How to Choose a Vitamin C Serum
When choosing a Vitamin C serum, check six things: the base (water or oil), the form of Vitamin C, the packaging, where it is made, whether it was tested, and what happens if it does not work for you.
The checklist
| Check | What to look for | Noche Y Dia |
|---|---|---|
| Base | Water-based or water-free | Water-free, oil-based |
| Vitamin C form | Ascorbic acid is pure Vitamin C | Ascorbic acid plus an oil-soluble Vitamin C |
| Packaging | Sealed and protected | Glass bottle |
| Where it is made | Clear country of origin | Made in Spain, under EU cosmetic rules |
| Testing | Independent study details | Independent clinical study in Spain, 32 volunteers |
| Guarantee | How long, and do you have to return it? | 365 days, and for most orders you keep the product |
| Clean formula | Paraben-free, cruelty-free | Yes and yes |
Independent clinical study of Noche Y Dia Vitamin C Serum, Vitamin C Face Cream and Vitamin C Concentrate Ampoules, 32 volunteers, conducted by Gaiker and Dr. Goya Analysis, Spain. Individual results vary.
Questions to ask before you buy
Does the texture suit my skin?
Dry or mature skin often prefers silky, oil-based textures. Oily skin may prefer lighter gels.
Where is it made?
The EU restricts or prohibits more than 1,300 substances in cosmetics. Products made in the EU follow those rules. See EU vs US cosmetic rules.
What if it does not work?
Many guarantees are 30 days and require a return. Skin needs 6 to 8 weeks to judge a product, so look for a longer window.
What should I look for in a Vitamin C serum for mature skin?
A comfortable texture, a clear form of Vitamin C, protective packaging, and a guarantee long enough to really test it.
Is a more expensive Vitamin C serum better?
Not necessarily. Compare the base, Vitamin C form, packaging and testing rather than price alone.
How long should I test a new serum?
Give it 6 to 8 weeks of daily use. Our Returnless Refund gives you 365 days.
Check every box, with a year to decide.
Shop the Vitamin C Serum