Sérum à la vitamine C

Apply 1–2 pumps to clean, dry skin after cleansing and toning. Vitamin C serum can be layered before or after other Counter serums. Follow with moisturizer. Use every morning, and always finish with sunscreen during the day.

This formula is designed to deliver immediate radiance*, with visible improvements in brightness, smoothness, the appearance of dark spots, and overall skin vitality within 4-8 weeks with consistent use**

*Based on a 33-subject clinical study after eight weeks. 
**Based on a 33-subject consumer perception study after eight weeks of use

Yes. This vitamin C serum helps visibly boost radiance and reduce the appearance of dark spots, leaving skin looking brighter, luminous, and revitalized over time. In clinical testing with consistent use over 8 weeks, study participants saw a decrease in the appearance of dark spots. 97% of participants said skin looks less dull, firmer and 94% said skin looks more luminous.

This formula is designed with two ultra-stable forms of vitamin C to help deliver visible results without the irritation** often associated with traditional vitamin C serums. As with any product, we recommend patch testing if you have sensitive skin.

**Based on a 33-subject clinical study after eight weeks, a 33-subject consumer perception study after eight weeks of use, and a 105-subject Repeated Insult Patch Test (RIPT)

This serum is formulated with ultra-stable forms of vitamin C and designed to maintain efficacy and performance over time. For best results, store out of direct sunlight.

Allow the serum to fully absorb into the skin, typically about 1–2 minutes, before applying moisturizer.

Yes. Vitamin C and retinol or retinol alternatives can be used in the same routine. Retinoic acid and retinyl palmitate—derivatives of retinol (vitamin A)—are included on The Never List®. When applied to the skin in the presence of sunlight, these ingredients may increase skin’s vulnerability to UV damage. Read more about these ingredients and The Never List® here. If you choose to use vitamin C and a retinol product together, introduce them gradually and monitor how your skin responds. We recommend pairing All Bright Vitamin C Serum with Countertime Retinatural™ + Advanced Super Serum, a powerful age-defying serum that delivers retinol-like results without the irritation typically associated with traditional retinol. These serums are designed to work together to help boost your routine.

Yes. Apply All Bright Vitamin C Serum after cleansing and before heavier serums or moisturizers. It layers well within a routine and can be used alongside hydrating or treatment serums like Counterglow Tri-luronic Hydrating Serum and Countertime Retinatural™ + Advanced Super Serum. They were designed to work together and can be layered in any order. For non-Counter products, a good rule of thumb is to layer products from thinnest to thickest in your skin care routine.

This formula uses two ultra-stable forms of vitamin C—one oil-soluble and one water-soluble—designed to work together to maximize visible brightening while supporting skin comfort. It also includes antioxidant-rich ingredients that help defend against drying environmental stressors.

We define “clean beauty” as beauty products developed to meet a high standard for both performance and safety.

Every Counter product is formulated with human health and safety in mind, according to publicly available criteria that guide how we evaluate ingredients, develop formulas, and make decisions about sourcing and packaging. Because transparency matters, we publicly share the standards behind our products. Read more at counter.com/thestandard.