Kojic acid has tendency to oxidize over time; add vitamin E tocopherol or BHT to a formula to reduce oxidation. For external use only. All kinds of skin-lightening products including lotions, creams, fluids, makeup products.
One useful, if obvious, solution to the problem would be to add a preservative such as sodium metabisulphite. Sodium metabisulphite is in a class of preservatives that release sulphur dioxide. This increases the stability of kojic acid noticeably, keeping discolouration to a low level for up to two months.
Kojic acid is relatively easy to work with as it is water soluble. Simply dissolve it into warm water (not hotter than 35 degrees C or it may oxidise) and then it is ready for use! We recommend using deionised water to assist in keeping it stable.
Kojic acid oxidizes on contact with air or light, and when this happens, it turns brown and loses its efficacy (meaning they won't work anymore).
First, kojic acid is not stable to light and heat, and tends to oxidize, which results in color change (often yellow or brown).
Oxidation or degradation of ingredients isn't always harmful, but it can make them less effective, Dr. Chapas said. “Even if it's not going to be harmful to you, it might not be that beneficial to you either,” she added.
To maintain the results, it's important to integrate kojic acid into a continuous skincare routine. Transitioning off kojic acid should be done carefully, and maintaining a good skincare regimen with regular sunscreen use is crucial to prevent darkening.
Kojic acid soaps have an expiration date before it becomes ineffective.
On the other hand, certain ingredients can trigger irritation and should be avoided if you're using kojic acid in your skincare routine. Harsh acids, like alpha-hydroxy acids (AHAs), are a prime example, as well as certain retinoids.
Moisturize: Follow up with a nourishing moisturizer to seal in the benefits of kojic acid and keep your skin hydrated. Sunscreen (AM only): Since kojic acid can increase sun sensitivity, always finish with a broad-spectrum sunscreen during the day.
Solutions of hydroquinone are stabilized against deterioration in color and odor with age by the addition to the solution of small amounts of citric acid. Up to about 1 percent citric acid by weight of the solution may be used, although it is preferred that this amount be between 0.005 percent and 0.05 percent.
Kojic Acid Dipalmitate (KAD) can tend to form a crystal precipitate in some cosmetic formulations. It is recommended to add Isopropyl Palmitate or Isopropyl Myristate to the oil phase containing KAD and heat to 80°C (167°F) and hold for 5 minutes until the KAD dissolves completely.
Antioxidants and free radicals
Antioxidants are found in certain foods and may prevent some of the damage caused by free radicals by neutralising them. These include the nutrient antioxidants, vitamins A, C and E, and the minerals copper, zinc and selenium.
Oil Control
Managing excess sebum production is key to preventing oxidation of blocked pores. Use oil-free or mattifying products formulated to absorb excess oil and keep your skin looking matte and fresh.
Kojic acid also has low stability, being sensitive to light and heat, and labile oxidative properties.
Kojic acid has tendency to oxidize over time; add vitamin E tocopherol or BHT to a formula to reduce oxidation. For external use only. All kinds of skin-lightening products including lotions, creams, fluids, makeup products.
Yes, 2% Kojic Acid Face Serum is highly efficacious in working on sun-damaged skin. What Does 1% Alpha Arbutin in The Derma co kojic acid serum do? 1% Alpha Arbutin works wonders towards fading effects of hyperpigmentation like age spots, acne marks, and melasma.
Skin irritation: Kojic acid can dry and irritate some people's skin, especially if you already have sensitive skin. Allergies: Some people experience allergic reactions to kojic acid, resulting in an itchy and dry skin rash called contact dermatitis.
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Not only does it boast the most Amazon reviews, but this kojic acid skincare product relies on some impressive ingredients to give you cover-shot-worthy skin minus Photoshop.
So ironically, in wanting to protect, your body could lead you to temporarily darken. So, while kojic acid is busy working on inhibiting melanin, your body may be counteracting by stimulating it. A classic battle of skincare wits! But remember folks, this isn't a long-term effect.
Because kojic acid pairs well with most ingredients, it is often combined with other skin-brightening elements (like niacinamide, azelaic acid, vitamin C, and tranexamic acid) to enhance its effects.
Even after a vitamin C serum color has changed, the product is still effective, and the active ingredients remain potent. There are different factors that contribute to serum oxidation such as exposure to air, light, and heat.
This occurs due to a variety of factors, such as the pH levels of your skin, the natural oils on your face, or even the air around you. Oxidation is a common problem for many people, especially those with oily skin or who live in humid environments.