Your Color Up ritual

DEFY C+ Serum | 4oz Backbar

View price and purchase options
  • Color Up DEFY C+ Serum in 4 oz professional backbar size for brightening facial treatments and esthetician protocols on white background.
  • Color Up DEFY C+ Serum in 4 oz professional backbar size for brightening facial treatments and esthetician protocols on transparent background.
1 2

DEFY C+ Serum | 4oz Backbar

DEFY C+ Serum | 4oz Backbar

Your Color Up ritual

DEFY C+ delivers the same dual-source stabilized Vitamin C system — Tetrahexyldecyl Ascorbate (oil-soluble) + Sodium Ascorbyl Phosphate (water-soluble) + Ferulic Acid stabilizer — in a professional 4oz backbar size...

See full details, directions, and ingredients

Low stock: 1 left

Pro Partner Login to Gain Access

Professional access

Sign in to view professional pricing.

Existing B2B and Faire customers can sign in with their approved account. New professional partners can apply for access.

Sign in Apply for professional access

Wholesale Customer Access Required

This content is available to approved B2B customers only.

Log in to access wholesale

View full details

Product knowledge

Everything you need for a confident ritual.

Review what it is, how to use it, ingredient information, and available product records in one place.

Product line
  • PRO
Suitable for
  • All skin types
Product form
  • Serum
Per-treatment amount
0.1 oz

Product overview

DEFY C+ delivers the same dual-source stabilized Vitamin C system — Tetrahexyldecyl Ascorbate (oil-soluble) + Sodium Ascorbyl Phosphate (water-soluble) + Ferulic Acid stabilizer — in a professional 4oz backbar size with 400mg Pure CBD, Defy is designed for high-frequency facial treatment use. The same formula your clients will take home in the 1oz retail size, at the volume your treatment room demands. The Dual-Source Vitamin C System includes:

Tetrahexyldecyl Ascorbate (THA) — oil-soluble Vitamin C. Penetrates the lipid layer of the skin barrier directly, reaching deeper dermal layers where collagen synthesis and melanin regulation occur. More stable than L-Ascorbic Acid. Does not require low pH to be effective.

Sodium Ascorbyl Phosphate (SAP) — water-soluble Vitamin C. Converts to active ascorbic acid on the skin surface. Documented brightening, antioxidant, and mild antimicrobial activity. Stable at physiological pH.

Ferulic Acid — stabilizes both THA and SAP, prevents oxidative degradation, and amplifies combined antioxidant efficacy. The clinical standard for Vitamin C serum stabilization.

Together: comprehensive brightening, antioxidant defense, and collagen support across both phases of the skin barrier.

Rooted in Science. Created with Intention. Made with Love.

Full ingredient deck

Distilled Water, Tetrahexyldecyl Ascorbate, Sodium Ascorbyl Phosphate, Organic Squalane, Organic Grapeseed Oil, 1,3 Propane Diol, Glyceryl Oleate Citrate, Caprylic/Capric Triglyceride, Cetearyl Olivate, Sorbitan Olivate, Organic Vitamin E Oil, Organic Hemp Seed Oil, Heptyl Undecylenate, Organic Vegetable Glycerin, Glyceryl Stearate, Cetearyl Alcohol, Ferulic Acid, Cannabidiol (from Organic Hemp), Citric Acid, Sodium Gluconate, Xanthan Gum, Organic Lemongrass Essential Oil, Benzyl Alcohol, Salicylic Acid, Sorbic Acid.

CBD: Organic Hemp-Derived | Total THC: ≤0mg | Size: 4oz / 118mL

Ingredient breakdown

Cannabidiol (CBD) — Organic Hemp-Derived | THC ≤0mg
CBD modulates CB2 receptor activity in the skin's immune cells, reducing inflammatory cytokine signaling. Addresses the root cause of post-inflammatory hyperpigmentation (PIH) — the inflammatory cascade that triggers excess melanin production after acne, procedures, or environmental stress. Particularly valuable in a professional brightening protocol where post-procedure inflammation is a primary concern. Non-intoxicating. Non-detectable THC on every batch COA.

Organic Squalane
Stable, plant-derived analog of the skin's own squalene. Lightweight, non-comedogenic lipid-phase hydration and primary delivery vehicle for Tetrahexyldecyl Ascorbate. Appropriate for all skin types including oily and acne-prone.

Organic Grapeseed Oil (Vitis vinifera)
Rich in linoleic acid and oligomeric proanthocyanidins (OPCs). Lightweight, rapidly absorbing, non-comedogenic. Complements the Vitamin C antioxidant system with additional photoprotective antioxidant activity.

Organic Hemp Seed Oil
Omega-rich, ceramide-supportive, non-comedogenic. Supports barrier function and moisture retention. Contains no cannabinoids — distinct from CBD.

Organic Vitamin E Oil (Tocopherol)
Works synergistically with Vitamin C and Ferulic Acid. The classic Vitamin C + E + Ferulic Acid combination is one of the most well-documented antioxidant protocols in clinical skincare.

Cetearyl Olivate + Sorbitan Olivate — Lamellar Emulsion System
Olive-derived emulsifiers enhancing active ingredient absorption and delivering the lightweight, non-greasy texture appropriate for a morning brightening serum.

How to use

Apply 1–2 pumps in the morning, dotting her over your face and neck. Blend in an upward, sweeping motion—looking toward the sun—and always follow with protection to maintain your radiant defiance.

Product records

Open the current certificate attached to this product and the available Color Up product one-page.

Testing record

Certificate of Analysis

Review the certificate currently attached to this product record below, or open the full PDF in a new tab.

View COA PDF

Product one-page

DEFY C+ Serum One Sheet

Open the product overview and professional reference sheet.

DEFY C+ Serum One Sheet cover
View One-Page

Build the rest of your ritual.

Skincare and Wellness Education

View all
  • Is Foam Really Bad for the Skin Barrier?

    Is Foam Really Bad for the Skin Barrier?

    Is the trending claim that all foaming cleansers destroy the skin barrier scientifically accurate? Shauna and Amber, Color Up Educators, break down advanced surfactant physics, formulation chemistry, and the treatment-room...

    Is Foam Really Bad for the Skin Barrier?

    Is the trending claim that all foaming cleansers destroy the skin barrier scientifically accurate? Shauna and Amber, Color Up Educators, break down advanced surfactant physics, formulation chemistry, and the treatment-room...

  • Technical Clinical Analysis of REMEDY Treatment Oil (Liquid Gold)

    Technical Clinical Analysis of REMEDY Treatment...

    The evolution of cannabinoid-based topical applications has transitioned from an era of anecdotal wellness trends to a rigorous, science-led dermatological discipline. At the center of this professional shift is the...

    Technical Clinical Analysis of REMEDY Treatment...

    The evolution of cannabinoid-based topical applications has transitioned from an era of anecdotal wellness trends to a rigorous, science-led dermatological discipline. At the center of this professional shift is the...

  • Color Up professional CBD skincare products on a retail shelf

    How to Use Your Resale Certificate with Color U...

    Your resale certificate is one of the most powerful tools in your professional toolkit. Used correctly, it puts real money back in your pocket on every wholesale order. Learn exactly...

    How to Use Your Resale Certificate with Color U...

    Your resale certificate is one of the most powerful tools in your professional toolkit. Used correctly, it puts real money back in your pocket on every wholesale order. Learn exactly...

1 3
View all