Personalized Formulations

(Refill Packs) Custom Active Phage Serum

A bundled pack of 3, 4, or 5 refill inserts is available for those who have already experienced their first Custom Active Phage Serum and are looking to replenish their supply.

HSA/FSA Eligible

How refills work
As part of our commitment to sustainability, please note that the outer glass package, cap, and dispenser are meant to be re-used. Simply insert your new refill into your original packaging and recycle your old refill insert when done. 
About Parallel's Custom Active Phage Serums
Powered by Parallel’s unique, high-titer phage technology, we are proud to offer eight different targeted, custom active phage serums for eight different skin microbiome types. The right active phage serum can naturally roll back your bad bacteria and enable good bacteria to flourish, supporting balance, clarity, and radiance. Dermatologist-approved, for healthy, youthful, more resilient skin.

Personalized Prescription

In collaboration with our dermatologists and scientific team, we craft a customized formulation for you that includes multiple prescription-strength ingredients, alongside key actives, that help support your skin health goals.

Personalized Prescription (MD03)

In collaboration with our dermatologists and scientific team, we craft a customized formulation for you that includes multiple prescription-strength ingredients, alongside key actives, that help support your skin health goals.