Immunologist Serum | RATIONALE
Immunologist Serum
Skin Vitality + Resilience
Conveys skin clarity and calmness by boosting skin immune responses and targeting pigmentation.
Skin Conditions
Niacinamide (Vitamin B3) helps to reduce blemishes by regulating sebum production and calming inflammation, restoring the skin’s natural health and clarity. It also helps to fade and prevent hyperpigmentation associated with acne scarring. Australian SolarProtective Botanicals strengthen capillaries to reduce vascularity and redness.
Dry Skin
Niacinamide (Vitamin B3) helps to prevent moisture loss through the layers of the skin, whilst boosting the skin’s ceramide production and fortifying barrier function. Amino Acids and Peptides help to rehydrate the skin and Adenosine Triphosphate provides a vital source of cellular energy to boost healthy function of skin. Australian SolarProtective Botanicals replenish the skin with Antioxidants, further preventing skin damage and dryness.
Niacinamide (Vitamin B3) inhibits the transfer of melanin to surface layers of the skin, preventing pigmentation and helping to fade existing sun-induced discolouration. Australian SolarProtective Botanicals boost the skin’s solar resilience.
Niacinamide (Vitamin B3) boosts skin immunity, supporting it’s natural anti-inflammatory function for enhanced skin resilience and reduced vascularity. Australian SolarProtective Botanicals also help to reduce redness and strengthen capillaries preventing against further damage.
Niacinamide (Vitamin B3) boosts skin immunity and fortifies barrier function. Amino Acids rehydrate the skin and Adenosine Triphosphate provides a vital source of cellular energy for skin strength and resilience. Australian SolarProtective Botanicals reduce inflammation and irritation within the skin.
Sun Damage
Niacinamide (Vitamin B3) targets pigmentation by normalising melanin production and inhibiting pigmentation. It also boosts skin immunity, strengthening solar resilience and fortifying barrier function. Australian SolarProtective Botanicals provide antioxidant protection against sun damage and help to stimulate collagen production.
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