Tetrahexyldecyl Ascorbate

INCI NAME: Tetrahexyldecyl Ascorbate

Tetrahexyldecyl Ascorbate (THD ascorbate) is a highly stable, oil‑soluble vitamin C derivative used in premium serums and creams. Compared with pure L‑ascorbic acid, it’s generally easier to keep stable in formula and can be delivered in richer, lipid-based textures.

Within the skin, THD can be enzymatically converted toward active vitamin C, supporting the hallmark vitamin C outcomes: antioxidant defense, a brighter and more even-looking tone, and visible smoothing over time by supporting collagen-related pathways. Its lipid solubility is often highlighted for good affinity with the skin’s lipid matrix in well‑designed formulas.

Performance depends on concentration, supporting ingredients, and packaging. Many luxury formulas pair THD with other antioxidants and barrier-friendly emollients to boost radiance without a harsh feel. Daily broad‑spectrum SPF helps protect results and limit the return of discoloration.

Tetrahexyldecyl Ascorbate benefits:

  • Provides antioxidant support against daily environmental stressors
  • Helps brighten the look of dull skin and boost radiance
  • Supports a more even-looking tone and the appearance of dark spots
  • Supports firmer-looking skin by helping maintain healthy collagen pathways
  • Often offers a comfortable vitamin C experience in lipid-rich formulas

Tetrahexyldecyl Ascorbate is best for:

  • Dullness and lack of radiance
  • Uneven-looking tone and visible discoloration
  • Early signs of aging (fine lines, loss of firmness)
  • Normal to dry skin types or anyone who prefers richer textures
  • Those who find pure L-ascorbic acid too reactive or irritating

Aliased with:

  • Tetrahexyldecyl Ascorbate
  • THD Ascorbate
  • Ascorbyl Tetraisopalmitate
  • ATIP (Ascorbyl Tetraisopalmitate)

Cautions:

Vitamin C derivatives can still sting or irritate very sensitive skin—patch test and introduce gradually. If you’re using strong exfoliating acids or retinoids, consider alternating to reduce cumulative irritation. Daily broad‑spectrum SPF is strongly recommended to protect results and help prevent re‑darkening of discoloration.