10% Tetrahexyldecyl Ascorbate

Elevate your glow with our potent vitamin C oil serum featuring 10% Tetrahexyldecyl ascorbate - a stable, deeply penetrating form of vitamin C - blended with organic rosehip oil, marula oil, and jojoba oil. This lightweight, non-greasy formula brightens dull skin, fades dark spots and hyperpigmentation, boosts collagen for firmer texture, and delivers intense hydration while protecting against free radicals and environmental damage. Ideal for all skin types, including dry, mature, or sensitive, seeking visible radiance without the instability or irritation of traditional ascorbic acid.

Key Benefits:

Powerful Brightening: 10% THD ascorbate fades spots, evens tone, and reveals luminosity.

Anti-Aging & Firming: Stimulates collagen, smooths fine lines, and improves elasticity.

Deep Nourishment: Rosehip, marula, and jojoba oils hydrate, repair barrier, and calm inflammation.

Tired of dull, uneven skin or stubborn dark spots? Our premium vitamin C brightening serum harnesses 10% tetrahexyldecyl ascorbate (THD ascorbate) - one of the most stable and bioavailable forms of vitamin C - fused with antioxidant-rich rosehip oil, luxurious marula oil, and balancing jojoba oil. This clean, oil-based powerhouse delivers superior brightening, collagen support, and deep hydration in a gentle, non-irritating formula that's suitable for daily use, even on sensitive skin.

Why 10% Tetrahexyldecyl Ascorbate Stands Out as Premium Vitamin C

Unlike unstable L-ascorbic acid, tetrahexyldecyl ascorbate is oil-soluble, allowing it to penetrate deeper into the skin layers for enhanced efficacy. At a potent 10% concentration - a clinically inspired level often recommended for visible brightening and anti-aging results - THD ascorbate neutralizes free radicals, inhibits melanin production to fade hyperpigmentation and dark spots, stimulates collagen synthesis to reduce fine lines and improve firmness, and provides robust antioxidant defense against UV and pollution damage. Research highlights its ability to brighten tone, support elasticity, and reduce signs of photoaging with minimal irritation, making it ideal for those seeking effective vitamin C without stinging or oxidation issues.

Rosehip Oil: Nature's Vitamin-Packed Glow Booster

Cold-pressed rosehip oil is loaded with vitamins A, C, and E, plus essential fatty acids (linoleic and linolenic) that promote skin renewal. It brightens complexion, fades acne scars and hyperpigmentation, smooths fine lines, calms inflammation, and deeply nourishes dry or mature skin. Its natural trans-retinoic acid content gently exfoliates and regenerates, enhancing the brightening effects of THD ascorbate for a more even, radiant tone.

Marula Oil: Lightweight Luxury for Hydration & Protection

Sourced from the marula fruit, this fast-absorbing oil is exceptionally rich in oleic and linoleic acids, antioxidants, and amino acids. It hydrates without greasiness, softens fine lines, strengthens the skin barrier, and soothes redness or irritation. Marula oil's high antioxidant profile complements vitamin C by shielding against environmental stressors, while its emollient properties lock in moisture for plump, supple skin - perfect for dry, dehydrated, or aging complexions.

Jojoba Oil: The Ultimate Balancer & Barrier Supporter

Jojoba oil's structure closely mimics skin's natural sebum (wax esters), making it non-comedogenic and ideal for all skin types. It regulates oil production, prevents breakouts, reduces inflammation, and delivers lightweight yet long-lasting hydration. Rich in vitamin E and antioxidants, it calms sensitive skin, supports healing, and enhances the absorption of active ingredients like tetrahexyldecyl ascorbate for maximum benefits.

Synergistic Power: Why This Blend Delivers Exceptional Results

Brightening & Even Tone - THD ascorbate + rosehip target melanin for faded spots and luminous glow.

Anti-Aging & Firmness - Collagen boost from vitamin C, combined with nourishing oils to smooth wrinkles and improve elasticity.

Hydration & Barrier Repair - Marula and jojoba deeply moisturize and protect, countering any potential dryness from actives.

Gentle & Stable - Oil-soluble format ensures stability, deep penetration, and low irritation - use AM/PM without photosensitivity concerns.

Users often see brighter, more even skin in 4-8 weeks, with continued improvements in texture, firmness, and radiance over time.

How to use:

After cleansing and applying a treatment tonic, apply 3-5 drops to face and neck. Gently massage in; it absorbs quickly with a silky finish. Layer under moisturiser or SPF (essential daytime for vitamin C efficacy). Suitable for morning and evening routines. Patch test first, especially if new to high-potency vitamin C.

Who Is This Serum For?

Dull, uneven, or sun-damaged skin needing brightening

Mature skin targeting fine lines, loss of firmness, and hydration

Dry or dehydrated types craving nutrient-rich oils

Sensitive skin seeking stable, non-irritating vitamin C

Clean beauty lovers wanting plant-powered, antioxidant-rich care

Fundamentals Skincare is

Vegan friendly
Cruelty-free
Cosmeceutical grade
Fragrance-free
Made in South Africa
What's in the box
1 x Fundamentals 30ml Glass Amber Dropper Bottle