water-filters
20% Vitamin C + E Ferulic Acid Serum
This serum is the gold standard for value-driven high-potency antioxidants, utilizing the proven 'Duke Ratio' (L-Ascorbic Acid, Vitamin E, and Ferulic Acid) at a pH of 2.4-2.8 for maximum penetration. Unlike many competitors, Timeless manufactures in small batches and includes a 'manufactured on' date to ensure the notoriously unstable Vitamin C is fresh upon arrival.
Quality & Materials
Contains 20% L-Ascorbic Acid, the most biologically active form of Vitamin C. It is stabilized with 1% Vitamin E and 0.5% Ferulic Acid, which doubles the photo-protective effect of the Vitamin C.
Evidence & Testing
While the specific product hasn't undergone a 500-person RCT, it adheres strictly to the clinical parameters established by the Pinnell/Duke University research for cutaneous Vitamin C delivery.
Brand Transparency
Timeless is one of the few brands that explicitly states the pH level of the product (2.4-2.8) and provides a manufacturing date to guarantee potency.
Value Assessment
At roughly $0.90 per ml, it is the most cost-effective way to get high-concentration, stabilized L-Ascorbic Acid without fillers.
Why Not Alternatives?
Compared to the industry-leading Skinceuticals CE Ferulic ($182), Timeless offers the same active concentrations and pH range for less than 1/6th of the price. It outperforms budget brands like The Ordinary, which often use anhydrous (oil-like) bases that hinder absorption or lack the necessary Ferulic Acid to stabilize the L-Ascorbic Acid.
Sources & References
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