The reason is that serum B12 measures circulating vitamin B12, not tissue stores
TB-500 binds to actin, a structural protein inside cells, which preclinical researchers believe helps mobilize the satellite cells and fibroblasts responsible for muscle and connective-tissue regeneration
DAC stands for Drug Affinity Complex a structural addition that binds the peptide to albumin in the blood, extending its half-life from 30 minutes to several days
Some specialty compounding pharmacies offer this concentration, though it is less widely available than 10mg/ml or 20mg/ml
However, it is important to remember that while methylcobalamin is a powerful tool for supporting the methylation cycle, clearing homocysteine, and repairing the myelin sheath, it is not a standalone cure