Immunologist Serum | RATIONALE
Immunologist Serum
Skin Vitality + Resilience
Conveys skin clarity and calmness by boosting skin immune responses and targeting pigmentation.
Skin Conditions
Yellow Number One

Immunologist Serum

This protective formula combines a powerful Vitamin B3 Complex with Amino Acids to boost skin immune responses and target pigmentation, while Australian SolarProtective Botanicals reinforce solar defences. Provides a vital source of cellular energy, optimising intercellular communication and fortifying skin barrier function.

  • Supports skin immune responses

  • Boosts skin's solar resilience

  • Reduces sensitivity and irritation

  • Helps fade and prevent pigmentation

  • Regulates sebum production

  • Brightens and boosts skin luminosity

  1. Smooth gently over face, neck, décolletage and back of hands each morning.

  2. Use in conjunction with your prescribed RATIONALE Essential Six formulas for maximum daily protection and rejuvenation.

If you are unsure about how this product fits in to your RATIONALE skincare routine, our expert Team of Online Skin Consultants is here to help.

Active Ingredients

Niacinamide (Vitamin B3)

  • Boosts skin immunity
  • Fortifies barrier function
  • Regulates sebum production
  • Fades and prevents hyperpigmentation
  • Calms redness

Australian SolarProtective Botanicals

  • Protects against solar induced DNA damage
  • Enhances solar resilience
  • Stimulates healthy collagen production
  • Strengthens capillaries + barrier function

Amino Acids (Acetyl Glutamyl Heptapetide-1)

  • Boosts skin immunity 

Adenosine Triphosphate

  • Provides vital source of cellular energy

Ascorbyl Glucoside (Vitamin C) 

  • Stable form of Vitamin C
  • Brightens hyperpigmentation
  • Prevents damage to skin immune cells