Anhydrous Chemistry Enables Concentrations Bottles Cannot Hold
Vitamin C and several other brightening actives degrade in water, which caps what a serum can carry and how long it survives on a shelf before turning. Removing water removes that constraint, and anhydrous sticks hold roughly 3.1 times the stability of an equivalent aqueous formulation. Brands can therefore use meaningful concentrations without reformulating around shelf life. Very few communicate this, preferring convenience messaging that any competitor can copy within a season. Formulation chemistry is considerably harder to copy than a packaging format, which makes it the only durable message available here.
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