
Lactic Acid, an alpha hydroxy acid (AHA) variety, has become increasingly popular in skincare due to its wide range of benefits.
Renowned for its exfoliating capabilities, lactic Acid assists in eliminating dead skin cells, lightening dark spots, and enhancing the look of fine lines and wrinkles.
You can find this versatile ingredient in both over-the-counter skin care products and professional treatments. Lactic Acid is known for its gentle nature on sensitive skin types, setting it apart from other AHAs like glycolic Acid.
Using lactic Acid in your skincare routine can exfoliate and hydrate your skin at the same time. This multitasking ingredient is an excellent choice for those looking to enhance their skincare routine!
Incorporating lactic acid into your skincare routine can produce firmer, brighter, and more youthful-looking skin. To fully harness its potential, using it correctly and at the appropriate concentrations is essential. With its effectiveness and benefits, lactic acid is an excellent addition to any comprehensive skin care regimen.
What is Lactic Acid?
Milk contains lactose, which is used to produce lactic acid. As an alpha hydroxy acid (AHA), it has become a popular ingredient in skincare products due to its antioxidant and chemical exfoliating properties.
Lactic acid is effective in removing dead skin cells, which in turn reveals a brighter, smoother complexion. It can be used on all skin types and has the added benefits of lightening dark spots and improving fine lines and wrinkles.
Fermentation has made lactic acid an active ingredient in many beauty products, providing an excellent option for enhancing skincare routines.
The process of fermentation converts lactose into lactic Acid, allowing it to become an active component in many beauty products. Its gentle exfoliating properties make it a well-loved choice for those looking to enhance their skincare routine. By promoting cell turnover, lactic Acid helps improve skin texture, expands hydration, and can even play a role in addressing acne concerns.
Properties of Lactic Acid
The skin can greatly benefit from the use of Lactic Acid. Its mildness and larger molecule size make it a suitable option for various skin types, including those that are sensitive. Here’s what lactic Acid does best:
1. Exfoliating
- One of the main functions of lactic Acid is to exfoliate and remove dead skin cells. It does that by breaking down bonds between dead skin cells, revealing brighter, smoother skin.
2. Anti-ageing
- With its exfoliating properties, lactic Acid increases cell turnover and eliminates dead skin cells on the epidermis. It can also firm the skin and improve elasticity by promoting collagen synthesis.
3. Anti-microbial
- Lactic Acid can reduce acne breakouts due to its anti-microbial properties, making it suitable for those who suffer from acne-prone or oily skin.
4. Hydrating
- Another added benefit of lactic Acid is its ability to smoothen rough patches and hydrate the skin. As a humectant, it can attract and retain moisture, effectively improving skin hydration.
Effects on Different Skin Types

- Dry skin: Dry skin can benefit from the exfoliating properties of lactic acid. It effectively eliminates dead skin cells and improves the overall appearance by revealing brighter and smoother skin. Additionally, lactic acid can boost the production of NMFs, molecules that attract water to the skin. This hydration effect helps to keep the skin moisturized and healthy.
- Sensitive skin: For those with sensitive skin, lactic acid is an excellent option for exfoliation and brightening. Unlike other AHAs, like glycolic acid, lactic acid is gentle and less likely to cause irritation. It is important, to begin with a low concentration and increase gradually as your skin adjusts to it. With lactic acid, you can achieve the exfoliation benefits without worrying about excessive irritation.
- Mature skin: If you’re seeking a natural solution to minimise the look of fine lines and wrinkles, consider using lactic acid. This substance can boost collagen production, which can help smooth out skin texture and diminish the appearance of lines and wrinkles. Moreover, lactic acid is a viable option for brightening mature skin by hindering melanin production, the pigment responsible for skin colour. However, it’s vital to take precautions when using lactic acid. While it’s generally safe and effective for most mature skin types, it’s critical to start with a low concentration and gradually increase it as your skin adapts. This approach helps to ensure optimal results without causing any irritation or unwanted side effects.
Understanding Lactic Acid Concentrations
Known for its ability to exfoliate the skin, improve the appearance of fine lines and wrinkles, and brighten the complexion, Lactic acid can be found in various skincare products, including serums and creams. The concentration of lactic acid in a product plays a crucial role in determining its effectiveness and potential side effects.
