A deeply nourishing and restorative repair cream designed to support skin barrier strength, replenish moisture and calm compromised or irritated skin. Iso-Repair helps restore comfort and resilience by delivering rich hydration while supporting the skin’s natural recovery processes.

What it does
• Helps reinforce the skin’s protective barrier
• Provides deep, long-lasting hydration
• Calms irritation and discomfort
• Improves skin softness and resilience

Key ingredients
• Urea & Ceramides – boost hydration and repair the lipid barrier
• Shea Butter & Squalane – rich emollients that nourish and soften the skin
• Vitamin E – antioxidant support to defend against environmental stressors
• Panthenol (Pro-Vitamin B5) – soothes and supports skin comfort

How to use
Apply to clean skin morning and evening or whenever the skin feels dry, compromised or irritated. Ideal for dehydrated, sensitised or barrier-weakened skin needing enhanced support and comfort.

A deeply hydrating daily moisturiser designed to restore moisture, strengthen the skin barrier and protect against dehydration. Hyal Ceutic helps relieve tight, dry skin while improving softness, comfort and overall skin quality.

What it does
• Provides long-lasting hydration
• Helps reduce transepidermal water loss
• Supports barrier repair and skin comfort
• Leaves skin smoother and more supple

Key ingredients
• Multi-weight Hyaluronic Acid (5.5%) – delivers hydration at multiple skin levels
• Aloe Vera (10%) – soothes and supports skin comfort
• Jojoba Oil & Shea Butter – nourish and reinforce the barrier
• Vitamin E – antioxidant protection

How to use
Apply to clean skin morning and evening to the face and neck

RATIONALE
#1 The Serum

30ml
$206.00
The Strengthening Collection 
Resilience. Intuition. Limitless Potential. 

The Story
The beauty of resilience—captured.

This sophisticated, skin-comforting serum intuitively nurtures skin resilience to enhance skin calmness and clarity day by day. The beginning of daytime radiance.

The Promise

• Cultivates skin calmness by soothing the appearance of irritation.
  

• Strengthens skin barrier function.
  

• Augments natural moisture levels.
  

• Rebalances skin tone and improves clarity.
  

• Amplifies natural luminosity.

The Ritual
Smooth gently over face, neck, décolletage and backs of hands each morning. 

Follow with your RATIONALE Essential Six formulations for day. 

The Research
The skin has its own immune system, with specialised tissues and cells playing a vital role in preventing environmental damage, allergy and disease.

The concept of skin immunity and beauty are exquisitely linked, with a healthy, resilient skin reflected in a clear and even complexion.

The vital processes of cell-to-cell communication and skin barrier function are supported by B-group vitamins and the phospholipid-protein structures of skin’s outermost layer, the Stratum Corneum.

RATIONALE
#2 The Light Crème

50ml
$202.00
The Vitality Collection 
Vitality. Energy. Exuberance

The Story
This supremely light Formulation delivers antioxidant nourishment and protection, imbuing skin with glowing hydration.

A proprietary Complex of Antioxidants, Vitamins and Botanical Extracts reanimate skin vitality and visibly calms the skin to reinstate a radiant, even tone.

The Promise

• Supports the skin with protective Antioxidants.
  

• Imbues a supremely supple feel.
  

• Elicits firmer looking skin.
  

• Amplifies radiance, promoting the appearance of a more even tone.
  

• Rejuvenates skin for youthful exuberance.

The Ritual
Smooth gently over face, neck, décolletage and backs of hands each morning.

Follow with your recommended RATIONALE Essential Six formulations. 

The Research
Human skin acts as a physical shield against any oxidative chemical and physical air pollutants, however prolonged and repetitive exposure leads to an increased production of free radicals. Free radicals are highly reactive molecules that inflict damage on healthy skin cells. Of the many types of free radicals, the greatest concern to our skin is known as Reactive Oxygen Species (ROS), formed by the metabolism of oxygen in the cells’ mitochondria. Our skin requires antioxidants to help combat the effect of ROS on the skin. When there is an imbalance in the ratio of ROS to antioxidants, this leaves the skin in a state of oxidative stress leading to signs of skin aging including dullness, pigmentation, and inflammation.

Similarly, when there is excess glucose present in the bloodstream, this triggers a reaction causing sugar molecules to bind to collagen and elastin fibres, known as Glycation. The crystallisation of these molecules accelerates the degradation of collagen, resulting in the cross-linking of wrinkles. During this process, Advanced Glycation End-Products (AGEs) are produced, harmful compounds that also contribute to oxidative stress. A daily dose of antioxidants and Anti-Glycation actives helps to effectively preserve collagen in the skin and maintain a youthful appearance.

