Undefined Inc R&R Day Serum
- Ships in 4–8 business days
- 30-day returns
- Vetted clean brands
- Secure checkout
- Vitamin C and alpha arbutin
- Kojic acid and niacinamide
- Fades dark spots and scars
- Fragrance-free, lightweight
What it is
What it does
Who it's for
How to use
How much: A few drops for the face and neck.
2. Follow with moisturizer.
3. Always finish with SPF, since brightening actives work best protected from the sun.
Where it fits: After cleansing and toning, before moisturizer and SPF.
Inside the formula
Vitamin C (3-O-Ethyl Ascorbic Acid)
A stable form of vitamin C that brightens and protects.
Alpha arbutin
A popular brightening ingredient that helps dark-looking areas look more even over time
Niacinamide
Vitamin B3 that evens out skin tone
Kojic Acid
Targets the look of hyperpigmentation and dark spots.
Kakadu plum
An Australian fruit famous for its natural vitamin C, the heart of Gleam C for a brighter, fresher look
Licorice Root
A brightening botanical with antioxidant properties.
Full ingredient list
Why we stock it
We stock this because brightening serums usually pick one lane. This one stacks five proven brighteners plus plants, so it works on both new marks and stubborn ones.
The Nexus standard
Vetted before it lists
Every brand on our shelf is screened before it can sell here. Fewer than you'd think make it through.
Direct from the maker
We work directly with independent brands and skip the retail markup, so you pay less for the same products.
30-day returns
Changed your mind? Returns are easy within 30 days on unopened products. Secure checkout, always.
About the brand
Undefined Inc
Clean beauty for every body
We stock Undefined because they make plant-based skincare that performs at prices most people can actually afford, and the inclusivity is real, not marketing.