5% Concentration
- If you have sensitive skin or are new to AHAs, it’s best to opt for products with lower lactic acid concentrations, usually around 5%. These formulations offer a gentle exfoliation that can improve skin hydration and provide a mild brightening effect. It’s a great way to ease your way into the world of AHAs without causing any irritation.
10% to 12% Concentration
- Higher concentrations, such as 10% to 12%, are more effective at enhancing skin’s firmness, smoothing its texture, and reducing the appearance of age spots and hyperpigmentation. It is also known that using a 12% lactic acid concentration results in firmer and thicker skin.
30% to 50% Concentration
- In addition to creams and serums, lactic acid is also utilised in professional treatments like chemical peels, where concentrations can be notably higher, ranging from 30% to 50%. It is important to note that only licensed professionals should perform these treatments, as the stronger exfoliation and increased risk of side effects that come with higher concentrations require expert supervision. Verifying that your skin can handle the chosen concentration before using a high-concentration product is crucial.
The concentration of lactic acid in a skincare product is a key factor to consider when selecting the most suitable option for your skin type and specific concerns. It is advisable to start with a lower concentration and gradually increase as your skin builds tolerance. As always, following the recommended usage instructions and consult a dermatologist if you are unsure which concentration will best suit your needs is essential.
Potential Side Effects Of Lactic Acid
One potential side effect of lactic acid use is irritation. It can occur on the skin and may manifest as redness, itchiness, or a mild burning sensation. This is because lactic acid works by breaking down the bonds between dead skin cells, which can expose more sensitive skin underneath. For most people, this irritation is mild, temporary, and should subside as the skin gets used to the treatment.
- Redness: is a possible side effect of lactic acid treatment and can result from the irritation mentioned above. This is especially noticeable in individuals with fair or sensitive skin, as the exfoliating effect can cause facial blood vessels to dilate, leading to temporary redness. If redness persists, it may be necessary to consult with a dermatologist or decrease the frequency of lactic acid application.
- Burning: users may also experience a burning sensation. This sensation is typically mild and normal for most, as it indicates the product is working to exfoliate the skin. However, if the burning sensation is severe or continues throughout the entire treatment, it may be a sign that the product is too strong or not suitable for one’s particular skin type.
- Peeling: is another possible outcome, especially with higher-strength lactic acid products or with extended use. This can be a normal side effect in some cases, as the process of exfoliating the top layers of dead skin cells naturally results in some peeling.
Precautions and Advice When Using Lactic Acid

To ensure the safe and effective use of lactic acid in your skincare routine, it is important to take certain precautions and seek expert advice.
Consulting a dermatologist is highly recommended in order to determine the appropriate concentration and frequency of lactic acid use for your specific skin type and concerns. This will help you avoid any potential complications and ensure that you achieve the best possible results for your specific skin type and concerns.
Perform a patch test before applying lactic acid to your face or body. This simple step can help identify any adverse reactions or sensitivities to the ingredient. To conduct a patch test, gently apply a small amount of the lactic acid product to a discreet area of your skin, such as behind your ear or on your inner wrist. Afterwards, carefully observe the area for any signs of redness, itching, or irritation for the next 24-48 hours. Your skin deserves the best care possible, so take the time to patch test before use.
Lactic acid can increase skin’s sensitivity to the sun, so it is vital to use a broad-spectrum sunscreen with an SPF 30 or higher during the day to protect the skin from sunburn and damage. Additionally, it is essential to wear protective clothing, such as wide-brimmed hats, and avoid prolonged sun exposure while using lactic acid to further protect the skin from sun-related complications.
For best results when using lactic acid, carefully follow the instructions on the product label. Start with a lower concentration and gradually increase it as your skin tolerates. During the initial phase of use, apply a small amount of lactic acid to observe how your skin responds. If you experience irritation or excessive dryness, reduce the frequency of application or consult a dermatologist.
To sum it up, it’s important to be careful and get expert guidance when using lactic acid in your skincare routine. Keep an eye on how your skin reacts and make adjustments as needed to get the best possible results.