Vitamin C is a potent antioxidant famous for its ability to visibly even skin tone and most importantly, its inhibition of the Tyrosinase enzyme, reducing the excess production of melanin in the skin, leading to hyperpigmentation. It also increases cellular turnover in the epidermis, helping to break down clusters of pigment and even skin tone.

RATIONALE
#3 The Tinted Serum SPF50+

30ml
$204.00
The Brilliance Collection 
Brilliance. Inspiration. Illumination. 

The Story
This hydrating daily serum imparts a radiant, translucent finish while offering advanced solar and environmental protection with our proprietary Zinc Fusion technology.

Fortified with Skin Identical Melanin and photo-protective metallic oxides, these bioactive pigments are responsible for creating the formulation’s luminescent, non-whitening tint.

Skin radiance amplified by one unique, light-filled formulation.

The Promise

• Elicits immediate luminosity with light-reflecting particles.
  

• Provides solar and environmental protection while rejuvenating skin.
  

• Strengthens skin integrity and alleviates irritation.
  

• Calms skin for a more even, illuminated appearance.
  

• Renewed firmness is realised with a multi-vitamin complex.

The Ritual
Shake well to activate formula. 

Apply to face, neck, décolletage and backs of hands each morning.

This formulation may be reapplied throughout the day as needed.

The Research
Long have we studied the profound interactions of human skin, sunlight and metallic oxides including Zinc. Found in abundance throughout the human body, Zinc is vital to the health of every cell. Beyond delivering radiant skin and cellular nutrition, topical Zinc Oxide forms a protective shield against sunlight and environmental aggressors. But we’ve gone much deeper with Zinc…

Marking a new paradigm in multifaceted skincare, #3 The Tinted Serum SPF50+ boasts an entirely unique and innovative complex of Zinc Oxide—a powerhouse antioxidant and environmental protector. Our proprietary array of Zinc particle profiles delivers a radiant, translucent finish with comprehensive solar protection benefits, filtering UV, Visible Light and Infrared Radiation. We call this The Solar Constant.

RATIONALE
#4 The Cleanser

200ml
$120.00
The Integrity Collection 
Integrity. Fulfilment. Harmony. 

The Story
A restorative evening ritual.

This luxurious crème formulation re-establishes skin integrity as all remains of the day are gently removed.

Your evening cleansing routine elevated to a rewarding skin ritual.

The Promise

• Skin appears more hydrated.
  

• Skin feels softer and more supple.
  

• Comforts skin, soothing the appearance of irritation.
  

• Gently cleanses to optimally prepare skin for night-time actives.

The Ritual
Massage cleanser over dry or damp skin. Rinse thoroughly with tepid water. 

Follow with your RATIONALE Essential Six formulations for night. 

The Research

The skin’s outermost layer, the Stratum Corneum, exists to perform its vital barrier function.

An exquisitely balanced composition of lipids, comprised of ceramides, cholesterol and triglycerides comprise a living barrier that keeps skin moist and supple, helping to prevent infection by providing a shield against sunlight and other environmental aggressors. 

These ‘living lipids’ are also crucial to cell-to-cell communication and biochemical signalling, forming a dynamic, interactive interface between the skin and the outside world.

Stratum Corneum lipids and proteins are synthesised in the skin’s upper layers, but the efficiency of this process diminishes with age and environmental damage, leading to skin dryness and sensitivity. Topical lipid supplementation through the processes of cleansing and moisturising can replenish and stabilise this biological defensive function.

Foaming cleansers tend to dry and strip the skin of precious nutrients and lipids, increasing dehydration and reactivity. The correctly balanced combination of intercellular lipids, vitamins and botanicals can gently remove daily debris, including sunscreens and pollution, while augmenting and reinforcing Stratum Corneum barrier structures.

RATIONALE
#5 The Milk Concentrate

30ml
$214.00
The Clarity Collection 
Clarity. Balance. Radiance.

The Story
Profound clarity and radiance.

A gently nourishing milk concentrate that resets skin’s pH to a healthy balance while promoting skin calmness.

This formulation promotes skin refinement to fortify barrier function, amplifying moisture levels and enhancing skin resilience to radiant effect.

The Promise

• Calms, clarifies and rejuvenates skin.

• Gently recalibrates skin pH to enhance ongoing clarity.

• Supports skin resilience.

• Skin feels hydrated, softer and more supple.

