The compounds in champagne, combined with the phosphorus, lithium and zinc it contains, give it detoxifying, antibacterial and antioxidant properties.
In particular, polyphenols protect the skin's elastin and collagen fibers.
What's more, the tartaric acid it contains is a brightener that helps even out skin tone.
All these benefits explain why champagne baths were so popular with wealthy women in the 19th century, and later with Sarah Bernhardt and Marilyn Monroe.