This is the safest approach and the one most researchers use
But, B12 mixes can have different strengths
Overuse Effects Using copper peptides too frequently or in high concentrations can lead to an overload of copper in the skin, potentially causing irritation and other adverse effects
These include: Neurological symptoms : tingling or numbness in hands and feet (paraesthesia), difficulty walking, balance problems, memory difficulties, or mood changes Haematological signs : ongoing fatigue, weakness, pale skin, or shortness of breath suggesting anaemia hasn't resolved Glossitis : a sore, red tongue that hasn't improved Cognitive issues : continued difficulty concentrating or memory problems These symptoms, particularly progressive neurological deficits or severe anaemia with cardiorespiratory compromise, may require urgent medical attention
(PubMed) McCleery J, Abraham RP, Denton DA, et al
Self-experimentation carries risks due to lack of regulation