Sodium Lactate: What Is It, Skin Benefits, Cosmetic Uses & Side Effects

Priya Singh
Fact-Checker: Priya Singh
This article was last updated on: September 11, 2023
Table of Contents

Delving into the backside of your favorite skincare product can often feel like deciphering an alien language. With an array of technical names, it’s seldom easy to discern what each ingredient does or how it may impact your skin. Sodium Lactate is one such ingredient you may have noticed – lurking amidst a litany of other complex terminologies.

This article aims to demystify this enigmatic ingredient, focusing on its specific functions and why it finds a niche in cosmetics.

What is Sodium Lactate?

Sodium Lactate, also known colloquially as E325, is essentially the sodium salt of lactic acid. Originating from the natural fermentation of sugars in beets and corn, it is often touted as a critical player in cosmetic and skincare formulations.

The general purpose of Sodium Lactate in these products is two-fold. It acts as a superior moisturizer and possesses the unique ability to attract and hold water, functioning as a potent humectant. Moreover, it serves to balance the pH level of a product, credentialing its role as a buffering agent.

Although its performance is consistent across various concentrations, typically, Sodium Lactate is used at levels ranging from 0.5% to 5.0%. It’s worth noting that Sodium Lactate is readily available both as a standalone ingredient and as part of broader skincare formulations. However, it’s crucial to remember that its specific contribution is seamlessly amalgamated with other ingredients when incorporated into multifaceted formulations.

Who Can Use Sodium Lactate?

Given its natural origin and skin-friendly properties, Sodium Lactate is appropriate for a broad spectrum of skin types. Its remarkable moisture-locking ability makes it particularly beneficial for dry and dehydrated skin. Simultaneously, its natural capacity to balance pH is excellent for oily and acne-prone skin as it helps to maintain a favorable acidic environment that discourages bacterial growth.

As Sodium Lactate is produced through the fermentation of plant sugar sources, it is suitable for vegan and vegetarian formulations. Hence, those adhering to vegan or vegetarian lifestyles can incorporate it into their skincare regimes without reservation.

Pregnant and breastfeeding women can also utilize Sodium Lactate-based products, as no documented evidence suggests any potential harm – even still, you should consult with a healthcare professional just to be safe. However, as with any skincare product, individual responses may vary, and discontinuation is recommended if any adverse reaction occurs.

Sodium Lactate Skin Benefits

Sodium Lactate has multiple skin benefits due to its intrinsic properties:

  • Moisturizing: Sodium Lactate plays a significant role as a hydrating agent. By breaking down the molecular structure of water, it enhances the ability of the skin to absorb this vital resource, thereby promoting skin hydration. Its competence as a humectant comes into play here, trapping water within the stratum corneum (the outer layer of skin) and boosting its water content, which results in smoother, softer, and plumper skin.
  • Maintaining pH balance: Another imperative function of Sodium Lactate is its buffering capacity. The skin’s pH is a decisive factor in its health and equilibrium. Sodium Lactate facilitates this balance by regulating the acidity or alkalinity of cosmetic products, which, when applied to the skin, helps to sustain the skin’s natural pH. Proper pH levels are essential to ensure the optimal functioning of enzymes responsible for skin regeneration and collagen synthesis, aiding a youthful appearance.
  • Keratolytic properties: Sodium Lactate also functions in a keratolytic capacity, promoting the shedding of the outermost layers of the skin. It helps accelerate cell turnover, removing dead skin cells and making way for healthier cells. This mechanism aids in improving skin texture, lightening hyperpigmentation, and diminishing the appearance of fine lines and wrinkles with consistent usage.

Do note that these beneficial effects are not a one-time motif. Consistent and sustained usage is crucial in reaping and maintaining the rewards that Sodium Lactate brings to your skincare arsenal.

Sodium Lactate’s Non-active Cosmetic Uses

In addition to having active benefits for the skin, Sodium Lactate also enjoys certain non-active roles within cosmetic formulations:

  • Formulation Stability: Including Sodium Lactate helps maintain the stability of cosmetic formulations. Given its buffering characteristics, it safeguards against pH fluctuations that might otherwise compromise the effectiveness of other active ingredients in the product.
  • Product Life Extension: Sodium Lactate extends the product’s shelf life by supporting the preservation system. It creates an unfavorable environment for microbial growth, thus reducing the chance of contamination and subsequent product spoilage.
  • Texture Enhancement: Sodium Lactate contributes to the overall sensory experience by improving the texture of cosmetic products. It imparts a smooth, velvety feel to the formulation, making the application process more enjoyable for the consumer.

