Serum Twenty: The 20% Vitamin C Serum for Serious …

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Serum Twenty delivers 20% pure L-ascorbic acid with no alcohol — Phyto-C's highest-concentration vitamin C serum for brightening, collagen, and UV defense.

Source: https://www.phyto-c.com/blogs/news/serum-twenty-20-percent-vitamin-c-serum?srsltid=AfmBOoodSVunsflp7W21Th0xxMSxTDN28cU2E3yra_QQiKXfwdzW8KGk