Bacillus/Fig Fruit/Soybean Ferment Filtrate: What Is It, Cosmetic Uses, Benefits & Side Effects

Curious about this ingredient? In this article we're explaining exactly what it is and why it's used within cosmetic formulations.
Updated on: June 23, 2025
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All information on this page is verified using publicly available nomenclature standards and reference materials from The Personal Care Products Council (PCPC) and the European Commission's CosIng database. Our analyses are based on technical data from these sources to ensure accuracy and reliability.

What Is Bacillus/Fig Fruit/Soybean Ferment Filtrate?

Bacillus/Fig Fruit/Soybean Ferment Filtrate is the liquid filtrate that forms after soybeans and fig fruit are fermented with a friendly soil bacterium called Bacillus. During fermentation the microorganism breaks down the plant material into smaller molecules like peptides, amino acids and sugars that are easier for skin to absorb. The process also boosts the level of antioxidants that help protect the finished product from oxidation.

Fermented plant extracts have been part of traditional skincare in Asia for decades, but formulators began turning to this specific soy-fig blend in the last several years as consumers showed more interest in gentle natural actives. Manufacturers soak crushed soybeans and figs in water, add Bacillus cultures then let the mixture ferment under controlled warmth and airflow. After several days they filter out the solids, leaving a clear or slightly hazy liquid that goes into cosmetic formulas.

You will usually spot Bacillus/Fig Fruit/Soybean Ferment Filtrate in hydrating sheet masks, overnight creams, anti-aging serums, lightweight lotions and soothing after-sun gels. Brands use it when they want to add a plant-based active that offers moisture support and antioxidant care without a heavy feel.

Bacillus/Fig Fruit/Soybean Ferment Filtrate’s Cosmetic Benefits/Uses

This fermented blend brings multiple skin-friendly actions to a formula:

  • Antioxidant: The peptides and polyphenols created during fermentation help neutralize free radicals, which can lessen the look of dullness and support overall skin resilience.
  • Humectant: Natural sugars and amino acids attract water to the skin surface, giving an instant plumping effect and helping to keep moisture locked in over time.
  • Skin conditioning: The filtrate softens and smooths skin texture, making the complexion feel comfortable and look healthy while also improving the glide of the product during application.

Who Can Use Bacillus/Fig Fruit/Soybean Ferment Filtrate

This fermented filtrate is generally well tolerated by all major skin types, including dry, normal, combination, oily and even sensitive complexions because it is lightweight and water based with no added oils. Individuals with very reactive or highly allergy-prone skin should still read ingredient lists carefully since soy or fig proteins can trigger rare sensitivities.

The ingredient is plant derived and produced through bacterial fermentation, so it is considered suitable for both vegans and vegetarians. No animal by-products are introduced during processing.

Current research shows no hormone-like or systemic activity, so topical use while pregnant or breastfeeding is not expected to pose a risk. This is not medical advice and anyone who is pregnant or nursing should check with a healthcare professional before adding new skincare products just to be safe.

Bacillus/Fig Fruit/Soybean Ferment Filtrate does not make skin more reactive to sunlight and there is no evidence of photosensitivity. It layers well with most other actives, including retinoids and vitamin C, without stability issues.

Potential Side Effects/Adverse Reactions

Responses to any cosmetic ingredient vary from person to person. The points below list potential side effects that have been reported or are theoretically possible with Bacillus/Fig Fruit/Soybean Ferment Filtrate. They remain uncommon when the ingredient is used in professionally formulated products and most users experience none of them.

  • Allergic contact dermatitis in individuals sensitive to soy or fig proteins
  • Mild stinging or redness on very compromised or freshly exfoliated skin
  • Transient itching or tightness if applied to broken or sunburned skin
  • Rare hives or swelling linked to cross-reactivity with other plant allergies

If any of these reactions occur stop using the product immediately and consult a medical professional if symptoms persist or worsen.

Comedogenic Rating

Rating: 0/5

Bacillus/Fig Fruit/Soybean Ferment Filtrate is a water based extract with no added oils or heavy fatty acids so it does not occlude pores or encourage buildup of sebum and dead cells. Its key components are small peptides, amino acids and sugars that dissolve easily in water and rinse away cleanly. Because nothing in its composition is known to clog follicles the ingredient earns a solid non-comedogenic score.

This makes it a safe pick for people who are prone to acne or frequent breakouts. Formulas that pair the filtrate with richer oils or waxes could still cause congestion so always consider the full ingredient list.

Summary

Bacillus/Fig Fruit/Soybean Ferment Filtrate works as an antioxidant, humectant and general skin conditioner. Fermentation converts soy and fig nutrients into smaller molecules that soak in quickly, mop up free radicals and draw water to the skin surface for a soft supple feel. The ingredient is still a bit of a niche addition yet its gentle nature and plant origin are helping it show up in more hydrating masks, serums and light creams each year.

Overall safety is high with only rare allergy risks tied to soy or fig sensitivities. Most users can enjoy the benefits without issue but it is always smart to patch test a new product first to make sure your skin agrees.

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