Possible side effects include: Injection site pain, redness, or bruising Unwanted facial or body hair growth Copper imbalance, which may cause headaches, nausea, or fatigue Flushing or histamine-type reactions in sensitive individuals Injectable copper peptides may not be appropriate for individuals with liver conditions, disorders of copper metabolism (such as Wilsons disease), or significant inflammatory sensitivity
pernicious anemia
A substance that regulates cell growth and immune responses, such as inflammation References : Button at al (2018), Roles of mucus adhesion and cohesion in cough clearance, PNAS Flora et al.,(1997), Attenuation of influenza-like symptomatology and improvement of cell-mediated immunity with long-term N-acetylcysteine treatment
One exception is fluids lining the lower part of the respiratory tract, where it may help to scavenge inhaled toxins and free radicals produced by activated lung phagocytes