🇮🇪Ireland

MARY & MAY 6 Peptide Complex Serum for sensitive skin

Rated by Lovi · Unbiased, science-based skincare AI trained on real user outcomes

MARY & MAY 6 Peptide Complex Serum

Average

  • SuperiorNormal Skin Fit
  • AverageEffectiveness
  • HighSafety

Works for sensitive skin; other serums fit it better.

This fit is calculated for the concerns frequently associated with sensitive skin: redness, stinging, and reactions to new products. For scores and recommendations based on your full skin profile, including your 12D face scan results and any goals or preferences you have, please use the Lovi app.

Page built Nov 8, 2026How the Fit score works

Lovi Assistant explains

  • Offers excellent plumping and firming for your normal skin due to multiple peptides like copper tripeptide-1 and palmitoyl pentapeptide-4, which support collagen stimulation and extracellular matrix synthesis.
  • While the serum provides general hydration, it lacks specialized ingredients to effectively target your redness and irritation.
  • The formula is safe for your sensitive skin, as it contains no harsh or prohibited ingredients that could cause irritation.

How to apply

  • Use your serum in the PM routine, starting 3 times a week before building up to daily use if your skin is happy.
  • Apply the serum after cleansing and toning, but before putting on your moisturizer for the best results.
  • Gently press 2-3 drops of the serum into your skin and wait a minute ⏱ for it to soak in.
  • Since your skin is sensitive and easily irritated, apply the serum on completely dry skin to help keep it calm.
  • Always do a patch test before your first use and avoid getting the serum too close to your eyes .

People Say

★4.6Overall rating based on 2.4k+ reviews

Based on a very large amount of data, users with diverse skin types consistently praise this serum for its lightweight hydration and ability to plump the skin without irritation. While it is not a miracle cure for deep wrinkles, the majority of users report smoother skin texture, improved elasticity, and a reduction in fine lines after consistent use.

Highlights

  • Lightweight & fast-absorbing Mostly Mentioned
    • “absorbs instantly without stickiness”
    • “watery texture sinks right in”
    • “perfect for layering”
    • “leaves no greasy residue”
  • Gentle & non-irritating Often Mentioned
    • “great for my sensitive skin”
    • “no stinging or redness”
    • “fragrance-free and soothing”
    • “didn't break me out”
  • Hydrating & plumping Often Mentioned
    • “skin feels bouncy and soft”
    • “plumps up fine lines”
    • “provides a nice glow”
    • “keeps skin moist all day”
  • Good value Sometimes Noted
    • “better than expensive brands”
    • “great price point”
    • “affordable peptide option”
    • “high quality for the cost”
  • Subtle or slow results Sometimes Noted
    • “didn't see drastic changes”
    • “takes months to notice difference”
    • “good for maintenance but not a facelift”
    • “no miracle for deep wrinkles”
  • Consumed quickly Rarely Noted
    • “bottle finished in 3 weeks”
    • “skin drinks it up so I use a lot”
    • “small bottle for the amount needed”
  • Rare skin reactions Rarely Noted
    • “caused tiny red bumps”
    • “broke me out on forehead”
    • “slight itching after application”
    • “triggered fungal acne”
  • Texture too watery Rarely Noted
    • “runs down my face quickly”
    • “hard to control the dropper”
    • “wish it was slightly thicker”
    • “feels like water”

Sources: lovi.care, iherb.com, yesstyle.com, skinsort.com, reddit.com, youtube.com, and more

Questions and answers

How well does Mary & May 6 Peptide Complex Serum work for sensitive skin?

Mary & May 6 Peptide Complex Serum works well enough for sensitive skin, as its safe formula is unlikely to cause irritation. However, it lacks specialized ingredients to effectively target redness and irritation. A product of this type needs soothing and calming ingredients like niacinamide and snail secretion filtrate to properly care for sensitive skin.

International Journal of Cosmetic Science, 2005Cureus, 2026

Which ingredients make this serum a good fit for sensitive skin?

Copper Tripeptide-1 and Palmitoyl Pentapeptide-4 make this serum a good fit because they help firm the skin and boost collagen. While the formula is safe and unlikely to cause irritation, a product for sensitive skin also needs soothing ingredients like niacinamide or snail secretion filtrate to help calm redness.

