SIV Biome Balancing Serum 15 mL

A thoughtful introduction to microbiome-supportive skincare. SIV Biome Balancing Serum is a lightweight, spore-based facial serum designed to work with the skin’s natural biology. The 15 mL size provides an approximately 30-day supply and is an approachable way to experience SIV for the first time.

Why consider it

• Supports a balanced skin environment and comfortable-looking skin
• Helps maintain hydration and skin-barrier resilience
• Lightweight, non-comedogenic formula suitable for dry, normal, and oily skin types
• Designed with a proprietary blend of Bacillus spores and skin-compatible emollients

What is the skin microbiome?

The skin microbiome is the community of microorganisms that naturally lives on the skin’s surface. Like the physical barrier, this ecosystem plays a role in how skin responds to its environment. Microbiome-supportive skincare takes a cooperative approach—helping create conditions where skin can remain balanced rather than relying on an unnecessarily aggressive routine.

How SIV approaches microbiome-supportive skincare

SIV uses a proprietary blend of resilient Bacillus spores in a formula designed to support the skin’s unique surface ecosystem. The brand describes its approach through quorum sensing—the way microorganisms communicate within their environment. In practical terms, this serum is intended to support balance, hydration, and resilience while fitting comfortably into a professional skincare routine.

Who may appreciate it

This serum may appeal to anyone seeking a gentler, microbiome-conscious approach, especially those who prefer lightweight hydration or want to support skin that feels reactive, easily overwhelmed, or out of balance. SIV states that the formula is suitable for all skin types, including sensitive skin.

Texture and how to use

Shake vigorously before every application so the natural sediment disperses through the liquid. Apply 1–3 drops once daily after cleansing or toning. Pat into dry or damp skin, then follow with moisturizer. In the morning, finish with sunscreen.

Natural white or beige particles and settling are expected because the formula does not use fillers or suspension agents. The particles may remain visible after shaking and melt into the skin during application.

Key formula

• Squalane: A sugarcane-derived biomimetic oil that supports hydration.
• Caprylic/Capric Triglyceride: Helps replenish the skin’s surface and resist moisture loss.
• Glyceryl Caprylate: A plant-derived emollient that supports skin moisture.
• Bacillus: SIV’s proprietary blend of Bacillus spores, formulated to support a balanced skin microbiome.

Beauty Network professional perspective

Microbiome-supportive skincare fits Beauty Network’s belief in working with the skin instead of overwhelming it. SIV offers a thoughtful option for building a routine around balance, barrier comfort, and resilience rather than unnecessary intensity.

Frequently asked questions

Where does it fit in my routine?
Use it after cleansing or toning and before moisturizer. Follow with sunscreen during the day.

Is visible sediment normal?
Yes. Natural settling and visible particles are expected. Shake vigorously before each use.

Why choose the 15 mL size?
SIV identifies 15 mL as an approximately 30-day supply, making it well suited to first-time users.

Can sensitive skin use it?
SIV states that it is safe for sensitive skin. If your skin is highly sensitive, patch test first. Avoid the eye area, discontinue use if irritation occurs, and do not use if you are allergic to any ingredient.

Build a supportive routine

Pair with a gentle cleanser, a comfortable moisturizer, and daily sunscreen. Introduce new products thoughtfully so you can observe how your skin responds.

Size: 15 mL / 0.5 fl oz