The frequency of injections depends on your individual needs and health goals
Yet, a randomized, double-blind, placebo-controlled trial in 215 men (35-55 years old) found that daily supplementation with B vitamins (at 3 to 13 times the current RDA, except for folic acid, which was included at a dose equivalent to the RDA), vitamin C (500 mg/day), zinc (10 mg/day), and magnesium (100 mg/day) for 33 days had no effect on measured performance of executive functions, including the Stroop color-word test, the peg-and-ball task, and the Wisconsin card-sorting task (134)
R.DebeliusJ
J Mol Neurosci 20:349-356
BPC-157 is surprisingly free of side effects, and has been shown in research thats been happening since 1991 to repair tendon, muscle, intestines, teeth, bone and more, both in in-vitro laboratory test-tube studies, in in-vivo human and rodent studies, and when used orally or inject subcutaneously (under your skin) or intramuscularly (into your muscle)
Studies on the AD model primarily utilized rats in behavioral experiments designed to mimic cognitive impairment