Beauty · 2 audits
L-Ascorbic Acid — Verified Audits
SkinCeuticals C E Ferulic uses 15% L-ascorbic acid. Many budget alternatives use cheaper, less effective Vitamin C derivatives (ascorbyl glucoside, sodium ascorbyl phosphate). Always check the INCI list for 'ascorbic acid' specifically.
Audits using L-Ascorbic Acid
SkinCeuticals C E Ferulic vs Maelove vs Timeless: L-Ascorbic Acid Concentration Audit
SkinCeuticals C E Ferulic ($182) uses 15% L-Ascorbic Acid at pH 2.5–3.5 — the proven photoprotection concentration. Maelove and Timeless achieve the same formulation for $26.
The $80 Luxury Travel Kit vs The $15 Refillable Science Hack: INCI Stability Audit
Which actives survive TSA heat? L-Ascorbic Acid and Retinol fail above 25°C. Bifida Ferment and Matrixyl are stable to 40°C. The complete decanting guide with Muji container specs.
What is L-Ascorbic Acid?
The biologically active form of Vitamin C. The only form proven in peer-reviewed studies to stimulate collagen synthesis and inhibit melanin production when applied topically at concentrations of 10–20% and a pH below 3.5.
Full glossary definition →