Description
The CSA Philosophy (Vitamin C + Sunscreen by day, Vitamin A by night) is globally recognised as one of the most effective approaches to long-term skin health and age prevention. This expertly curated routine features Crystal Retinal 6, making it the perfect entry-level CSA system for those new to vitamin A or seeking a well-tolerated introduction to advanced skin renewal.
What’s Inside the Routine:
C-Tetra® Advanced (Vitamin C Serum)
A powerful 20% vitamin C gel-serum designed to visibly brighten skin, improve tone and protect against environmental ageing. Helps boost radiance and support collagen for a firmer, more luminous complexion.
Advanced Day Ultimate Protect™ SPF 50+ | PA++++
A lightweight daily moisturiser offering very high UVA and UVB protection, enhanced with photolyase technology to support skin exposed to environmental aggressors. An essential step for preserving results and supporting long-term skin health.
Crystal Retinal® 6 (Night Serum)
A gentle yet effective retinaldehyde serum that works up to 11x faster than traditional retinol*. Supports overnight skin renewal, refines texture and softens the appearance of fine lines, making it ideal for beginners or sensitive skin types.
*Compared to retinol.
Why This CSA Routine Works:
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Brightens and improves overall skin tone
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Supports collagen and skin renewal overnight
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Helps refine texture and early signs of ageing
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Provides very high daily UV and environmental protection
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Designed for consistent, long-term skin health
How to Use:
Morning
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Cleanse
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Apply C-Tetra® Advanced
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Finish with Advanced Day Ultimate Protect™ SPF 50+
Evening
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Cleanse
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Apply Crystal Retinal® 6
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Follow with moisturiser
The Result:
Skin that looks brighter, smoother and more refined — protected by day and renewed by night.
