The economic analysis represents an estimate only , based on the assumptions and costing methods explicitly stated above
While direct delivery through injections enables maximum absorption and significant benefits for those with deficiencies, not everyone may experience the same outcomes with other advantages
B12 deficiency can cause fatigue and slow metabolism
PubMed 18068698 TB-4 / TB-500 product mislabeling documented bidirectional mislabeling between full-length TB-4 (43 aa) and the TB-500 fragment (residues 1723) in marketed peptide products: Esposito M et al
Symptoms of vitamin B12 deficiency can vary widely and may include fatigue, weakness, pale skin, shortness of breath, neurological symptoms such as numbness or tingling in the hands and feet, difficulty walking, memory loss, and mood changes