Signal C™

Signal C™

Vitamin CE + Ferulic Antioxidant Serum

Intelligent antioxidant protection. Visible radiance. Healthier-looking skin.

Signal C™ is a clinically inspired antioxidant serum formulated with 15% Vitamin C, 1% Vitamin E, and 0.5% Ferulic Acid to help visibly brighten skin, improve the appearance of uneven tone, and defend against environmental stressors that contribute to premature aging.

This advanced formulation combines three proven antioxidants that work synergistically to enhance stability and effectiveness while helping support a brighter, more radiant complexion. With continued use, skin appears more luminous, refined, and resilient.

Designed for daily use, Signal C™ absorbs quickly and layers seamlessly into any skincare routine, delivering powerful antioxidant protection without heaviness or residue.

Key Benefits

• Helps brighten dull, tired-looking skin
• Improves the appearance of uneven skin tone
• Provides powerful antioxidant protection
• Helps reduce the visible effects of environmental stressors
• Supports a more radiant, youthful-looking complexion
• Lightweight, fast-absorbing formula suitable for most skin types

Key Ingredients

15% Vitamin C
A potent antioxidant that helps brighten skin, improve the appearance of discoloration, and promote a more even-looking complexion.

1% Vitamin E
Supports the skin barrier and works synergistically with Vitamin C to enhance antioxidant protection.

0.5% Ferulic Acid
Helps stabilize Vitamins C and E while amplifying their antioxidant benefits.

How To Use

Apply 3–5 drops to clean, dry skin each morning. Follow with moisturizer and SPF. For best results, use daily as part of your Upper Theory Skin regimen.