITUTION
← Back to the collectionFORMULA 04 / PHA REFINING SERUM
The PHA Refining Serum tall slim glass bottle with a burgundy Marylebone Institution label
BRANDED BOTTLE STUDY / NOT FINAL PACKAGING

FORMULATION 04 / TEXTURE & REFINEMENT

THE PHA
REFINING SERUM.

A different route to surface refinement.

We're assessing a PHA liquid-serum sample as a potential treatment for skin that looks uneven in texture. PHAs are a class of exfoliating acids; suitability depends on the final formula, concentration and instructions.

  • Liquid serum format
  • Refining treatment concept, distinct from our hydration serum
  • Full formulation still awaiting supplier confirmation
FORMULACS0425
TYPEPHA liquid serum
STAGEUnder evaluation
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Working name and illustrative bottle. Product is not for sale; active percentages, price and final instructions are unconfirmed.

THE FORMULATION / IN EVALUATION

THE PURPOSE.
THE QUESTIONS.

THE SKIN CONCERN
Uneven-looking surface texture and a desire for considered exfoliation. We are evaluating whether the final formula and routine guidance make it suitable for our collection.
WHAT IS A PHA?
Polyhydroxy acids are a group of exfoliating ingredients. Their effect and tolerability depend on the actual formula; this sample should not be assumed suitable for all skin types.
SUPPLIER SAMPLE
CS0425 PHA Liquid Serum. We have not received a verified complete public ingredient list or active concentrations for this sample, so those details are deliberately not stated.
HOW IT MAY FIT A ROUTINE
A potential leave-on refining step, only after instructions, compatibility and frequency have been confirmed. Avoid combining exfoliating treatments without understanding your skin's tolerance; wear SPF by day.
DEVELOPMENT STATUS
Under formulation and suitability review. Working name, bottle mockup, directions and claims are provisional. No final quantity, price or launch date.

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