DayOne Clinic
  • DAYONE
    The First Day
    Your Beauty Begins
    We treat every moment
    with the same sincerity
    as the very first day.
Doctors
  • Joong-Soo Kim,MD
    Family Medicine Specialist
    Chief Director, DayOne Clinic (Gangnam Main Branch)
      Key Doctor, MERZ Korea (Ultherapy, Xeomin, Belotero)
      Key Doctor, Galderma Korea (Restylane)
      Key Doctor, ILOODA (Secret RF)
      Key Doctor, Venus Concept (Venus Viva)
      Former Director, 365mc Shinsa Surgery Center
      Former Director, Yejimimo Clinic (Konkuk University Branch)
      Former Dermatology Director, Wonjin & Hengtai Group Aesthetic Hospital, Tianjin, China
      APAC Golden Record Award Recipient

      Profile Registration Date: 2026.05.07

  • Ji-Hyun Lee,MD
    Family Medicine Specialist
    Director, DayOne Clinic (Gangnam Main Branch)
      B.S. in Life Sciences, Ewha Womans University
      M.D., Jeju National University College of Medicine
      Residency Training, Seoul National University Hospital
      Full Member, Korean Society for Laser, Dermatology & Hair
      Full Member, Korean Society for the Study of Obesity

      Profile Registration Date: 2026.05.07

  • Seung-Hwan Yang,MD
    Emergency Medicine Specialist
    Director, DayOne Clinic (Gangnam Main Branch)
      Former Director, Kyung Hee Medical Center
      Former Director, Cheonan Chungmu Hospital
      Former Physician, Incheon Nazareth International Hospital
      Full Member, Korean Society of Aesthetic Plastic Surgery
      Full Member, Korean Society for Aesthetic Plastic Laser Medicine
      Full Member, Korean Society of Obesity & Body Contouring
      M.D., Kyung Hee University College of Medicine
      Internship & Residency Training, Kyung Hee University

      Profile Registration Date: 2026.05.07

  • Jong-Ho Jung,MD
    Doctor
    Director, DayOne Clinic (Gangnam Main Branch)
      Former Director, Yeppeum Clinic (Gangnam Main Branch)
      M.D., Kyung Hee University College of Medicine

      Profile Registration Date: 2026.05.07

  • Dong-Ho Yun,MD
    Family Medicine Specialist
    Director, DayOne Clinic (Gangnam Main Branch)
      Former Director, BLS Clinic (Main Branch)
      Member, Korean Society of Obesity & Aesthetic Medicine
      Former Director, Yeppeumjuui Clinic (Gangnam Main Branch)
      Member, Korean Academy of Filler
      Internship & Residency Training, Severance Hospital, Yonsei University College of Medicine
      Member, Korean Society of Aesthetic Medicine
      Board-Certified Specialist, Severance Hospital, Yonsei University College of Medicine
      Member, Korean Society of Clinical Aesthetic Medicine
      Member, Korean Society for Aesthetic Plastic Laser Medicine
      Member, Korean Society of Skin, Obesity & Plastic Surgery
      Member, Korean Society for Laser, Dermatology & Hair

