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Day & Night Serum Duo

Day & Night Serum Duo

Peach & Lily

Use code VIP25 for 25% off sitewide, excluding gift cards and some kits/bundles. All sales are final and cannot be combined with Peach Points or other promotions. Offer ends 12/3 at 11:59pm PST. Please note that your order may take longer than usual to ship due to high demand.

Luminous skin day and night.

Get visibly radiant skin AM and PM with this duo. Our bestselling Glass Skin Refining Serum promotes visibly hydrated, smooth, luminous skin. Our breakthrough Retinal For All Renewing Serum visibly reverses and prevents signs of aging with a powerful yet gentle dose of 0.1% retinal. Skin will appear firm and more even-toned with a youthful glow.

The results speak for themselves:

Glass Skin Refining Serum:*

  • 100% said the serum is suitable for sensitive skin
  • 96% saw smoother and softer skin
  • 96% saw increased hydration and improved dry patches
  • 92% saw brighter, more luminous, and healthier skin with a radiant glow

Retinal For All Renewing Serum:*

  • 50% reduction in fine lines and wrinkles1,2
  • 50% improvement in brightness1,2
  • 62% improvement in skin texture1,2
  • 67% improved skin barrier4
  • 0% irritation3

*3rd party consumer study results

or 4 installments of
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    The Day & Night Serum Duo includes: 

    Glass Skin Refining Serum (40ml): A #1 bestselling serum featuring an effective, silky, and weightless formula that visibly brightens, firms, hydrates, and calms skin.

    Retinal For All Renewing Serum (30ml): Dramatically improves the look of deep wrinkles, lines, sagging skin, dark spots, and texture.

    Footnotes:

    1. Measured by Corneometer, Tewameter, TEWL, Cutometer, Visia Scan instrumentation based on a 4-week and 12-week independent clinical study conducted by expert clinical graders.
    2. Percentages reflect a range of results and may indicate maximum benefits achieved.
    3. “Zero irritation” claim refers to a near 0% water loss to skin, post formulation application, as measured in a 4-week independent clinical study using a Tewameter, indicating virtually no skin-barrier disruption.
    4. “Improved skin barrier” claim refers to a 67.62% improvement of the skin barrier, as measured in a 12-week independent clinical study using a Tewameter, indicating 67.62% less transepidermal water loss (TEWL).
    5. S. Mukherjee, A. Date et al., Clin Interv Aging. 2006 Dec; 1(4):327 348.doi: 10.2147/ciia.2006.1.4.327
    6. Novel research by Kang S, Kim K, Jun SH, et al. Anti-Irritant Strategy against Retinal Based on the Genetic Analysis of Korean Population: A Genetically Guided Top-Down Approach. Pharmaceutics. 2021 Dec; 13(12): 2006. DOI: 10.3390/pharmaceutics13122006
    7. G. Siegenthaler et al., Retinol and retinal metabolism, Biochemical Journal, 1990, 268,pp 371 378
    Skin Concerns
    • Acne
    • Anti-aging
    • Dark Spots
    • Dullness
    • Fine Lines/Wrinkles
    • Firmness
    • Hyperpigmentation
    • Redness
    • Sensitivity
    • Uneven Skin Tone
    • Uneven Skin Texture
    Skin Types
    • Dry Skin
    • Normal Skin
    • Oily Skin
    • Combination Skin
    How to Use
    Glass Skin Refining Serum:
    Pat step 1 of the Day and Night Serum Duo onto clean, dry skin. Can be used AM and PM daily.

    Retinal For All Renewing Serum:
    Apply a pea-sized amount of step 2 of the Day and Night Serum Duo to clean, dry face and neck in the evening. Follow up with a moisturizer. Start once weekly, and increase frequency as needed. Can be used before or after Glass Skin Refining Serum.

    Precautions: If irritation occurs when using the skin care serum set, discontinue use and consult a specialist. Retinal is not recommended for those pregnant, nursing, or planning to become pregnant. Daily use of a broad spectrum SPF30 or higher is recommended.
    Glass Skin Refining Serum: Water (Aqua), Propanediol, Butylene Glycol, Niacinamide, 1,2-Hexanediol, Prunus Persica (Peach) Fruit Extract, Dioscorea Japonica Root Extract, Sodium Hyaluronate, Adenosine, Hydrolyzed Sodium Hyaluronate, Madecassoside, Hydrolyzed Hyaluronic Acid, Sodium Acetylated Hyaluronate, Acetyl Octapeptide-3, Ethylhexylglycerin, Hydrolyzed Corn Starch, Sodium Carbomer, Beta-Glucan, Saccharide Isomerate, Phytic Acid, Sucrose, Asiaticoside, Caprylyl Glycol Retinal For All Renewing Serum: Water, Caprylic/Capric Triglyceride, Cetearyl Alcohol, Butylene Glycol, Glycerin, Cyclodextrin, Sorbitan Stearate, Cetyl Ethylhexanoate, Daucus Carota Sativa (Carrot) Root Water, Camellia Japonica Flower Extract, Rubus Chamaemorus (Cloudberry) Seed Oil, Sodium Hyaluronate, Ectoin, Behenic Acid, Eclipta Prostrata Extract, Polyacrylate Crosspolymer-6, Bisabolol, Ceramide NP, Ceramide AP, Phytosphingosine, Cholesterol, Rhynchosia Nulubilis Seed Extract, Retinal, Lonicera Japonica (Honeysuckle) Flower Extract, Dextrin, Polygonum Multiflorum Root Extract, Moringa Oleifera Seed Oil, Ceramide EOP, Polyacrylate-13, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Sesamum Indicum (Sesame) Seed Extract, Melia Azadirachta Leaf Extract, Gardenia Florida Fruit Extract, Lonicera Caprifolium (Honeysuckle) Flower Extract, Hydrogenated Polyisobutene, Methylpropanediol, Potassium Sorbate, Sodium Cetearyl Sulfate, Polyglyceryl-6 Behenate, Glyceryl Caprylate, Hydroxyacetophenone, Phytosteryl/ Octyldodecyl Lauroyl Glutamate, Sucrose Cocoate, Polyglyceryl-10 Laurate, Ethylhexyl Palmitate, Sorbitan Isostearate, Polyglyceryl-10 Stearate, Pentylene Glycol, 1,2 - Hexanediol, Triethyl Citrate, Tocopherol, Sodium Levulinate, Glyceryl Stearate, Sorbitan Olivate, Ethylhexylglycerin, Cetearyl Olivate, Propanediol
    We spent three whole years perfecting our #1 bestselling serum, testing over two hundred formulas, including conducting face test on over forty cosmetic chemists in our partner lab, to see if it would be possible to truly create a product worthy of its name: Glass Skin Refining Serum. The serum became an instant cult favorite thanks to how effectively the formula delivered visible glass skin results which is why we included it in the Day and Night Serum Duo.

    When it came to Retinal for All Renewing Serum, we decided that we would not launch a retinoid product until we had a breakthrough where potency, stability, and gentleness could live together – because your skin deserves the best. After 3 years of development, 288 unique iterations, 27 published papers and 1 clinical study, Retinal for All Renewing Serum was born and added to our skin care serum set, featuring our exclusive, patent-pending R-IQTM technology that allows you to dramatically transform how your skin looks and feels – without worry about irritation.

    Combined, we spent over 6 years formulating these bestselling and iconic serums, carefully selecting a revolutionary cocktail of ingredients to deliver tremendous results in the Day and Night Serum Duo. We invite you into a whole new world of skincare where results come first, the ingredients are clean and fresh, and the experience is delightful. No tradeoffs, here.