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.
People who develop a rash or irritation when using products containing kojic acid should stop using them immediately. If symptoms do not clear up in a few days, it is best to see a doctor. People should not use kojic acid on skin that is already red or irritated. It should also not be used on broken skin.
Yes, Kojic acid is safe to be used on the skin. Final report of the safety Assessment of kojic acid used in cosmetic is considered safe at the concentration of 2% on leave on products. Though it can be used up to 4% on wash off products like soaps either bar or liquid.
Though kojic acid soaps can work on most skin types, experts say that those with sensitive or dry skin should be cautious as it may sometimes cause irritation. “Those with dry skin may want to opt for soaps with moisturizing properties,” advises Dr. Gohara. “Always do a patch test before using it regularly.”
Kojic Acid can make your skin more sensitive to the harmful effects of sunlight. Hence it is advised to use sunscreen and wear protective clothing while using Kojic Acid. It is recommended to avoid tanning booths and sunlamps.
Kojic acid soap is used to lighten dark spots on the skin caused by hyperpigmentation from acne, melasma, or sun damage. Research shows kojic acid treatments, such as topical serums, can help fade hyperpigmentation.
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.
Kojic acid and derivatives present cytotoxicity to some cancerous cell lines, including melanoma, hepatocellular carcinoma, ovarian cancer, breast cancer and colon cancer. Regarding safety, kojic acid or its derivatives are safe molecules for human use in the concentrations tested.
If you have sensitive or easily irritated skin, Kojic acid may be preferable because it is gentler and less prone to cause irritation. Retinol, on the other hand, may be better suited to people with more robust skin because it might induce early irritation and peeling.
Salicylic acid
It is an exfoliating agent that removes dark spots and acne-causing bacteria along with dead skin cells that can lead to pigmentation.
If you stop using kojic acid, your skin may gradually return to its original state, particularly if the underlying causes of hyperpigmentation are not addressed.
How is alpha arbutin better than kojic acid? It is gentle on the skin: Unlike kojic acid, which can cause stinging, irritation, or redness, alpha arbutin is much milder, making it suitable for all skin types.
One compatible ingredient that can be used with Kojic acid is Vitamin C. When combined, this blend of these active ingredients can boost the skin's brightening and antioxidant effects. Vitamin C helps to further inhibit melanin production and promote collagen.
Is kojic acid safe to use everyday? Yes, kojic acid is safe to use everyday. Depending on your skin's sensitivity, it can be used twice a day. Just remember, don't use kojic acid more than 3 months at a time because that can be damaging to your skin.
Potential Endocrine Disrupting Properties
Data suggests that kojic acid may disturb the synthesis of thyroid hormones by suppression of iodine uptake and subsequent organification (SCCS, 2022; Higa et al., 2002; Tamura et al., 1999).
Kojic acid captures copper ions, preventing the activation of tyrosinase, thus preventing the formation of melanin [12,14]. Due to its tyrosinase-inhibiting activity, KA is considered one of the most effective skin lightening agents in the beauty industry [15].
Yes, but proceed with caution. Combining kojic acid and retinol is already a potent mix. Adding Vitamin C or AHAs/BHAs might stress out your skin more than a pop quiz.
For best results, use it at night, and apply sunscreen during the day to avoid sun damage. Q: Which is better, Kojic Acid or Vitamin C? A: Both ingredients offer unique benefits. Kojic acid is great for reducing dark spots, while Vitamin C brightens the skin and offers protection against environmental damage.
Kojic acid is a whitening agent that diminishes dark spots, age spots, and sun damage. This overall reduction of dark spots and skin reversal impacts skin ageing. Moreover, its anti-melanogenic and antioxidant nature prevents skin ageing and tanning.
Kojic acid was deemed a “quasi-drug” and banned from the market in Japan by the Ministry of Health, Labor and Welfare in 2003 and subsequently in Korea and Switzerland due to safety concerns stemming from animal test results suggesting mutagenicity.
Don't use the kojic acid soap on cut, cracked, or lightened skin conditions. If you have irritated, cut, bruised, cracked, or lightened scars or skin that suffers from loss of pigment such as in vitiligo, then you should avoid using kojic acid.
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.
If you have dry or damaged skin it might be more susceptible to the potential darkening effects of kojic acid. Ensuring your skin is healthy and well-nourished is key to making kojic acid work in your favor. A balanced diet, ample hydration, and a good sleep cycle can all contribute to healthier skin.