      Profile Registration Date: 2026.05.07

Lifting
DayOne Ultherapy Prime
Sagging begins at the SMAS layer.
Ultherapy is a premium ultrasound-based treatment that precisely delivers
energy to the deep structural layer, lifting and tightening from within.
  • POINT 01
    Precise Assessment
    A one-on-one consultation evaluates the direction and degree of
    sagging, along with the exact depth of the SMAS layer, to establish a
    tailored treatment plan.
    POINT 02
    Refined Design
    Each shot is strategically placed at the right depth and position,
    considering both sagging and volume loss.
    POINT 03
    Safe Energy Control
    Treatment is performed with real-time visualization of skin thickness, SMAS,
    and fat layers, minimizing side effects such as unwanted volume loss.
    POINT 04
    Defined Lifting Results
    Lifts sagging areas and refines the jawline for a clearer, more defined
    contour—without unnecessary hollowing.
The Doctors of DayOne Clinic
Recognized by MERZ Aesthetics for their extensive clinical experience
and refined treatment outcomes,
our doctors serve as official Key Doctors and are continuously invited to
lead clinical training and symposiums worldwide.
Speaker at Mertz MEX Symposium
Speaker at GAIN Symposium
DayOne Thermage FLX
As aging progresses, collagen and elastin decline
—causing the skin to thin, lose elasticity, and gradually sag.
Thermage FLX delivers radiofrequency (RF) energy deep into the dermis,
stimulating tissue renewal and collagen remodeling to restore firmness and lift.
  • POINT 01
    Balanced Energy Delivery
    Energy is precisely calibrated based on variations in
    skin thickness and elasticity across the face—delivering
    only what is needed, evenly and effectively
    POINT 02
    Skin-Respecting RF Lifting
    Radiofrequency energy is optimized to minimize
    unnecessary stimulation while promoting natural, healthy skin renewal.
    Safe for delicate areas, including around the eyes,
    and backed by FDA clearance.
    POINT 03
    Smoother, More Even Lifting
    A larger tip area allows for broader energy coverage
    in each pass—reducing treatment time while delivering uniform
    firmness across the entire face.
DayOne TuneFace
If Ultherapy targets the structural SMAS layer,
and Thermage focuses on improving skin elasticity,
TuneFace delivers energy to the mid-dermis and fat layer—
enhancing lifting, firmness, and skin texture all at once.
A multi-layer RF treatment designed for comprehensive rejuvenation.
  • POINT 01
    Refined Contours & Natural V-Line
    Sagging areas are gently lifted, smoothing the facial
    lines and creating a cleaner, more defined contour.
    POINT 02
    Enhanced Firmness & Elasticity
    Increased dermal density improves overall skin firmness,
    leaving the skin tighter and more resilient.
    POINT 03
    Softening of Fine Lines
    Delicately reduces fine lines in thinner, more sensitive areas
    such as the cheeks and nasolabial folds.
    POINT 04
    Improved Pores, Texture & Tone
    As dermal density increases, pores appear tighter,
    skin texture becomes smoother, and overall tone looks
    clearer and more even.
DayOne AirJet
AirJet uses high-pressure air energy to deliver active ingredients
evenly into the scalp and skin—without needles.
A gentle yet effective lifting treatment that enhances firmness across delicate areas,
including around the eyes, under the cheekbones, and around the mouth.
  • POINT 01
    Detail Lifting for Delicate Areas
    Targets fine lines around the eyes, under the cheekbones,
    and around the mouth—enhancing firmness and density in thinner skin.
    POINT 02
    Immediate, Low-Downtime Results
    Delivers visible lifting with minimal discomfort and little to no bruising.
DayOne 50–80 Lifting
A lifting strategy designed for your age—
refined, balanced, and tailored to how your skin changes over time.
  • After your 50s, aging involves sagging,
    volume loss, and changes
    in skin quality—together.
    At DayOne, treatments are tailored through one-on-one consultation,
    with a precise plan and refined touch-ups for natural results.
The same treatments can deliver
completely different results
depending on the sequence.
For patients in their 50s and beyond,
restoring structure comes before lifting.
  • POINT 01
    Thread Lifting
    Physically lifts sagging tissue
    Instantly improves facial contours
    Reduces the need for volume-based treatments
    Before Thread Lifting
    After Thread
  • POINT 02
    Volume Refinement (Filler / Fat / Collagen)
    Restores volume only where needed
    Enhances fullness naturally—without overcorrection
  • POINT 03
    Skin Renewal & Pigmentation Correction
    Smooths fine lines with skin boosters
    Reduces age-related pigmentation with laser treatments
Fillers / Botox / Contouring Injections
Fillers
  • Hyaluronic acid–based fillers restore volume
    and smooth out lines, enhancing facial
    contours with natural-looking results.
  • Fine lines
    (under eyes, nasolabial
    folds, marionette lines)
  • Contour
    (forehead, nose, chin,
    jawline)
  • Deep wrinkles
Botox
  • Botox relaxes overactive muscles to smooth
    wrinkles and refine facial contours with
    natural-looking results.
  • Expression lines
  • Muscle balance
  • Subtle lifting
  • Improved
    Volume & Harmony
Contouring Injections
  • Precisely delivered fat-dissolving solutions
    reduce unwanted volume—refining facial
    contours and creating a slimmer, more defined look.
  • Jawline & cheek
    contour
  • Slimmer
    facial profile
  • Reduced puffiness
  • Improved
    contour balance
Stem Cell / Skin Boosters
Stem Cell
Supports the skin’s natural ability to repair itself.
  • Highly purified from your own cells
    Growth factors help restore skin tissue
    Minimizes cellular damage,
    inflammation, and aging signs
  • NovaStem Stem Cell
    A high-concentration regenerative treatment that isolates stem cells,
    immune cells, and growth factors from your own blood and delivers them
    precisely where needed.

