Anti-wrinkle Anti-aging Antioxidant

Tetrahexyldecyl Ascorbate

THDA 1

Delivers the benefits of vitamin C in a more stable, oil-soluble form that absorbs into the skin more effectively. It helps brighten skin tone, support collagen production, and protect against UV and environmental damage. 1,2

EFFECTIVE CONCENTRATION 7-30% 3

TIME TO RESULTS 8-12 weeks 1,4

CATEGORY Antioxidant 1,2

STABILITY

More stable than pure vitamin C · Avoid light and heat 2

HOW IT WORKS

Unlike regular vitamin C which is water-soluble and breaks down quickly, this form is oil-soluble, so it blends with your skin's natural oils and absorbs deeper into the skin layers. Once there, enzymes break it down to release active vitamin C, which slows pigment production, neutralizes free radicals, and supports collagen to maintain firmness. 2

KEY BENEFITS

Brightens Skin and Fades Dark Spots: Helps reduce pigmentation and even out skin tone by slowing the enzyme that triggers melanin production. 1,5
Supports Collagen and Fights Wrinkles: Promotes collagen production and helps block the enzymes that break collagen down, supporting firmer, smoother skin over time. 2
Absorbs Deeper Than Standard Vitamin C: The oil-soluble structure penetrates the skin more effectively than water-soluble vitamin C, reaching deeper layers. 2,6
Powerful Antioxidant Protection: Neutralizes free radicals caused by UV exposure and environmental stress, helping prevent premature aging. 1,2,6

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INTERACTION WARNINGS

Generally well tolerated and non-irritating at typical cosmetic use levels. As a general reminder, avoid combining Cellexia products with retinol products. A patch test is recommended before first use. 1,3

Improves Photoaging and Evens Skin Tone: A 12-week study on 35 adults found that a serum containing tetrahexyldecyl ascorbate significantly decreased skin pigmentation and fine lines, while increasing smoothness, firmness, and elasticity. 1
Boosts Collagen and Blocks Collagen-Destroying Enzymes: Lab testing on human skin cells showed tetrahexyldecyl ascorbate increased collagen production and suppressed the enzymes that break collagen down. 2
Helps Lighten Facial Melasma: A clinical study found that a skincare regimen including tetrahexyldecyl ascorbate effectively lightened facial melasma during summer months, when pigmentation typically worsens. 5
Penetrates Through the Skin Barrier: A lab study on human skin samples showed that a formula containing tetrahexyldecyl ascorbate penetrated through the outer skin layer and helped calm UV-triggered inflammation from within. 9

THDA Performs Better With a Stabilizing Antioxidant Partner: A clinical study on 44 adults found that tetrahexyldecyl ascorbate combined with a stabilizing antioxidant improved wrinkles, pigmentation, and redness more than tetrahexyldecyl ascorbate on its own over 8 weeks. 4
Topical Vitamin C With Tetrahexyldecyl Ascorbate Improves Wrinkling and Collagen: A 12-week half-face study on 10 patients found that a formula containing 7% tetrahexyldecyl ascorbate visibly improved wrinkling, with skin biopsies confirming new collagen formation on the treated side. 10
THDA Penetrates Skin More Effectively Than Other Vitamin C Forms: A study comparing different forms of vitamin C found that THD ascorbate penetrated skin more effectively than other commonly used derivatives. 11

Tetrahexyldecyl Ascorbate

HOW IT WORKS

KEY BENEFITS

INTERACTION WARNINGS

REFERENCES

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