OneSkin OS-01 FACE + BODY Head-to-Toe Skin Health Duo - OS-01 Peptide Moisturizer Set

"Skin Aging Doesn't Stop at the Jawline. Neither Should the Routine."

Maya here. The thing I've noticed after years of building a K-beauty platform is that we talk about face skincare with real precision - ingredients, percentages, layering order - and then the routine ends at the chin and we hope for the best below. The neck, the chest, the arms. The skin there ages too, and often faster, because most people aren't giving it the same attention.

The OneSkin OS-01 FACE + BODY Head-to-Toe Skin Health Duo is built around a single proprietary peptide - the OS-01 Peptide - applied to both the face and the body with formulas designed specifically for each. Two moisturisers, one science-backed active, one routine that covers what most routines skip. My dry, resistant skin responds well to peptide-forward formulas that are also fragrance-free - and this one removes the entire list of ingredients I check for first: no fragrance, no parabens, no sulphates, no mineral oil, no phthalates. Clean from the inside out.

What is the OS-01 Peptide and what makes it different from other anti-aging peptides?

The brand positions the OS-01 Peptide as targeting the root cause of skin aging rather than addressing surface symptoms. The science behind it focuses on senescent cells - aged cells that stop functioning properly but remain in the skin, releasing inflammatory signals that accelerate the degradation of surrounding tissue. The OS-01 Peptide is developed specifically to address this mechanism. This is a different target than most cosmetic peptides, which signal collagen synthesis or relax muscle contractions. The clinical result for OS-01 FACE: 96% of participants showed improvement in firmness. For OS-01 BODY: the formula strengthens the skin barrier by up to 41%.

💛 Maya's Note: Senescent cells - cells that have stopped dividing but remain metabolically active. They release pro-inflammatory signals that damage surrounding healthy cells. In skin, they accumulate with age and contribute to thinning, wrinkles, and loss of elasticity. Targeting them is a newer direction in longevity-focused skincare science. Topical supplement - a term the brand uses to position this product at the intersection of skincare and bioactive science, emphasising that the OS-01 peptide is a functional active with a documented mechanism rather than a conditioning ingredient.

Also Worth Considering:

What does the OS-01 FACE formula contain beyond the peptide?

Six supporting actives working alongside the OS-01 Peptide. Pracaxi oil provides moisturising, anti-inflammatory, antioxidant, antibacterial, and antifungal support. Andiroba oil - a seed oil - promotes healthy collagen and minimises inflammation. Niacinamide improves skin texture by promoting protein synthesis at the epidermal layer. Oleic Pau Mulato extract, sourced from an Amazonian tree, smooths wrinkles, minimises skin stress, and supports healing. Allantoin moisturises and soothes irritated skin. Hyaluronic acid in three molecular weights boosts collagen and elastin, supports epidermal regeneration, and maintains moisture across all skin layers. The result is a formula where every ingredient has a named function rather than a list built for label appeal.

💛 Maya's Note: Pracaxi oil - a seed oil from the Amazonian pracaxi tree (Pentaclethra macroloba). Documented for its high oleic and behenic acid content, which gives it barrier-supporting and anti-inflammatory properties. Andiroba oil - extracted from the seeds of the Carapa guianensis tree, native to the Amazon. Contains limonoids with documented anti-inflammatory properties and studies supporting collagen health. Pau Mulato extract - derived from the bark of the Calycophyllum spruceanum tree in the Amazon. Contains compounds documented for anti-wrinkle and skin-repair activity.

Also Worth Considering:

What does the OS-01 BODY formula contain, and why is it different from the face formula?

The body formula is built for different skin conditions. Tremella Fuciformis Sporocarp Mushroom extract reduces UV-induced water and collagen loss. Sulforaphane - a phytonutrient from cruciferous plants - provides potent antioxidant, antimicrobial, and anti-inflammatory activity. Genistein, a plant-derived isoflavone, helps prevent and fade photoaging and dark spots. Ceramides support the skin's natural lipid barrier for moisture retention and repair. Saccharide isomerate, a prebiotic, supports the healthy bacteria on the skin's surface. The body formula is specifically formulated to address crepey skin, which is the result of UV damage, collagen loss, and thinning that occurs on the arms, legs, chest, and back at a different rate from the face.

💛 Maya's Note: Sulforaphane - a glucosinolate-derived compound found in broccoli and other brassicas. One of the most studied natural antioxidants, with documented anti-inflammatory and cellular defence properties. Genistein - a phytoestrogen isoflavone found in soy. Documented for its ability to inhibit melanin synthesis and reduce UV-induced photoaging. Relevant for skin with pigmentation concerns as well as aging. Saccharide isomerate - a prebiotic carbohydrate derived from beech wood. Clinically studied for supporting the skin microbiome's beneficial bacteria, which contributes to a healthy, resilient skin barrier.

Also Worth Considering:

Is this safe for sensitive skin and what ingredients are absent from both formulas?

Both formulas are dermatologist tested and confirmed safe for sensitive skin. The clean ingredient commitment covers both products equally: 100% free from fragrance, parabens, sulphates, lanolin, MCI/MI, DEA, heavy metals, talc, petrolatum, paraffin, mineral oil, gluten, phthalates, and PFAs. The brand also states they do not include unnecessary emulsifiers, preservatives, and solvents. For sensitive skin, the combination of allantoin and niacinamide in the face formula and ceramides in the body formula provides soothing and barrier repair alongside the OS-01 peptide's primary anti-aging function.

Worth Knowing

The Clinical Results Come from Separate Studies: The 96% firmness improvement figure comes from the OS-01 FACE formula. The 41% skin barrier strengthening figure comes from the OS-01 BODY formula. They are independent results from separate clinical evaluations, not a combined study of the duo. Both are stated as brand-conducted clinical measurements. Knowing which result applies to which formula - and that they were measured separately - gives a clearer picture of what each product is documented to do.

The Body Formula Targets Crepey Skin Specifically: Crepey skin is caused by collagen and elastin loss alongside UV-induced damage to the deeper dermis - it behaves differently from wrinkles or fine lines because the structural damage is more extensive. The OS-01 BODY formula's ingredient selection - Tremella mushroom extract for UV-induced collagen protection, sulforaphane for cellular defence, ceramides for barrier restoration - reflects the specific biology of body skin aging rather than scaled-up face formula. The brand's recommendation to apply generously to arms, legs, chest, back, and stomach twice daily is built around the higher surface area and faster moisture loss of body skin.

Niacinamide in the Face Formula Has Dual Relevance: The brand positions niacinamide for protein synthesis and texture improvement at the epidermal layer. For skin with pigmentation concerns alongside aging - dark spots from sun exposure or post-inflammatory marks - niacinamide's additional documented function of reducing melanin transfer between skin cells makes it a secondary benefit worth noting. The face formula is not positioned as a brightening product, but the ingredient supports that outcome alongside its primary texture role.

Wondering How This Fits Into an Existing Routine: Both formulas are moisturisers - they go on after cleansing, toning, and serum steps as the final skincare layer before SPF in the morning. OS-01 FACE applies to face, neck, décolletage, and hands. OS-01 BODY applies to arms, legs, chest, back, and stomach. Twice daily for both. The duo is designed to replace existing face and body moisturisers rather than add to the routine, so the step count stays the same while the active ingredient profile changes.

The face routine gets all the attention. But the skin on the arms and chest shows aging just as clearly, and usually earlier, because most routines stop at the chin. A duo that covers both with the same clinical-grade peptide is the kind of thing I consider genuinely useful - not an upsell, but an actual gap filled. 💛