• A more radiant tone and texture is revealed.

The Ritual
Smooth gently over face, neck, décolletage and backs of hands each evening. 

Follow with your RATIONALE Essential Six formulations for night. 

The Research
A vibrant, radiant complexion is intimately connected to the pH of the skin’s outermost layer, the Stratum Corneum.

Sensitivity, barrier breakdown, pigmentation and premature ageing are all consequences of environmental damage. These occur as a result of excessive solar exposure, causing the skin’s pH to shift from a healthy acidic state to alkaline, triggering the upregulation of enzymes that break down connective tissue and erode protective barrier structures.

Signalling peptides in human skin direct all metabolic processes, including desquamation (cell turnover), cellular differentiation (cellular function), and hydration. Short-chain protein sequences and ceramides are critical in these intercellular communication processes.

RATIONALE

#6 The Night Crème

50ml
$230.00
The Renewal Collection 
Rejuvenation. Suppleness. Sumptuous nourishment.

The Story
Supercharge skin’s nightly rejuvenation with the evolution of our iconic #6 The Night Crème. This sumptuous, enriched Formulation initiates profound transformation by empowering the nocturnal process of skin rejuvenation. As cellular renewal is supported, sustained hydration is delivered for a visibly firmer, smoother, more glowing complexion.

The Promise

• Visibly firms, plumps and rejuvenates by supporting collagen and elastin.
  

• Definition and volume are enhanced as skin is strengthened.
  

• Elicits a radiant, more even complexion.
  

• Skin feels smoother, more supple and nourished.
  

• Delivers supreme skin hydration.

The Ritual
Smooth a pearl-sized amount gently over the face, neck décolletage, and backs of hands each evening. Follow with your RATIONALE Essential Six Formulations for night.

The Research
In human skin, multiple enzymes work together to repair DNA damage. DNA repair occurs in three main steps, the first identifies and removes the damaged section of DNA, the second synthesises replacement DNA, and then finally the DNA strand is sealed. This process is extremely fast and is happening constantly throughout the body, including our skin, which suffers DNA damage caused by the sun and pollution.

RATIONALE
Beautiful Skin Superfluid SPF30 M3

30ml
$118.00
Skin-Perfecting Tint
The final facet of your morning ritual.

The Story
Luminising skin perfection, coupled with sophisticated protection.

This luxurious Formulation delivers SPF30 while imbuing a sheer, skin-syncing finish. Created for all Melanotypes, it calms the appearance of redness and reanimates the skin’s inherent radiance, for a hyper-natural, incandescent glow.

The Promise

• Imbues a perfected skin finish.
  

• Amplifies the skin’s inherent luminosity.
  

• Delivers sophisticated solar and environmental protection.
  

• Imparts a light-diffusing lustre.

The Ritual
Shake well to activate Superfluid Formulation.

Apply liberally and gently smooth across forehead, cheeks, nose, and chin.

Blend to perfect skin tone and amplify luminosity. 

Apply a second layer if desired, to intensify coverage. 

The Research
When light interacts with skin's surface it is either reflected or diffused. The contributing factors of solar and environmental exposure can contribute to an uneven texture, tone, and dehydration, causing a greater diffused reflection, but refined, healthy, and luminous skin demonstrates a specular reflection. 

Ensuring the skin's protective mechanisms and natural moisturizing factors are optimized is essential to enhance the skin's radiance. The combination of protective skin minerals in addition to perfecting and nourishing ingredients deliver an elevated brilliance and desired reflection. 

Number one, best-selling cleanser! A gentle, daily facial cleanser strengthened by award-winning antioxidants and fortified with anti-pollutant boosters that trap and remove dirt and excess sebum. V8 Peptide Complex® leaves the skin super hydrated and refreshed.

For all skins including the most compromised, post-peel, laser and surgery.

1000mg per capsule

100 Capsules

Contains natural Essential Fatty Acids such as Omega 3, 6 & 9 and Gamma-Linolenic Acid (GLA) to support healthy skin and hair.

Features and benefits:

• Supports healthy blood circulation and flow to the peripheral areas of the body (legs, hands and feet).

• Supports the improvement of general well-being.

• Maintains healthy skin and hair.

• Maintains healthy cardiovascular system.

• Quality and potency certified by laboratory analysis.

• Complies with strict Australian Good Manufacturing Practice (GMP) standards.

• Therapeutic claims based on documented evidence.

As a precaution, O Cosmedics recommends consulting your doctor before use during pregnancy and breast feeding.