#1 The Strengthening Serum

Name: #1 The Strengthening Serum
Brand: RATIONALE
Price: 227.00 NZD
Availability: InStock

$227.00

The first step in the RATIONALE morning routine. A serum built around a proprietary B-group vitamin complex that reinforces the skin barrier, restores radiance and delivers hydration — doing three things simultaneously rather than requiring three products. Suitable for combination skin types. 30ml.

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Pickup available at Victoria Street

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Combination — the primary skin type this formula is designed for / Lacking radiance and needing a morning active that addresses barrier function alongside brightness / Building out the RATIONALE routine — this is where you start in the AM

Apply to clean skin as the first step of your morning routine. Follow with #2 The Brightening Serum or #2 The Brightening Light Creme, then #3 The Brilliance Tinted Serum SPF50+. Part of the RATIONALE AM routine: #1 → #2 → #3.

The first of six. RATIONALE is built as a complete routine, and #1 The Strengthening Serum is where the morning starts. A proprietary B-group vitamin complex — niacinamide, pyridoxine, panthenol and cyanocobalamin alongside ceramides, hyaluronic acid and a dense Australian botanical extract blend — works to reinforce the skin barrier, restore radiance and deliver hydration simultaneously. Not one thing at once. All of them. For combination skin in particular, this is a serum that addresses what that skin type actually needs rather than optimising for one concern and ignoring the rest.

RATIONALE is a cosmetic chemistry-led skincare range built around six pillars of skin health — not six hero ingredients, six complete formulations. Each product is designed to do multiple things at once, addressing a skin goal from every angle rather than making you layer five products to get the same result. Created by a cosmetic chemist, the range is structured as a full routine: #1 through #3 for the morning, #4 through #6 for the evening. Simple in concept, serious in results.

Rosa Damascena (Rose) Flower Water, Niacinamide, Glycerin, Pentylene Glycol, Aloe Barbadensis (Aloe Vera) Leaf Juice, Aqua (Water), Methylpropanediol, Coco-Caprylate/Caprate, Glyceryl Stearate Citrate, Cetearyl Alcohol, Caprylyl Glycol, Olive Oil Decyl Esters, Xanthan Gum, PEG-40 Hydrogenated Castor Oil, Trideceth-9, Hydrogenated Lecithin, Cetyl Alcohol, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Phenylpropanol, Santalum Spicatum (Sandalwood) Seed Oil, Citrus Aurantium Dulcis (Orange) Oil, Disodium EDTA, Glyceryl Caprylate, Squalene, Propylene Glycol, Butylene Glycol, Citrus Aurantium Bergamia (Bergamot) Fruit Oil, Citrus Grandis (Grapefruit) Peel Oil, Citrus Limon (Lemon) Peel Oil, Litsea Cubeba Fruit Oil, Citrus Aurantium Bergamia (Bergamot) Leaf Oil, Juniperus Mexicana Oil, Pelargonium Graveolens Oil, Citrus Aurantium Amara (Bitter Orange) Flower Oil, Eugenia Caryophyllus (Clove) Leaf Oil, Sodium Hyaluronate, Ascorbyl Glucoside, Collagen Amino Acids, Polysorbate 60, Sorbitan Isostearate, Citric Acid, Ceteareth-25, Potassium Sorbate, Magnesium Aspartate, Zinc Gluconate, Brachychiton Acerifolius Flower Extract, Sodium Benzoate, Leuconostoc/Radish Root Ferment Filtrate, Leuconostoc/Radish Root Ferment Lysate Filtrate, Phospholipids, Adenosine Triphosphate, Glycosphingolipids, Behenic Acid, Ceramide NP, Cholesterol, Copper Gluconate, Ethylhexylglycerin, Phenoxyethanol, Ceramide NS, Glycine, Tocopherol, Serine, Glutamic Acid, Ceramide AP, Ceramide EOP, Ceramide EOS, Banksia Serrata Flower Extract, Citrus Australasica Fruit Extract, Davidsonia Pruriens Fruit Extract, Hibiscus Sabdariffa Flower Extract, Melaleuca Alternifolia (Tea Tree) Leaf Extract, Santalum Acuminatum Fruit Extract, Tasmannia Lanceolata Fruit Extract, Telopea Speciosissima Flower/Leaf Extract, Terminalia Ferdinandiana Fruit Extract, Aspartic Acid, Leucine, Acetyl Octapeptide-3, Caprooyl Phytosphingosine, Caprooyl Sphingosine, Alanine, Lysine, Arginine, Tyrosine, Phenylalanine, Proline, Threonine, Valine, Isoleucine, Histidine, Limonene, Citral, Citronellol, Geraniol, Linalool, Eugenol

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#1 The Strengthening Serum

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