    Injected into the dermis, muscle, or vascular layers, it supports tissue repair,
    enhances regeneration, and improves brightness, firmness,
    and overall skin vitality.
Rejuran
  • Strengthens the skin from within—
    not just the surface.
    A dermal regeneration solution that restores damaged skin
    and barrier function, bringing back hydration, firmness, texture,
    and natural radiance.
PN (Polynucleotide),
the key component of Rejuran, supports skin regeneration,
reduces inflammation, and helps restore the skin barrier.
  • Skin barrier
    repair
  • Improved
    regeneration
  • Collagen
    stimulation
  • Increased
    skin thickness
  • Fine lines,
    firmness & texture
Hyaluronic Acid
  • Deep hydration that instantly replenishes
    moisture from within.
    Quickly relieves dryness and tightness while delivering
    long-lasting hydration—improving fine lines and restoring a smooth,
    radiant complexion.
  • Instant hydration
    Smoother texture
    Radiant glow
    Fine lines
    Barrier support
Exosome
  • Rich in growth factors, cytokines, amino acids,
    and anti-inflammatory components,

    it enhances regeneration, firmness, and overall
    skin tone—
    gently, even for sensitive skin.
A nano-sized messenger that
supports cellular communication and skin repair.
  • Dermal regeneration
    Collagen & elastin support
    Improved firmness
    Smoother texture
    Calmed, clearer skin
    Balanced skin tone
Sculptra
  • Natural firmness that builds over time.
    Powered by Poly-L-Lactic Acid (PLLA), it stimulates
    collagen deep within the skin—gradually restoring volume,
    improving texture, tone, and pores for long-lasting results.
Subtle at first, solid over time
  • Gradual
    improvement
    over time
  • Structural firmness
  • Natural volume
    without overfilling
  • Lift, volume &
    firmness
Juvelook
  • Powered by PDLLA to stimulate collagen and
    combined with hyaluronic acid (HA),
    it delivers a dual-action formula for
    hydration and firming.
A regenerative booster that restores structural elasticity.
  • Micro-volume enhancement
    Collagen regeneration
    Pores & fine lines
Pigmentation / Pores / Scars
Pico Toning
At DayOne, we use the FDA-cleared PicoWay system.
With dual wavelengths (532nm & 1064nm), PicoWay precisely targets pigmentation
from the epidermis to deeper dermal layers.
  • POINT 01
    Ultra-Fast Picosecond Energy
    Breaks down pigment precisely while minimizing damage
    to surrounding skin.
    POINT 02
    Dermal Remodeling Without Damage
    Uses photoacoustic energy to stimulate healthy dermal
    regeneration—without ablating the skin.
    POINT 03
    Collagen Renewal
    Pico fractional technology promotes collagen regeneration,
    improving acne scars, enlarged pores, and skin texture.
Genesis
A 1064nm long-pulse laser that delivers controlled heat deep into the dermis
—stimulating collagen remodeling and improving
pigmentation, redness, pores, and skin texture in one treatment.
  • POINT 01
    All-in-One Skin Laser
    Improves redness, pores, fine lines, and overall skin
    tone in a single treatment.
    POINT 02
    Precise Deep Dermal Delivery
    Long-pulse technology delivers heat energy deep into
    the dermis with accuracy and consistency.
    POINT 03
    Texture & Barrier Renewal
    Collagen activation strengthens the skin barrier—
    restoring firmness and smoother texture.
Max-G
  • Even-toned skin, powered by light.
    A dual-band filter–based IPL system that targets pigmentation
    (melasma, spots, freckles), vascular concerns
    (redness, acne erythema, visible vessels), and loss of firmness—
    all in one treatment.
  • DSS Auto
    Energy Control
    Auto-adjusts energy
  • Advanced Cooling
    Protection
    Protects the epidermis
  • Minimized
    Skin Damage
    Reduces skin stimulation
  • Deep
    Dermal Firmness
    Boosts collagen
Secret RF
  • Regenerative energy that works beneath the surface.
    A fractional microneedle RF treatment that delivers energy directly
