Kojic Acid Soap Before and After


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Resolve unwanted skin conditions with kojic acid soap! Almost everyone harbors insecurities about their skin, which is why we invest so much in skin care. From scars to discoloration to age spots, otherwise harmless skin issues can cause a lot of distress in our lives. Skin abnormalities can make us feel antisocial, lessen our confidence, and even cause depressive episodes.

Fortunately, many individuals have experienced dramatic improvement in the appearance of their skin thanks to kojic acid. In this article, we’ll discuss kojic acid, how it works, and how to use it. We’ll also go over some before and after pictures from successful cases. Kojic acid doesn’t work for everyone; but, as an inexpensive solution, kojic acid bears consideration.

What Is Kojic Acid Soap?

Kojic acid soap works just like regular soap, except that it contains a substance present in a variety of fungi and produced as a byproduct of the fermentation process used to create Japanese rice wine, also called saké. One can also find kojic acid in soy sauce. Kojic acid soap may contain other agents that work in tandem with kojic acid to improve results.

In 2010, the independent, non-profit Cosmetic Ingredient Review (CIR) Expert Panel made a determination that cosmetic products containing up to 1% kojic acid are safe for use. Even so, some individuals that use 1% kojic acid soap, like kojie san soap, do experience minor side effects, especially when used on sensitive areas of the skin.

These side effects may include:

  • Rashes
  • Irritation
  • Swelling
  • Itchiness
  • Redness
  • Pain and/or discomfort
  • Susceptibility to sunburn

Before and After

In some cases, the effects of kojic acid use can be quite dramatic. In others, the results prove disappointing. It truly depends on the user’s skin and diligence in applying the acid regularly. Those persons lucky enough to see a noticeable reduction in hyperpigmentation express significant relief and increased confidence. Let’s go over some individual before and after cases:


In the instant case, viewers can see significant scarring caused by past trauma. Over several weeks of kojic acid treatment, however, the discoloration resulting from the scar noticeably dissipates. While the scar remains visible, it has become less eye-catching and distracting.


Here we have a patient experiencing a severe presentation of melasma. However, with regular use of kojic acid, viewers can now barely see that the individual ever had hyperpigmentation at all. After several more weeks of treatment, the patient reported complete resolution of all skin discoloration.

Age Spots

As a common occurrence in individuals advancing in years, age spots represent a familiar skin condition. The age spots on this patient appear moderate to severe in pigmentation. However, with just a few weeks of kojic acid treatment, the age spots seem to have lost over 80% of their pigmentation.

Sun Damage

Sun damage caused by ultraviolet rays remains one of the primary causes of hyperpigmentation, despite all of the scientific literature imploring people to use sunscreen. In this case, the dramatic results point to a 90% reduction in the number of freckles caused by excessive sun damage.

How Does Kojic Acid Soap Work?

As the active ingredient in a variety of soaps available to purchase, kojic acid powder inhibits or prevents the formation of tyrosine, an amino acid, and precursor to melanin. Tyrosinase, a rate-limiting enzyme, speeds up the creation of melanin and other pigments through the oxidation of tyrosine. By inhibiting the formation of tyrosine, kojic acid prevents this process.

By taking tyrosine out of the equation, kojic acid bar soap can have a lightening effect on the skin, especially in damaged areas. Users report the lightening of dark scars, age spots, and other discolorations while using kojic acid soap. But, results do vary; and, two individuals with the same skin condition may not enjoy the same effects of kojic acid.

What Is the Treatment Regimen While Using Kojic Acid?

People suffering from skin conditions use kojic acid in a variety of ways. One can find kojic acid in:

  • Serums
  • Creams
  • Cleansers
  • Soaps
  • Powder form

Individuals who use serums and creams, including skin lightening cream or skin lightening soap, typically leave the substance containing kojic acid on their skin for an extended duration for maximum absorption. However, such treatments, including face masks, should be applied intermittently throughout the year.

Those who use cleansers and soaps wash themselves off in short order and can use said products daily. One can expect to see results after two weeks of use. If positive effects do not manifest within a month, kojic acid may not represent a viable solution for that person.

People who purchase kojic acid in powder form can create their own lotions, creams, etc. However, they do run the risk of making a substance with levels of kojic acid that far exceed safe practices.

Sufferers of skin conditions who have an interest in trying kojic acid should first test a product on the affected area for 30 seconds. If redness, swelling, or irritation occurs, discontinue use.

What Skin Conditions Does Kojic Acid Treat?

Kojic acid has proven effective when treating several different skin conditions. Most individuals use it for hyperpigmentation and scars. But, it has other uses as well. Here are some of the most common skin conditions alleviated by kojic acid:


The main purpose of kojic acid soap is the mitigation of hyperpigmentation, dark skin spots, and other skin pigmentation concerns. Kojic acid has been shown to effectively treat melasma, which is a darkening of the skin caused by sun exposure, genetics, hormones, and minor forms of skin damage. But, it can also resolve hyperpigmentation arising from other causes, such as drug use and medical conditions.