Sodium Lactate Potential Side Effects

When discussing potential side effects, it’s crucial to remember that everyone’s skin is unique and reacts differently to different ingredients. Various aspects, such as the skin’s inherent characteristics, genetic predisposition, environmental factors, and overall health, can influence how one might respond to an ingredient.

Potential side effects or interactions with Sodium Lactate are sparse. However, they may include:

  • Skin Irritation: In rare cases, Sodium Lactate might irritate, leading to itchiness or redness of the skin.
  • Allergic Reaction: While uncommon, individuals hypersensitive to lactic acid derivatives may experience allergic reactions to Sodium Lactate.

In case of experiencing any of the aforementioned side effects, it is advisable to cease using the product immediately. Consultation with a healthcare professional or a dermatologist would be the next prudent step.

Despite these potential side effects, it is essential to note that adverse reactions to Sodium Lactate are relatively rare. From a broader perspective, Sodium Lactate remains a safe and effective ingredient in cosmetic formulations for most users.

Finally, the significance of performing a patch test before the full-scale application of any cosmetic product cannot be overstated. Even ingredients deemed as low-irritating, such as Sodium Lactate, may garner unexpected reactions in a subset of individuals. Our patch test how-to guide provides a method to preliminarily test a product and minimize any potential risk of adverse reactions.

Comedogenic Rating

When evaluated on the comedogenic scale, Sodium Lactate stands proudly with a rating of 0. This signifies that Sodium Lactate is non-comedogenic and is unlikely to clog pores or trigger breakouts. The reasoning behind this low score is twofold. Firstly, Sodium Lactate is water-soluble, making it less likely to stick around and occlude pores.

Secondly, it’s a compelling humectant, which means it aids in moisture retention and prevents the skin from drying out — a condition that could otherwise lead to the overproduction of sebum and increase the potential for breakouts. Thus, Sodium Lactate is suitable even for individuals with acne-prone skin and those susceptible to breakouts.


Achieving a radiant, healthy complexion is seldom the result of a serendipitous stumble upon a miracle product. It often entails a journey of experimentation and a measure of trial-and-error. Sodium Lactate is an intriguing ingredient to explore in this context since it caters to both the non-active and active domains in skincare. Its non-active roles ensure formulation stability and enhance the overall product experience, while its active properties hold immediate benefits for skin health.

Opting for Sodium Lactate-based products could prove advantageous for individuals seeking heightened hydration and improved skin texture. Its ability to maintain pH balance and its keratolytic benefits hold promise across a diverse range of skin types and concerns.

While Sodium Lactate may not hold the limelight as a popular buzzword in the skincare industry, this does not detract from its effectiveness. It is not an avant-garde ingredient but a reliable workhorse in the realm of skincare ingredients, silently powering the efficacy of an array of cosmetic formulations.

However, like numerous other skincare ingredients, Sodium Lactate is not a miracle ingredient; a consistent usage schedule over several weeks is essential for observing significant results, particularly skin texture and hydration improvements.

As for any concerns regarding Sodium Lactate, it’s essential to remember that its side effects are few and far between, and it’s generally deemed safe for use in cosmetic products across a broad spectrum of skin types. However, always remember that, like all skincare, what works brilliantly for one person might not have the same impact for another due to each individual’s unique skin characteristics.

Tell us how you found this article in just a couple of clicks!
Delivered right to your inbox each week. Zero spam, all goodness, opt-out at anytime.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
How did you find this article?
Tell us how you found this article in just a couple of clicks!
Get all our top headlines in beauty.
Delivered right to your inbox each week. Zero spam, all goodness, opt-out at anytime.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Send good feedback:

All feedback is anonymous and will be used to improve the quality of our articles.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Send bad feedback:

All feedback is anonymous and will be used to improve the quality of our articles.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.