Those with Wilson's disease or copper metabolism disorders should avoid GHK-CU entirely
A handful of people notice a difference almost right away, while for others it takes a bit longer to kick in
Mild side effects, like redness at the injection site, can happen but are typically no big deal
The more of it you have, the stronger and more resilient your brain becomes
Have certain medical conditions: Problems that can restrict vitamin B12 absorption include pernicious anemia (a rare autoimmune disease that keeps the body from making a protein necessary to absorb B12), digestive illnesses, such as celiac and Crohns diseases, and immune disorders such as lupus, among others
Besides giving one extra energy, the B12 shots can help to combat deficiencies of the vitamin that lead to fatigue and weakness