Soybean Peroxidase: What Is It, Skin Benefits & Side Effects

This article was last updated on: October 9, 2023

The world of cosmetics can often seem like a dense jungle of bewildering scientific terms and esoteric ingredient names. From common names like Retinol to complex jargon like Glyceryl Stearate, it can be daunting to decode the composition of your favorite skincare products.

One such ingredient that is sometimes quietly tucked away within product ingredient lists is Soybean Peroxidase, a name that might bring back memories of high school chemistry lessons.

This article aims to unravel the mystery surrounding Soybean Peroxidase, delving into the science behind this ingredient to understand why it is used in cosmetic products – we’ll explore what Soybean Peroxidase is, its roles, and the potential side effects it may have on your skin.

What is Soybean Peroxidase?

Also known as Glycine Max Peroxidase, Soybean Peroxidase is an enzyme that originates from the seed coat of soybeans. Serving as a catalyst in the oxidation of various compounds, it plays a vital role in neutralizing harmful oxidative elements in cosmetic formulations.

When we talk about oxidation, we’re referring to the process that transforms stable substances into unstable ones, which can lead to a deterioration of the cosmetic product or even, when applied, harm the skin. Soybean Peroxidase acts as an antioxidant, swooping in to stabilize these potentially damaging compounds and preserving the integrity of the product.

Soybean Peroxidase also holds a ‘skin conditioning’ tag, which suggests its ability to enhance the appearance and feel of skin.

Regarding concentration, Soybean Peroxidase is usually part of a more comprehensive formulation of ingredients rather than a stand-alone product. The exact concentration can vary depending on the specific product, but standard inclusion ranges from around 0.1% to 4%.

Who Can Use Soybean Peroxidase?

Soybean Peroxidase is a versatile ingredient suitable for all skin types, from dry to oily, and even sensitive skin. Its antioxidant and skin conditioning properties can benefit a broad spectrum of skin needs.

This ingredient is also suitable for vegans and vegetarians, as it is derived from soybeans, a plant source.

As for pregnant or breastfeeding women, there’s currently no evidence to suggest that Soybean Peroxidase poses any risk, however, research on this exact topic is somewhat limited. As with any skincare product, it’s always advisable to consult with a healthcare provider in such conditions before introducing new ingredients into your skincare regimen.

Soybean Peroxidase Skin Benefits

Soybean Peroxidase delivers a duo of benefits to the skin. Let’s dive a little deeper into these effects and understand how they come to life:

  • Antioxidant Power: As an antioxidant, Soybean Peroxidase helps combat oxidative stress caused by environmental aggressors like pollution and UV radiation. When these external factors hit our skin, they generate reactive molecules known as free radicals, which can damage skin cells, accelerating the process of aging. Soybean Peroxidase steps in here, neutralizing these harmful free radicals and thus curtailing their destructive potential. This action aids in maintaining the health and vitality of our skin.
  • Skin Conditioning: Besides its antioxidant role, Soybean Peroxidase is a skin conditioning agent. It helps to enhance the appearance and feel of the skin, leaving it smoother and softer. This is achieved by facilitating the skin’s natural shedding process, removing dead skin cells from the surface, and promoting the emergence of fresh, new cells. As a result, the skin appears more radiant and rejuvenated.

It’s important to note, however, that the beneficial effects of Soybean Peroxidase, like any other skincare ingredient, are not permanent. Consistent use is vital to maintaining the positive effects on the skin.

Soybean Peroxidase Potential Side Effects

When it comes to skincare, it’s crucial to remember that reactions to ingredients can vary widely from person to person. This variability is primarily due to differences in individual skin types and sensitivities. Understanding your skin type is a vital first step towards predicting how your skin may respond to specific ingredients. To identify your skin type, check out our helpful guide here.

Given the potential variability in skin reactions, it’s pertinent to be aware of the potential side effects and interactions of Soybean Peroxidase:

  • Allergic reaction: Some people may be allergic to soybean peroxidase, which manifests as redness, itching, swelling, or skin discomfort.
  • Sensitivity: Even without a full-blown allergic reaction, some individuals may experience skin sensitivity or irritation from Soybean Peroxidase, particularly if they have overly sensitive skin.

Action should be taken immediately if you experience any of these side effects. The immediate step would be to discontinue using the Soybean Peroxidase product and wash the area with water. If the symptoms persist, seeking medical advice is advisable.

However, it’s essential to note that side effects from Soybean Peroxidase are generally rare. It’s a plant-derived ingredient typically well-tolerated by most skin types, and when used in the correct dosage and manner, it is safe and effective.

Finally, an essential practice to reduce the risk of undesirable effects from any cosmetic product is performing a patch test before applying it fully. This involves applying a small amount of the product on a patch of skin and observing for any adverse reactions over 24 to 48 hours. Check out our comprehensive patch testing guide for a detailed process walkthrough.

Comedogenic Rating

Soybean Peroxidase scores a 0/5 on the comedogenic scale, meaning that it is not likely to block pores or cause breakouts.

The reason for this low rating is its enzymatic nature, as enzymes in skincare are typically lightweight and absorb quickly without leaving residue that could clog pores.

Given this, Soybean Peroxidase is suitable for those prone to acne or breakouts, as it should not contribute to these issues.


The journey to clear, healthy skin often involves a fair amount of trial and error, coupled with a healthy dose of patience. Once you discover what works for you, consistency becomes critical to seeing and maintaining results.

Soybean Peroxidase is a noteworthy ingredient in this journey. Its impressive antioxidant capabilities and skin conditioning attributes make it a beneficial addition to cosmetic products, providing multiple benefits for various skin types.

Despite its benefits, Soybean Peroxidase is not as widely used or known as other antioxidants like Vitamin C or Retinol. However, its function is similar to other antioxidant and skin conditioning ingredients in its category. As more research sheds light on its properties, it could gain more popularity in the skincare industry.

As with most skincare ingredients, patience is essential when waiting for results with Soybean Peroxidase. It may take several weeks of consistent use before you start noticing skin texture and overall appearance improvements.

If you have concerns about introducing Soybean Peroxidase into your skincare regimen, remember that it’s generally well-tolerated with a low risk of side effects. Its plant-based nature and non-comedogenic rating make it a flexible ingredient suited to various skin types. However, as with any new ingredient, always listen to your skin and observe how it responds.

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