Medik8 Retinal 10 v Geek and Gorgeous Retinal 10: How does the budget serum compare?

In this review I'm comparing Medik8's higher-strength retinal 10 with a same-strength but much cheaper retinal from European brand Geek and Gorgeous.
To put them to the test I used a different serum on each side of my face to see if I could note any differences.

Medik8 retinal 10 https://go.shopmy.us/p-691920
Geek and Gorgeous Retinal 10 https://go.shopmy.us/p-577936 Also worth checking Amazon where it can be cheaper https://amzn.to/49L1BRa

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Edited by David at https://www.redfacilities.com