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2026/03/19
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Many people desire bright and clear skin. In particular, they want to lighten their facial tone and make their skin appear more transparent. To achieve these goals, there are various options available, from whitening injections at clinics to home care products. Among these, products containing glutathione have gained significant popularity both domestically and internationally.
Recently, Korean beauty brands featuring glutathione as a key ingredient have been receiving increased attention. These products are popular not only among domestic consumers but also with international tourists. Today, we will take a detailed look at the components of various home care products aimed at skin whitening and the proper methods of use.
The Synergy of Glutathione and Vitamin C Combination

Glutathione is a powerful antioxidant naturally produced by our bodies. This ingredient is used as a key component in whitening injections because it may help improve skin tone. Many clinics administer glutathione injections, which can contribute to skin fatigue recovery and overall improvement in skin brightness.
Interestingly, the real secret to whitening injections lies not in glutathione alone, but in its combination with vitamin C. When the antioxidant effects of these two components work together, you can expect more effective results than using either individually. Therefore, when selecting home care products, it is important to check whether these two ingredients are included together.
The Role of Key Whitening Ingredients

Cosmetics aimed at whitening contain various active ingredients. Niacinamide (Vitamin B3) can help improve skin tone and works more effectively when applied directly to the skin than when taken orally. Panthenol (Vitamin B5) can make skin appear brighter and more vibrant through its moisture absorption and retention functions, rather than providing direct whitening effects.
Vitamin C (ascorbic acid) is also an important whitening ingredient that can help improve skin tone through its antioxidant effects. Tranexamic acid is an ingredient also known as a treatment for melasma and can be beneficial even at low concentrations in cosmetics with consistent use. Moisturizing ingredients such as ceramides are also included to help maintain a healthy skin barrier.
Limitations of Home Care and Methods to Improve Skin Absorption

Our skin has a basic barrier function that defends against penetration by external substances. Therefore, even cosmetics containing excellent ingredients have limited absorption rates. Unlike injections or oral medications at clinics, the effects of home care products are gradual, but they hold great value in terms of consistent management.
One method to improve absorption rates is to utilize a microneedle roller (MTS). Using MTS creates tiny micro-channels in the skin, allowing the active ingredients in cosmetics to penetrate more deeply. However, for safety, when using at home, a needle length of approximately 0.25mm is recommended.
How to Use Microneedle Rollers (MTS) and Precautions

The MTS application is relatively simple. Gently roll the MTS over clean skin, creating temporary micro-irritation on the skin. Some redness and sensation at this time are normal reactions. When you apply cosmetics after MTS treatment, the absorption of active ingredients significantly increases. If you have already undergone a treatment, using ampoules or essences after MTS will be even more effective.
- Metal Allergy Caution: If you have experienced itching or redness from earrings or necklaces, avoid using MTS.
- Single-Use Only: MTS is disposable and should not be reused. Bacteria and fungi can proliferate during storage.
- Safe Length: For home use, products with short needles of approximately 0.25mm to 0.5mm are recommended.
- Gentle Treatment: It is important to roll gently without any pain sensation.
Timing of Home Care Product Use After Procedures
When using whitening products after laser or other skin procedures, timing should be adjusted depending on the type of procedure. For non-invasive lasers that do not damage the skin epidermis, it is generally fine to use whitening ampoules or essences immediately after cleansing if there is no stinging sensation.
However, if you have undergone procedures that cause skin wounds, such as mole removal or dermapen, it is advisable to avoid using products with strong active ingredients for at least 1-2 days. This is because high concentrations of ingredients can be excessively absorbed when the skin barrier is compromised, causing chemical irritation. Especially vitamin C or vitamin A-based products should be used after the skin has sufficiently recovered.
How to Use Home Care Devices
Many people purchase home care devices such as ultrasonic or radiofrequency machines but leave them unused. These devices are very effective when used together with MTS. After providing micro-stimulation to the skin with MTS, applying whitening ampoules or essences and gently massaging with a radiofrequency or ultrasonic device makes ingredient absorption much more efficient.
While the energy intensity is lower than professional devices used in clinics, they can be sufficiently helpful in promoting absorption. Using a device for massage is more uniform and safer in improving absorption compared to manually tapping the product into the skin.
The Importance of Consistent Home Care
Skin whitening and tone improvement cannot be completed with a single procedure. Daily and consistent home care is very important. Of course, the effects of cosmetics are not as dramatic as clinic injections or oral medications, but continuous management can help with skin regeneration and texture improvement.
By selecting products containing beneficial ingredients such as glutathione, vitamin C, and niacinamide, and using them together with MTS or home care devices, you can maximize skin improvement effects. However, since skin responses may vary depending on skin type and condition, if you have any questions or skin concerns, consultation with a professional medical provider is recommended.
Source:https://youtu.be/Webl3-Rk7uE?si=8eANNte9xz0OgzyH
UHCELL Dermatology Gangnam (formerly Dr.Petit Dermatology Gangnam)
