From my experience as a medical professional, B12 injections do play a role in improving energy levels, especially for those who are B12 deficient
( 2 ) In other words, if your B12 levels are low, youll feel it physically and mentally
On/off cycling here is driven by caution, not by tolerance data: because there is no long-term human safety record, building in scheduled off periods is the conservative research default
[5] Topical GHK-Cu is generally considered well tolerated, yet therapy should be avoided in individuals with a known hypersensitivity to copper peptides or any vehicle component
The most common side effects of B12 injections are mild and temporary, including pain, redness, or swelling at the injection site, mild nausea or diarrhea, headache, dizziness, and itching near the injection area