L., Maloney W., Yang F
Use semen analysis parameters, DNA fragmentation, hormone panels, and clinical signs like libido and energy
Who should not use it Its not the right choice for patients with: active cancer or a cancer history (stimulating cell growth signals can be harmful in these cases) active autoimmune conditions, where anything that affects the immune system carries additional risk pregnancy or breastfeeding significantly compromised liver or kidney function These arent minor caveats

This may include instances where: You need a stronger product to achieve your goals (e.g., deep hyperpigmentation, severe acne, etc.) You already use another product containing copper (this could be unsafe) An essential part of your skin care routine is a harsh active, vitamin C, strong exfoliant, or salicylic acid many of which are common ingredients in acne treatments and anti-aging products (copper peptides shouldnt be mixed with them) Using copper peptides may be unsafe (i.e., you have Wilsons disease, a peptide allergy, or active/suspected cancer) Youve tried a copper peptide product in the past and experienced an adverse reaction (e.g., copper uglies or troublesome side effects) If youd like some alternatives to copper peptides, we go over a few in the Alternatives to copper peptide serums section later in this guide