Symptoms of severe vitamin B12 deficiency can include visual disturbances, severe joint pain, paresthesia (tingling in the hands and feet), memory problems, depression, anxiety, poor muscle function, ataxia (impaired balance and coordination), changes in reflexes and even infertility
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At the same time I began the BPC-157 protocol, I made other significant changes: Nutrition: Transitioned from a fat loss phase to a bulking phase
Here is how to think about it sensibly rather than chasing a figure
(10 g or 10 ng/kg/day), topical (1.0 g in cream), or per-oral (0.16 g/mL in drinking water) over 90 days and described directional improvements across biomechanical, functional, macroscopic, and histological endpoints, though specific effect sizes and p-values are not reported in the abstract