Most Vitamin C Serums Are Unstable. Here's What Works

Vitamin C serums are everywhere. Most of them don't work.

The Problem With Most Vitamin C Formulations

• L-ascorbic acid oxidizes fast. The most common form degrades when exposed to light, air, and heat. That $80 serum turns orange in 6 weeks and stops working.

• It's often irritating. High concentrations (15-20%) of L-ascorbic acid sting, burn, and cause redness—especially on sensitive or mature skin.

• It requires low pH. L-ascorbic acid works at pH 3.5 or lower. That's acidic enough to disrupt your barrier if formulated incorrectly.

• Packaging is rarely adequate. Unless it's in an airless, opaque pump, it's oxidizing from the day you open it.

What Actually Works

Stable vitamin C derivatives. Not all vitamin C is created equal.

3-O-Ethyl Ascorbic Acid is one of the most stable and effective forms of vitamin C. It's oil-soluble, penetrates deeper than L-ascorbic acid, works at skin-friendly pH levels, and doesn't oxidize easily. It delivers brightening, collagen support, and antioxidant protection without the irritation or instability.

Our Serum uses 3-O-Ethyl Ascorbic Acid alongside bakuchiol, ectoine, niacinamide, and peptides. You get real vitamin C benefits—brightening, barrier support, anti-aging—without oxidation, stinging, or wasted money.

If your current vitamin C serum is brown, sticky, or makes your face burn, it's not working. You need stable actives in formulations designed for real skin, not marketing claims.