    into the dermis—stimulating the skin’s natural repair process and
    boosting collagen and elastin production.
    • Pore tightening
    • Wrinkle improvement
    • Redness reduction
    • Scar treatment
A smart fractional treatment with minimal discomfort and fast recovery
  • Dermal Collagen
    Remodeling
    RF energy stimulates
    collagen and elastin
  • Acne Scars, Pores
    & Texture
    Improves scars, pores,
    and uneven skin
  • Adjustable
    Needle Depth
    Customized depth for
    precise treatment
  • RF + Microneedle
    Synergy
    Combined energy for stable,
    effective results
PDT
Supports the skin’s natural ability to repair itself.
  • Sebum control, guided by light.
    A targeted acne treatment that applies a photosensitizing agent
    followed by a specific wavelength of light
    —selectively reducing overactive sebaceous glands
    and acne-causing bacteria.
  • Root-cause control
    Selective action on sebaceous glands & inflammation
    No oral medication required
    lti-concern acne improvement
Agnes
  • A targeted RF treatment that uses an
    insulated micro-needle to deliver energy directly
    to sebaceous glands—selectively destroying
    the root cause of acne.
    Precise targeting of problem areas
    Effective for persistent and recurrent acne
    Proven safety (KFDA & CE certified)
A solution that directly targets the root cause of recurring acne
  • STEP 1Identify the Cause
    Assesses excess
    sebum and clogged pores.
  • STEP 2Initial Clearing
    Reduces sebum to
    improve treatment response.
  • STEP 3Sebaceous Targeting
    Precisely treats
    sebaceous glands with
    an insulated micro-needle.
  • STEP 4Residual Care
    Clears remaining sebum
    and inflammation
    to reduce recurrence.
Body Contouring
TuneBody
A body contouring treatment that combines RF (thermal energy) and acoustic energy
to effectively disrupt and break down fat cells.
  • POINT 01
    Precise Contour Refinement
    Targets fat cells selectively without affecting surrounding
    tissues—allowing safe, detailed contouring of areas like the underarms,
    accessory breast, knees, and calves.
    POINT 02
    Advanced Body Contouring
    Reduces fat cells while smoothing cellulite—creating a slimmer,
    more defined body silhouette.
Body Ultherapy
A body contouring treatment that combines RF (thermal energy) and acoustic energy
to effectively disrupt and break down fat cells.
  • Ultrasound energy delivered precisely to the
    depth you need.
    Using multiple handpieces, energy is targeted from the dermis to the
    subcutaneous fat and SMAS layer—optimized for each body area.
    Customized Depth & Energy
    Tailors depth and intensity based on fat thickness—naturally
    reducing volume in areas like the abdomen, arms, and thighs.
    Cellulite, Firmness & Laxity
    Ultrasound energy disrupts fat and tightens deeper layers—
    improving cellulite, firmness, and skin laxity in one treatment.
A smart fractional treatment with minimal discomfort and fast recovery
  • Long-Lasting Lift
    Results last from 6
    months up to 1 year+
  • Collagen Remodeling
    Stimulates collagen
    for skin renewal
  • Non-Invasive Treatment
    Minimal downtime,
    immediate return to daily life
Body Sculptra
  • Restores volume by stimulating your body’s own
    collagen production—gradually enhancing fullness
    and firmness over time for long-lasting results.
    PLLA (Poly-L-Lactic Acid)
    Stimulates natural collagen production
    Gradual volume & firmness improvement
Natural curves, not artificial volume
  • Natural Contours
    Gradual, collagen-based
    volume without overfilling
  • Multi-Dimensional
    Improvement
    Enhances volume, firmness,
    and skin texture
  • Fluid, Natural Curves
    Smooth, natural lines that
    move with your body
  • Long-Lasting Firmness
    Collagen-driven results
    that remain stable over time
S-Fit Injection
Reduces fat cell size and breaks down fat cells
—delivering visible, long-term contour reduction.
By refining surrounding fibrous tissue and waste buildup,
