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Bethany compared two lash serums, Lash Fridays and HydroPeptide. She applied HydroPeptide on her right eye and Lash Fridays on her left eye, including her bottom lashes. Unfortunately, HydroPeptide caused burning and leakage from the packaging. However, both serums performed equally in terms of lash growth. Bethany suggests opting for the cheaper alternative, Lash Fridays, due to its similar effectiveness. Despite its drawbacks, HydroPeptide may still be a viable option for those seeking lash growth.