The classic symptoms of B12 deficiency are persistent fatigue, tingling or numbness in the hands and feet, problems with memory and concentration, mouth ulcers, a sore red tongue, and pale or yellow-tinged skin
A mild deficiency may not cause symptoms
A licensed pharmacist (Licensed Community Pharmacies Directory | College of Pharmacists of British Columbia) with over 20 years of experience in medication management, specifically medication safety, she has reviewed the information for accuracy and completeness
While it has been in research for over 20 years, it has recently gained a second life thanks to the massive public interest in peptide therapy and the rise of GLP-1 medications.
Its important to note that for individuals who already have normal B12 levels, scientific evidence does not support the idea that B12 injections will further increase energy or provide a significant energy boost. Your body will simply eliminate any excess B12 it doesnt need
In fact, going beyond 500 mcg daily hasnt shown significantly greater fat-loss outcomes (related trial safety/efficacy background)