If you are unsure whether B12 injections are right for you in the first place, that starts with your GP and a blood test, as set out in the NHS treatment pathway
Dose and source do more to determine your risk than the route itself
identifier, covered or inconsistent lot information, a disturbed closure, or liquid that is discoloured or visibly particulate gives the manufacturer or regulator something concrete to investigate
While natural dietary intake is ideal for overall health, supplements may be considered in specific cases, but only after consultation with a qualified dermatologist or plastic surgeon who can advise on the appropriate form, dosage, and duration
In other words, GHK-Cu is often valued not because it creates dramatic overnight results, but because it may help support healthier skin function over months of consistent use