ghk cu серум GHK-Cu Peptide for Skin & Hair this concentrated copper peptide serum is thoughtfully formulated to support the appearance of smoother Copper Peptides+ with GHK-CU Night
Description
Respiratory infections Respiratory infections such as colds, flu, or sinusitis can alter taste and smell, leading to metallic taste in mouth

Ahmad MK, Mahdi AA, Shukla KK, et al

Other than that I really like the overall experience

Int J hygiene Environ Health (2007) 210(1):3542

NELSON CP, PARK JM, WAN J, BLOOM DA, DUNN RL, WEI JT, THE INCREASING INCIDENCE OF CONGENITAL PENILE ANOMALIES IN THE UNITED STATES (2005) J Urol 174:15731576