Journal of Cosmetic and Laser Therapy, 2016International Journal of Cosmetic Science, 2005

What does Copper Tripeptide-1 do for sensitive skin?

Copper Tripeptide-1 helps calm sensitive skin by reducing inflammation and supports tissue repair for a healthier barrier. It may also improve firmness and reduce signs of aging while being gentle enough for daily use.

Skin Research and Technology, 2026Journal of Biomaterials Science. Polymer Edition, 2008

What does Hexapeptide-11 do for sensitive skin?

Hexapeptide-11 helps protect sensitive skin against everyday stress and may improve firmness. Sensitive skin needs gentle ingredients that calm irritation and strengthen its natural barrier, such as soothing plant extracts and barrier-repairing lipids.

Redox Biology, 2015

Where does it go in a skincare routine for sensitive skin?

This treatment goes in your evening routine after your toner and before your moisturizer. It is safe for sensitive skin, but to truly fit this skin type, a product of this type needs soothing ingredients to help calm redness and irritation.

Can I use this serum with retinol, and in what order?

You can use this serum with retinol by applying the serum first and following with your retinol product. The formula is safe for sensitive skin because it lacks harsh ingredients that could trigger discomfort.

How often should I use it?

You can use this treatment in the evening as part of your routine. The formula is safe for your sensitive skin and is unlikely to cause irritation.

Can this serum clog pores, cause breakouts or purging for sensitive skin?

This serum is unlikely to cause breakouts or clog pores on sensitive skin because it is free of harsh or heavy ingredients that typically trigger irritation or congestion. While it is safe for your skin, it lacks specialized ingredients to actively calm redness and needs extra soothing plant extracts or barrier-repairing ceramides to truly fit sensitive skin.

Is it fragrance-free and alcohol-free?

Yes, it has no fragrance and no drying alcohol.

What the research says

  • Topical palmitoyl pentapeptide (pal-KTTKS) provided significant improvement versus placebo control in the reduction of wrinkles and fine lines in Caucasian female subjects.

    International Journal of Cosmetic Science, 2005

  • Combined therapy using a topical hyaluronic acid-niacinamide-Matrixyl serum and a multimodal facial device decreased TruSkin age by five years and reduced wrinkles more effectively than the serum alone in a 41-year-old woman with moderate facial aging over 12 weeks.

    Cureus, 2026

  • Treatment with Jet-M and GHR formulation greatly decreased wrinkles around the eye and increased collagen production in a 59-year-old male.

    Journal of Cosmetic and Laser Therapy, 2016

  • Topical copper tripeptide complex on CO2 laser-resurfaced skin caused no significant reduction in erythema or objective improvement in wrinkles compared to controls, but significantly increased patient satisfaction regarding overall skin quality.

    Archives of Facial Plastic Surgery, 2006

  • A novel regimen combining a hydroxy acid-based scrub and copper tripeptide serum significantly reduced adherent scalp flaking by 61.24%, increased hair density by 12.48%, increased hair thickness by 25.36%, and improved scalp skin hydration by 76.24% in adults with mild to moderate dandruff over 15 days.

    Cureus, 2024

  • The combination of Thermus thermophilus and Bacillus subtilis mixed-culture ferment extract and copper tripeptide-1 GHK-Cu reduced inflammatory cytokines, protected skin explants from UV-induced damage, and improved wrinkles and skin barrier conditions compared to individual components or controls.

    Skin Research and Technology, 2026

  • Hexapeptide-11 activated proteasome, autophagy, chaperones, and antioxidant response genes, protected fibroblasts against oxidative-stress-mediated premature cellular senescence, and improved skin elasticity in human subjects.

    Redox Biology, 2015

  • Hexapeptide-11 reversibly downregulated ATM and p53 protein expression in intrinsically aged fibroblasts, extrinsically aged fibroblasts, and extrinsically aged dermal papillae cells at concentrations between 0.1% and 1.0% in vitro, thereby influencing the onset of cellular senescence.