it helps reduce swelling and creates a smoother, more defined body line.
  • Recommended For
    Those who want targeted slimming in specific areas
    Those seeking fat reduction without surgery
    Those struggling with stubborn fat despite diet
    and exercise
    Those looking for a safe approach to fat reduction
  • No Steroids / No PPC
    Gentle formula with reduced irritation and enhanced results
  • Fast Recovery
    Minimal swelling or bruising with a quick return to daily life
  • Targeted
    Treatment Areas
    Treat only the areas you need for precise contour refinement
Aesthetic Care
Ionzyme
  • Deep nourishment beyond the surface.
    A dual technology of iontophoresis and ultrasound enhances absorption—
    delivering vitamins, antioxidants, and hydrating ingredients closer to
    the dermis for immediate skin recovery.
  • Customized by Skin Condition
    Tailored formulations
    based on tone, texture,
    and sensitivity
  • Barrier-Focused Care
    Strengthens
    the skin barrier
    for healthier skin function
  • Gentle, No-Downtime Care
    Comfortable treatment
    with no swelling or
    interruption to daily life
  • Post-Treatment Recovery Boost
    Enhances recovery
    after laser and
    lifting procedures
HydraFacial
  • A 3-step renewal treatment for exfoliation,
    pore cleansing, hydration, and nourishment—at once.
    Using patented vortex technology, it gently removes impurities and
    excess sebum while infusing high-concentration moisture and vitamins
    deep into the skin.
    Suitable even for dry, sensitive skin, with immediate visible clarity
    and hydration.
  • Pore cleansing
    blackhead care
  • Smoother
    texture
  • Deep
    hydration
  • Improved
    tone
  • Sensitive skin
    soothing
  • Fine lines
    radiance
WiQo Uno
  • An acid-based skin remodeling program that
    restores firmness, regeneration, and barrier function.
    A needle-free booster that delivers active ingredients deep into the
    skin—without pain or bruising—revealing smoother texture, improved
    elasticity, and natural radiance.
  • Recommended For
    Dull, rough skin tone and texture
    Sensitive skin that cannot tolerate strong peels
    Those seeking improvement in fine lines,
    firmness, and radiance
    Dry, tight skin with a weakened barrier
    Those looking to enhance recovery after lifting
    or laser treatments
    When skin looks especially tired and fatigued
LDM
Dual ultrasound care that restores skin balance.
High-frequency ultrasonic waves—over 1 million vibrations per minute
—stabilize the skin from deep within.
  • 3-Step Care: Soothing, Repair, Firming
    Adjustable frequencies address acne, redness, sensitivity,
    and loss of firmness.
    Deep Repair Without Heat
    No thermal damage—safe for sensitive, acne-prone,
    and post-treatment skin.
    Moisture Balance Regulation
    Normalizes hydration levels to reduce redness and swelling
    while restoring the barrier.
    Enhanced Treatment Synergy
    Supports faster recovery after laser and lifting procedures.
ThermActive
A premium recovery program that uses gentle micro-thermal energy to stimulate circulation
—helping reduce swelling, relieve fatigue, and restore firmness.
  • 38–42°C Micro-Thermal Activation
    Gently stimulates circulation and lymphatic flow at a comfortable,
    non-heating temperature.
    Instant Relief for Swelling & Fatigue
    Reduces facial heaviness and morning swelling with quick,
    noticeable improvement.
    Enhanced Lifting Lines
    Activates dermal elastic fibers to restore soft yet defined firmness
    Ideal Post-Treatment Recovery
    Comfortable without excess heat—supports faster recovery and
    longer-lasting results after lifting, fillers, or laser treatments.
  • Recommended For
    Those who experience facial swelling as the day goes on
    Those with dull skin from lack of sleep or stress
    Those looking to restore lost firmness gently
    Those who prefer comfortable, low-intensity treatments
    Those seeking faster post-treatment recovery
    Those with dry, dull-looking skin