Tetrahexyldecyl Ascorbate - THD VITAMIN C - THE OIL-SOLUBLE POWERHOUSE
Your gentle yet potent Vitamin C for bright, firm, and radiant skin
Vitamin C is celebrated in skincare for its ability to brighten, protect, and rejuvenate. But as we’ve seen with traditional L-ascorbic acid, not all forms are created equal. Enter Tetrahexyldecyl Ascorbate (THD) — a stable, oil-soluble form of Vitamin C that combines the brightening and collagen-supporting power of Vitamin C with deep skin penetration and gentle tolerance.
What makes THD Vitamin C special?
Unlike water-soluble Vitamin C derivatives like Sodium Ascorbyl Phosphate (SAP), THD is oil-soluble, meaning it integrates perfectly into your serums, oils, and creams. Its lipid-loving nature allows it to:
Penetrate the skin more deeply
Deliver Vitamin C where it can support collagen production efficiently
Provide antioxidant protection in the lipid-rich layers of skin
Stay stable in formulations without oxidising quickly
For the Goddess Nectar — your oil-based serum — THD is an essential brightening backbone, working alongside Bakuchiol, Marula, Rosehip, and Jojoba oils to create radiant, smooth, resilient skin.
Key benefits of THD Vitamin C
1. Brightens skin tone
THD helps reduce pigmentation, dark spots, and dullness. Its oil-soluble nature allows it to reach deeper skin layers, providing longer-lasting and more noticeable radiance compared to some water-soluble Vitamin Cs.
2. Supports collagen and elasticity
Vitamin C is crucial for collagen synthesis, and THD delivers this effect gently but effectively. With consistent use, skin appears firmer, plumper, and more youthful.
3. Powerful antioxidant protection
THD neutralises free radicals caused by UV exposure, pollution, and stress. By acting within lipid-rich skin layers, it protects against oxidative stress where many traditional Vitamin Cs cannot reach.
4. Gentle on sensitive skin
While L-ascorbic acid can irritate, sting, or destabilise sensitive formulations, THD is low-irritation and highly stable, making it suitable for mature, sensitive, and reactive skin types.
Tetrahexyldecyl Ascorbate [THD] in the Goddess Nectar
In your Goddess Nectar, THD Vitamin C works synergistically with:
Bakuchiol — a gentle retinol alternative for skin renewal
Marula, Rosehip, and Jojoba oils — for nourishment, barrier support, and hydration
Rose Absolute and Frankincense — for antioxidant and sensory benefits
Together, these ingredients form a luxurious, multi-layered serum that brightens, smooths, firms, and protects. Each drop delivers Vitamin C without irritation, ensuring a luminous, balanced complexion while supporting skin health from the inside out.
Why I chose THD for Solstice Skin Food
At Solstice Skin Food, every ingredient must meet three criteria:
Efficacy — Does it deliver real results?
Gentleness — Is it compatible with sensitive or reactive skin?
Stability — Will it maintain potency in natural formulations?
THD meets all three. It’s the perfect complement to the water-soluble SAP in the Goddess Elixir, offering oil-soluble Vitamin C benefits in your Nectar serum. Together, these forms ensure your skin receives consistent, layered antioxidant protection and brightening.
Bottom line
THD Vitamin C is stable, deep-penetrating, oil-soluble, and gentle. It:
Brightens dull or uneven skin
Supports collagen and elasticity
Protects against free radicals
Integrates seamlessly into oil-based formulations
Complements other skin-loving actives
In the Goddess Nectar, THD works quietly but powerfully, giving skin radiance, resilience, and a soft, healthy glow — day after day, without compromise.
frequently asked questions
Q: What is THD?
A: THD is an oil-soluble form of Vitamin C that penetrates deep into the skin to support collagen production, brighten skin tone, and protect against free radical damage.
Q: How is THD different from other Vitamin C forms?
A: Unlike water-soluble Vitamin C (like L-Ascorbic Acid), THD is oil-soluble, more stable, and gentler on sensitive skin while still providing anti-aging and brightening benefits.
Q: Can THD help with hyperpigmentation?
A: Yes, THD can help even out skin tone and fade dark spots over time by supporting healthy collagen synthesis and reducing oxidative stress.
Q: Is THD suitable for sensitive skin?
A: Yes, it’s one of the gentlest forms of Vitamin C and rarely causes irritation.
Q: How should THD be used in skincare?
A: It works best in oil-based serums, creams, or elixirs. Apply after cleansing and before heavier oils or creams.
