The Gold Standard Vitamin C: 10% BV-OSC Tetrahexyldecyl Ascorbate + Squalane Oil Serum


A unique 10% Vitamin C serum for firmer, more even, brighter looking skin. Supports natural collagen and improves look of discoloration, lines, and wrinkles. AND delivers a radiant dewy glow.

A concentrated powerhouse featuring the “Gold Standard” in Vitamin C (10% Tetrahexyldecyl Ascorbate aka BV-OSC or THD) -- delivered in luxurious nourishing lipids from Squalane, Rosehip, Watermelon and Jojoba oils that both help enhance Vitamin C penetration, lock in moisture, and give a lovely glowy look. Skin feels soft and supple.

Antioxidant protection to fight free radicals and environmental stressors. Helps lock in moisture and support skin barrier for more moisturized skin.

Tetrahexyldecyl Ascorbate can penetrate deeper into the skin than other forms of Vitamin C. Paired with Squalane to further enhance penetration. Squalane also leaves skin feeling silky and improves look of elasticity.

Tetrahexyldecyl Ascorbate (THD) is non-exfoliating and less potentially irritating than other forms of Vitamin C, making it a great choice for sensitive skin. THD is highly stable.

Light feel. Use as a serum or face oil, depending on routine / preference.


10% Tetrahexyldecyl Ascorbate (Vitamin C) – considered the “gold standard” in Vitamin C.

  • Highly stable and oil (lipid) soluble, Tetrahexyldecyl Ascorbate (THD) may penetrate better into skin than other forms of vitamin C.

  • Helps brighten, address dullness, and improve the overall appearance of skin.

  • Support natural collagen, improve the appearance of fine lines, and firmer looking skin.

  • Antioxidant - helps protect skin lipids and ceramides and defend from environmental aggressors.

  • THD is non-exfoliating and less potentially irritating than other forms of vitamin C. Delivered in nourishing oils, makes it a lovely choice for sensitive skin.

  • Increased from 3% to 10% in the Dec '22 Version

Squalane – promotes soft, silky, supple, healthier looking skin and reduces the appearance of lines and wrinkles. Improves look of elasticity. Emollient. Non-comodogenic.

  • Source of lipids that help keep skin hydrated by strengthening the skin barrier to reduce and protect against moisture loss (TEWL).

  • Calms and may reduce the look of redness.

  • Antioxidant: helps protect skin from free radical damage.  

Rosehip Oil – Nourishing source of fatty acids, omega-3 and omega-6, antioxidant vitamin E. Softens and supports the skin barrier. Promotes healthy looking skin.

Watermelon Oil – helps skin retain moisture and reduces TEWL (transepidermal water loss). Source of antioxidant vitamin E.

Jojoba Oil – helps lock in moisture for soft supple skin.


Directions: Apply to cleansed skin.

Tips: Apply thinner serums first. This product can be use as a serum, face oil, or booster (mix a couple drops with your favorite serum, moisturizer or oil).

Scent: None / faintest white tea scent

Feel: Light, goes on easily.

Skin types: All skin types.

Time of day: Anytime (AM/PM/Both). Vitamin C is an AM favorite that pairs well with sunscreen.


Simmondsia Chinensis (Jojoba) Oil, Squalane, Rosa Canina (Rosehip) Oil, Citrullus Lanatus (Wild Watermelon) Seed Oil, Tetrahexyldecyl Ascorbate (Vitamin C), Tocopheryl Acetate, Fragrance*

*Less than 0.2% White Tea Fragrance


Vegan. Cruelty Free. Clinical. Clean*

Formulated without parabens, phthalates, sulfates, PEGs, mineral oils, drying alcohols, formaldehyde, artificial colors or dyes, silicones, and more. We aim for an EWG score of 1.

*Our definition of "Clean" use the Credo standard.

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