Acne Scars

Users extol the benefits of using kojic acid to treat acne scars. They report seeing a reduction in the discoloration that accompanies scarification within a few weeks of regular, daily use.

Also, many individuals expressed satisfaction regarding the way in which kojic acid treated their current acne breakouts. Kojic acid showed significant efficacy in lessening the number of pimples and blackheads on users’ faces.

Stretch Marks

Kojic acid has proven effective at reducing the appearance of stretch marks caused by rapid growth during puberty, pregnancy, bodybuilding, and hormone replacement therapy. Users report a marked difference in the appearance of their skin within one month of daily use.

For Whom Is Kojic Acid an Appropriate Treatment?

Kojic acid or kojic acid cream serves as an appropriate treatment for anyone experiencing uneven discoloration of the skin. The most dramatic results occur in people who have darker skin, evening out dark areas of hyperpigmentation on the face, neck, hands, armpits, and groin. But, caution is advised when applying kojic acid to sensitive areas of the body, such as the armpits and groin.

People who suffer from sensitive skin in general have an increased likelihood of experiencing a negative reaction from kojic acid use. Those who have a history of skin allergies, heat rash, dermatitis, and other conditions should test their sensitivity level before each application. Kojic acid should not be used on children without a doctor’s recommendation.

What Are the Ingredients for Kojic Acid Soap?

Kojic acid soap contains many of the same ingredients as most soap products available in stores. Aside from kojic acid itself, some of the more common ingredients include:

  • Vegetable glycerin
  • Lye
  • Deionized water
  • Coconut oil
  • Mineral oil
  • Tea tree oil
  • Xanthan gum
  • Fruit extracts
  • Vitamins C and E
  • Color additives
  • Fragrances


What Other Treatments Are Compatible with Kojic Acid?

People who suffer from various skin conditions may wish to speed up results by combining skin treatments. Here are some treatments that enhance the effects of kojic acid, as well as some post-application remedies for dry, irritated skin:

Glycolic Acid

Glycolic acid represents the most commonly used alpha-hydroxy acid (AHA) in high-end skincare products because its small molecular size allows for maximum absorption. When used in conjunction with kojic acid, both acids demonstrate increased efficacy.

Famous for diminishing fine line wrinkles, glycolic acid also:

  • Prevents acne
  • Balances skin tone
  • Exfoliates the skin
  • Smooths skin texture
  • Lightens age spots


Hydroquinone serves as one of the most popular skin-lightening agents on the market. People typically use it to treat dark patches on the skin. When applied alongside kojic acid, users report rapid resolution of skin discoloration.

Hydroquinone has proven efficacious when used to treat:

  • Melasma
  • Age spots
  • Scars
  • Sun damage
  • Discoloration caused by inflammation

Moisturizing Cream

Many users have expressed concern about dry skin after applying kojic acid. So, using a combination of strong skin treatments may increase the likelihood of this side effect. People who apply any of the approved face acids should consider a moisturizing cream, such as one that includes hyaluronic acid, to avoid dry skin.

Hydrocortisone Cream

Many people who suffer from skin conditions are already familiar with hydrocortisone cream. Those who experience itchiness or pain after using kojic acid can apply hydrocortisone cream to soothe the skin and improve healing.


Skin lightening agents should always be applied in conjunction with sunscreen. Many users have experienced photosensitivity of the skin after applying kojic acid, including some who suffered moderate to severe sunburn. Sunscreen becomes even more necessary when using multiple skin treatments.

Do Other Skincare Solutions Exist for the Same Skin Conditions?

Kojic acid has plenty of competition in the skin whitening industry, with products like whitening soap, some of which have already received mention. Many available skincare companies also combine several face acids into one product. Such products include:

Ultra-Potent Brightening Serum

Consisting of hydroquinone, kojic acid, azelaic acid, lactic acid, and salicylic acid, the Ultra-Potent Brightening Serum covers all bases for individuals who wish to reduce the appearance of scars, age spots, and discoloration caused by melasma. Users should apply the serum every other day for two months before taking a one-month break.

Citrus Glow Drops

Citrus Glow Drops reduce minor hyperpigmentation through the use of compounds found in nature. Ingredients include argan oil, rosehip oil, sea buckthorn oil, vitamin C, and vitamin E. Citrus glow drops won’t reduce the appearance of heavy scarring or dark age spots, but they do lighten faint discolorations of the skin.


Kojic acid products, like kojic soap, reduces hyperpigmentation, age spots, and discoloration caused by scarring. In several studies, it has proven effective as a safe product for skin whitening and evening out skin tone. While side effects do exist, most of them remain manageable, and users can continue treatment after they subside. Kojic acid works even better when applied alongside other face acids and whitening agents. Available in several forms, kojic acid continues to show promise for people suffering from various skin conditions and regularly gets prescribed by dermatologists. Kojic acid has shown the skincare industry that it is here to stay for a very long time.