Streptococcus thermophilus ferment has emerged as a noteworthy ingredient in skincare. Derived from specific bacterial processes, it supports skin health. It’s a postbiotic ingredient, delivering beneficial compounds to the skin. This article explores its nature, skin effects, and mechanisms of action.
Understanding Streptococcus thermophilus Ferment
Streptococcus thermophilus is a bacterium commonly found in fermented foods, particularly dairy products like yogurt. In skincare, it’s a “ferment” or “ferment filtrate,” often called a postbiotic or lysate, not live bacteria. Bacteria are cultivated under controlled conditions, and beneficial compounds produced during growth and fermentation are isolated for cosmetic use. These isolated compounds, byproducts of bacterial metabolism, are integrated into skincare formulations.
The process involves cultivating Streptococcus thermophilus and processing the culture to obtain a filtrate or lysate. This yields a rich mixture of substances like enzymes, peptides, and other metabolites. Applying these fermented ingredients provides bacterial benefits without live microorganisms. This approach ensures stability and broad applicability in skincare products.
Key Skin Benefits
Skincare products with Streptococcus thermophilus ferment offer several skin improvements. A primary benefit is enhanced skin hydration, helping the skin retain moisture and appear plumper. It also strengthens the skin’s natural barrier, essential for protecting the skin from environmental stressors and preventing water loss.
Beyond hydration and barrier support, it helps soothe irritated or reddened skin. It exhibits anti-inflammatory properties, reducing discomfort and sensitivity. Regular application improves overall skin texture, promoting a smoother, more resilient complexion. This ingredient particularly benefits sensitive and dry skin types, promoting renewal and reducing inflammation.
Mechanisms of Action
The benefits of Streptococcus thermophilus ferment in skincare are rooted in its intricate mechanisms of action, primarily through the compounds it produces during fermentation. One significant mechanism involves increasing the skin’s production of ceramides, which are lipids essential for maintaining the skin barrier and moisture. Studies have shown that topical application of creams containing Streptococcus thermophilus lysate can lead to a notable increase in ceramide levels in the stratum corneum, the outermost layer of the skin. This increase in ceramides helps to reduce transepidermal water loss, contributing to better hydration and barrier integrity.
Streptococcus thermophilus ferment can contribute to the balance of the skin’s natural microbiome. A healthy skin microbiome is essential for optimal skin function and defense against external aggressors. The ferment also provides beneficial components like lactic acid and amino acids, which are known to contribute to skin hydration and overall conditioning. Some strains of Streptococcus thermophilus have been shown to produce hyaluronic acid, a powerful humectant that attracts and holds water in the skin, further boosting moisturizing effects. Its components can also aid in reducing redness and inflammation by influencing cellular pathways.
Using Skincare with Streptococcus thermophilus Ferment
Streptococcus thermophilus ferment is increasingly found in a variety of skincare formulations, allowing for flexible integration into a daily routine. Common product types include hydrating serums, moisturizers, and masks, designed to deliver its beneficial compounds efficiently. These products can typically be used during both morning and evening skincare routines.
To incorporate these products, they are often applied after cleansing and toning, and before heavier creams or oils. For instance, a serum containing Streptococcus thermophilus ferment might be applied directly to the skin, followed by a moisturizer to seal in the hydration. As with any new skincare product, it is advisable to perform a patch test before full application. This simple step involves applying a small amount of the product to an inconspicuous area of skin, such as the inner arm or behind the ear, and observing for any adverse reactions over 24 to 48 hours. Generally, Streptococcus thermophilus ferment is considered well-tolerated, making it suitable for many skin types, including sensitive skin.