    Journal of Cosmetic Science, 2013

  • Topical treatment with cyclized hexapeptide-9 significantly reduced wrinkles and roughness in crow's feet and forehead compared to vehicle, and generally outperformed retinol in healthy volunteers with aging skin.

    Journal of Cosmetic Dermatology, 2025

  • A chemically synthesized homotrimeric collagen peptide exhibited high purity, a stable triple-helical conformation, and excellent thermal stability, while safely enhancing collagen and elastin synthesis in fibroblasts in vitro and increasing skin collagen content, improving skin structure, and enhancing microvessel density in BALB/c mice in vivo.

    Frontiers in Bioengineering and Biotechnology, 2025

  • The addition of soybean peptide and collagen peptide to normal human dermal fibroblasts increased collagen synthesis and gene expression related to collagen formation, with the highest collagen levels observed when both peptides were added together compared to individual additions.

    International Journal of Food Sciences and Nutrition, 2012

  • A multi-modal methodology combining MALDI-MSI, in vivo RCM, echography, and histology revealed age-related decreases in extracellular matrix and epidermal-dermal junction proteins and undulation depth, while a blend of palmitoyl oligopeptide and palmitoyl tetrapeptide-7 improved subepidermal low-echogenic band thickness, density, and extracellular matrix structure compared to placebo.

    Journal of Cosmetic Dermatology, 2015

  • Chronomodulated daytime application of baicalin and nighttime application of palmitoyl tripeptide-1 synergistically improved skin luminance by 16.29%, nasolabial fold depth by -36.35%, and firmness by 24.35% in 30 female participants.

    Journal of Cosmetic Dermatology, 2026

  • Palmitoyl tetrapeptide-7, acetyl hexapeptide-8, palmitoyl tripeptide-1, and palmitoyl tetrapeptide-10 significantly increased type III collagen levels in human dermal fibroblasts following UV exposure, with their combination demonstrating a greater effect in vitro and enhancing type I, III, and IV collagen levels in ex vivo skin tissues compared to individual components.

    International Journal of Cosmetic Science, 2026

Why other serums fit sensitive skin better

Ingredients

Water, Glycereth-26, 1,2-Hexanediol, Butylene Glycol, Glycerin, Arginine, Carbomer, Ethylhexylglycerin, Polyglyceryl-10 Laurate, Adenosine, Caprylyl Glycol, Copper Tripeptide-1, Hexapeptide-11, Hexapeptide-9, Palmitoyl Pentapeptide-4, Palmitoyl Tripeptide-1, Tripeptide-1

Behind this fit score

Lovi calculates every fit score from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.

  • Nadia Kapleva, MS

    Nadia Kapleva, MS

    Co-founder, Medical Director

    Cosmetic chemist, cosmetologist, aesthetic products developer

  • Alexey Shagraev, PhD

    Alexey Shagraev, PhD

    Co-founder, CEO and CTO

    PhD in computer science, 3x US patent holder, ex-Google, ex-Yandex

  • Dr. Sofía Perea Pérez, MD, MSc

    Dr. Sofía Perea Pérez, MD, MSc

    Medical Board

    Aesthetic medicine practitioner, MSc in Longevity and Anti-Aging Medicine

  • Aishani Shah, MD

    Aishani Shah, MD

    Medical Board

    Specialist dermatologist, MBBS, MD, IFAAD

  • Asya Zubkova, MS

    Asya Zubkova, MS

    Medical Board

    Cosmetic chemist, SCS, IFSCC member

  • Hanna Kurets, MD

    Hanna Kurets, MD

    Medical Board, Medical Advisor

    Dermatology MD

  • Elina Nazarenko, MD

    Elina Nazarenko, MD

    Medical Board

    Dermatology and diagnostic consultant

  • Victoria Derkova, MS

    Victoria Derkova, MS

    Medical Board

    Cosmetic chemist, cosmetic development technologist

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Prices checked 10 Oct – 31 Oct 2026

The Lovi Fit is the same in every country; only the stores and prices differ, and the ones here are for Ireland.

How does it fit your skin?

Scan your face, then any product: Lovi shows how well it fits you and what fits even better.

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