Catalyst Milk Concentrate


Rejuvenate + Refine



This rejuvenating Milk Concentrate employs powerful recalibrating Peptides to masterfully reactivate skin’s pH back to a healthy, acidic level without irritation. Epidermal hydration is amplified while anti-inflammatory skin identical Zinc supports Australian Botanicals to fortify barrier function and enhance skin resilience.

  • Calms, and rejuvenates reactive and sensitised skins
  • Boosts skin resilience and solar defence mechanisms
  • Recalibrates skin pH and inhibits bacteria in acne skins
  • Prevents Trans-Epidermal Water Loss (TEWL) and enhances moisture transport
  • Provides anti-bacterial properties to combat breakouts and acne
  • Strengthens skin barrier function and reduces sensitivity
  1. Apply two to three drops of RATIONALE Catalyst Milk Concentrate in the evening after cleansing. Smooth gently over face, neck and décolletage.
  2. Directly follow with your RATIONALE night-time prescription.

Active Ingredients

Zinc PCA

  • Powerful anti-inflammatory actives that work to reduce redness, strengthen barrier function and promote overall skin health
  • Moisturises the skin, promotes healing and reduces redness

Amino Acids

  • Amplifies epidermal hydration and fortifies natural barrier function
  • Encourages healthy Glutathione production as a key antioxidant
  • Enhances skin resilience and strengthens barrier function
  • Rehydrates and locks in moisture by preventing TEWL
  • Enhances Natural Moisturising Factors (NMFs)
  • Maintains skin smoothness and suppleness


  • Gently re-acidifies the stratum corneum
  • Restores healthy barrier function
  • Brighten epidermal pigmentation by normalizing the desquamation process

Piroctone Olamine

  • Combats acne and sporadic breakouts by preventing the replication of bacteria on the skin’s surface
  • Offers superior defence against Propionibacterium bacteria (P.acnes)
  • Regulates sebum production in acne- or breakout-prone skin

Australian Solar Repair Botanicals

  • Reduce inflammation within sensitive and irritated skin
  • Boosts natural Solar Repair protective functions and defence mechanisms

Product Description

Gently reawakens skin’s own refining and retexturing processes for crystal clarity.

Additional Information





Skin Type

Rosacea, Sun Damage, Blemish-Prone, Dry, Pigmentation, Sensitive


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