Sodium Citrate

SODIUM CITRATE

Origin & Source
Sodium Citrate is the sodium salt of citric acid, a naturally occurring organic acid found abundantly in citrus fruits such as lemons, limes, and oranges. Cosmetic-grade Sodium Citrate is produced by neutralizing citric acid—typically derived through the fermentation of plant-based sugars—with sodium. This creates a highly stable, water-soluble compound that mirrors naturally occurring biochemical processes. Though refined for consistency, it remains naturally derived and widely accepted in food, pharmaceutical, and cosmetic applications.

Biochemical Profile & Relationship to Skin Chemistry
Sodium Citrate plays an essential role in pH regulation, closely interacting with the skin’s natural acid mantle. Healthy skin maintains a slightly acidic pH, which supports barrier function, enzyme activity, and microbial balance. Sodium citrate helps formulations remain within this optimal pH range, ensuring that both active ingredients and preservatives function correctly while remaining gentle to the skin.

Skin Function & Benefits
On the skin, Sodium Citrate does not act as an exfoliant or treatment active; instead, it supports skin tolerance and comfort by preventing products from becoming too acidic or alkaline. This indirectly protects the skin barrier, reduces irritation risk, and helps maintain hydration and resilience. Because it mirrors compounds naturally found in the body’s metabolic cycles, it is exceptionally well tolerated—even by sensitive or compromised skin.

Formulation Role & Performance Benefits
In formulation, Sodium Citrate functions primarily as a buffering agent. It stabilizes pH over time, preventing fluctuations that could degrade actives, weaken preservative systems, or irritate the skin. It works synergistically with ingredients such as GDL, lactic acid, sodium benzoate, and potassium sorbate, enhancing overall formula stability, safety, and shelf life. Its gentle buffering action allows formulators to fine-tune performance without harsh adjustments.

Typical Uses in Skincare & Body Care
Sodium Citrate is commonly used in creams, lotions, serums, mists, toners, cleansers, sprays, and naturally preserved formulations. It is especially important in water-based products and systems containing organic acids or fermentation-derived ingredients.

Why Unicorn Tears Uses It
Unicorn Tears uses Sodium Citrate as a precision-balancing ingredient—quiet, supportive, and essential. It ensures formulas remain skin-friendly, stable, and effective throughout their lifecycle. Its fermentation-aligned origin, excellent safety profile, and role in protecting both skin and formulation integrity reflect the brand’s philosophy that true luxury lies in balance, intention, and intelligent formulation.