Amazon UK Product Guide
The Medicube NAD EGF Firming Serum is the 30ml red dropper serum for face and neck. If you already know this is the Medicube serum you want, the exact Amazon UK product identifier is B0GCC2JV65.

Medicube NAD EGF Firming Serum
View exact product on Amazon UK
Useful if: you want Medicube's red NAD and EGF serum rather than one of its pink PDRN serums or capsule creams.
The product comes in a dark red 30ml dropper bottle marked EGF NAD Firming Serum. Medicube currently lists it as a new serum in its treatment range.
Medicube has a large and fast changing serum range, so checking the full product name, red bottle and 30ml size is more reliable than searching for “Medicube firming serum” alone.
Medicube positions the serum around NAD+, EGF peptide and collagen extract, with a lightweight face and neck format. It is sold as a firming and elasticity focused serum rather than a PDRN product.
If a particular ingredient matters to you, check the current packaging and live listing before buying because cosmetic formulas can change.
Use it in the serum step after cleansing and toner, before moisturiser. If you already use several active serums, keeping the rest of the routine simple makes it easier to judge which product you actually want to keep using.