✔ Delivers brightening support with a stabilized 15% Vitamin C to improve the look of skin tone and radiance

✔ Helps reduce the visible appearance of hyperpigmentation and post-acne marks

✔ Offers antioxidant support to help defend against daily oxidative stress

✔ Features prebiotic to support hydration and help maintain the skin’s surface microbiome

✔ Contains a biomimetic peptide that helps refine uneven texture and supports skin resilience

✔ Kakadu Plum Extract, which has up to 100X more vitamin c than oranges, helps optimize Vitamin C transport for improved formula efficacy

✔ ASB works synergistically to enhance the performance and stability of Vitamin C

✔ Lightweight, water-based formula ideal for daily use on oily, combination, or acne-prone skin

✔ Fragrance-free (naturally scented from raw materials only)

✔ Vegan, cruelty-free, and free of common cosmetic irritants

✔ Compatible with most skincare routines and can be layered with moisturizers or SPF

Ascorbyl Tetraisopalmitate (ATIP)

Ascorbyl Tetraisopalmitate (ATIP) is a highly stable, oil-soluble form of vitamin C that penetrates deeply into the skin to stimulate collagen production and brighten the complexion. Known for its antioxidant power, it helps protect against oxidative stress and environmental damage while reducing the appearance of dark spots, uneven tone, and signs of aging. Unlike traditional vitamin C, it is gentle on sensitive skin and remains effective over time, making it a reliable choice for improving firmness, radiance, and overall skin clarity.

Ascorbic Synergy Booster (ASB)

Ascorbic Synergy Booster (ASB) is a water-soluble active powered by L-Ergothioneine, designed to protect and enhance the performance of vitamin C in skincare formulations. By helping recycle and stabilize ascorbic acid within skin cells, it boosts collagen synthesis, brightening, and antioxidant activity while minimizing the degradation of vitamin C under oxidative stress. This ingredient works synergistically at the cellular level, supporting the skin’s natural defense systems and maximizing the visible benefits of vitamin C for healthier, more radiant skin.

Advanced Osmolyte System (AOS)

Advanced Osmolyte System (AOS) is a synergistic blend of naturally derived osmolytes designed to optimize cellular hydration, especially under environmental stress. By balancing osmotic pressure inside and outside skin cells, this system helps prevent water loss, boosts moisture retention, and protects cell structure. AOS reinforces the skin’s barrier function and improves elasticity, delivering fast, long-lasting hydration for smooth, supple, and resilient skin—even in challenging conditions like cold, dry, or polluted environments.

Kakadu Plum Extract (KPE)

Kakadu Plum Extract (KPE) is a potent, multifunctional active ingredient derived from Terminalia ferdinandiana, the world’s richest natural source of vitamin C. Sustainably harvested from Australia’s Kakadu National Park, this superfruit extract is packed with antioxidants, polyphenols, and essential vitamins that combat oxidative stress and environmental damage. KPE enhances skin luminosity, smooths fine lines and wrinkles, and boosts radiance by stimulating pro-collagen I, hyaluronic acid, and the skin’s vitamin C transporter (SVCT-I) for improved absorption. Clinically proven to brighten, firm, and protect the skin, it offers a powerful natural solution for maintaining a youthful, glowing complexion.


Holobiotic Smoothing Active (HSA)

Holobiotic Smoothing Active (HSA) is a microbiome-focused ingredient designed to rebalance skin affected by blemishes, uneven texture, and redness. It works by supporting the skin’s natural holobiont—the ecosystem of skin cells and beneficial microbes—helping to reduce the presence of blemish-causing bacteria while promoting a healthier microbial balance. This active soothes inflammation, smooths rough patches, and refines pores, leading to visibly clearer, calmer, and more even-toned skin. It’s especially useful in products aimed at sensitive, acne-prone, or imbalanced complexions.

Use daily, morning and/or evening.
Apply 1–2 pumps to clean, dry skin.

✔ Smooth evenly over the face or apply to targeted areas

✔ Follow with moisturizer and sunscreen (if used in the morning)

✔ Layer before oils, creams, or makeup

Our Commitment to Skin Longevity & Barrier-Safe, Science-Backed Skincare

At Lontreau, we are committed to developing high-quality skincare formulations that prioritize skin resilience, hydration, and barrier health. Our products are designed to work in harmony with the skin’s natural processes, supporting moisture retention, environmental protection, and overall skin wellness. Proudly made in Canada, we carefully select clinically researched ingredients to help maintain healthy-looking skin over time.

• Science-Driven Formulations: Our products are developed with carefully chosen ingredients that support hydration, skin barrier function, and oxidative stress defense. We focus on moisture balance, protection from external stressors, and maintaining the skin’s natural integrity.

• Barrier-Supporting Approach: Healthy skin starts with a strong skin barrier. Our formulations are designed to help reduce moisture loss, support the skin’s protective layer, and promote optimal hydration levels.

• Sustainable Practices: As part of Repurpose Global’s Plastics Negative program, we remove more plastic from the environment than we use. Our recyclable packaging and airless containers are designed to help minimize waste while preserving product integrity.

• Clean Formulations: Our products are free from parabens, synthetic fragrances, phthalates, and other unnecessary additives. We focus on ingredient transparency to ensure our formulations meet high safety and quality standards.

Our High Standards for Skin Care

Lontreau products are formulated with strict ingredient selection and quality control standards to support overall skin wellness. Our skincare is:

✔ Designed to Support Skin Barrier Function – Helping to maintain moisture balance and skin resilience.

✔ Developed with Gentle, Skin-Compatible Ingredients – Suitable for a variety of skin types, including sensitive skin.

✔ Formulated Without Harsh Additives – Free from parabens, synthetic fragrances, and phthalates.

✔ Sustainably Packaged – Using recyclable materials and responsible sourcing practices.

At Lontreau, we believe in science-backed skincare that supports skin barrier health and hydration. Our mission is to provide thoughtfully formulated, high-quality products that help maintain healthy-looking, resilient skin over time.