An award-winning, clinically-proven brightening serum by dermatologist Dr. Whitney Bowe that’s formulated with two newer forms of vitamin C for advanced defense against signs of photoaging.

A proprietary antioxidant blend of 15% vitamin C, plus astaxanthin and fermented turmeric, helps to reduce signs of skin aging—targeting wrinkles, discoloration, and uneven skin tone. Skin looks smoother and firmer, with youthful radiance restored.

Clinically-proven results: 

• 100% showed reduced fine lines and wrinkles** 

• 100% saw brighter skin*

• 100% appeared overall younger**

• 96% said dark spots look faded*

- Benefits

• Reduces the look of wrinkles and firms skin's appearance
• Fades the look of dark spots and discoloration
• Brightens the overall appearance of skin, restoring youthful radiance
• Helps defend against free radicals that accelerate skin aging
• Fragrance-free, cruelty-free, gluten-free, vegan, and refillable
• Created by world-renowned dermatologist Dr. Whitney Bowe
• Clinically-proven to drive results
• Winner of Oprah Daily Beauty O-Wards 2024 “Best Vitamin C Serum”
• Winner of Byrdie Beauty Award 2024 “Best Vitamin C Serum”
• Published in a top dermatology journal for its impressive clinical results***

*Independent clinical study of 32 subjects who used Asta C twice a day, as measured at the 12-week time point.

**Independent clinical study of 32 subjects who used Asta C twice a day, as measured at the 12-week time point by an expert clinical grader.

***Konisky H, Bowe WP, Yang P, Kobets K. A clinical evaluation of the efficacy and tolerability of a novel topical antioxidant formulation featuring vitamin C, astaxanthin, and fermented turmeric. J Cosmet Dermatol. 2023 Nov;22(11):3088-3094. doi: 10.1111/jocd.15967. Epub 2023 Aug 22. PMID: 37608511

- Use Instructions

Apply 3-4 pumps onto the face, neck, and chest morning and night. If you’re new to vitamin C, leveling up the strength of your vitamin C, or if you have sensitive skin, patch test on the inner forearm or side of the neck first.

Start using once a day in the morning before working your way up to twice a day, and layering with other skincare actives.

- Ingredients

water/aqua/eau, tetrahexyldecyl ascorbate, glycerin, squalane, propanediol, 3-o-ethyl ascorbic acid, ethylhexyl olivate, sodium acrylates copolymer, citric acid, curcuma longa (turmeric) root extract, astaxanthin, lactobacillus ferment, haematococcus pluvialis oil, melia azadirachta flower extract, melia azadirachta leaf extract, corallina officinalis extract, betaine, coccinia indica fruit extract, helianthus annuus (sunflower) seed oil, rosmarinus officinalis (rosemary) extract, tocopherol, silica, phenoxyethanol, polyglyceryl-4 oleate, ethylhexylglycerin, maltodextrin, sodium phytate, 1,2-hexanediol, mica, butylene glycol, tin oxide (ci 77861), xanthan gum, titanium dioxide (ci 77891).