If you have an absorption issue (which is anyone that has low B12 and is symptomatic of a deficiency but consumes a normal diet including animal derived products) you NEED the injections
Nonetheless, this previous study (Jasinski and Krishnan, 2009a) did not assess the pharmacokinetics of amphetamine to demonstrate the equivalence of the doses used
Camus AM, Geneste O, Honkakoski P et al (1993) High variability of nitrosamine metabolism among individuals: role of cytochromes P450 2A6 and 2E1 in the dealkylation of N-nitrosodimethylamine and N-nitrosodiethylamine in mice and humans
A method of preventing weakness in a patient with Parkinson's disease or of improving or restoring muscle strength of a patient with Parkinson's disease, comprising the step of administering to said patient an amount of one or more hepatocyte growth factor mimics sufficient to prevent, improve or restore to normal said muscle strength, said one or more hepatocyte growth factor mimics having a general structural formula 1 2 3 where R] is one of an N-acyl group, a substituted or unsubstiruted phenyl, a norleucine group, and an amino acid selected from tyrosine, phenylalanine, aspartic acid, arginine, isoleucine, serine, histidine, glycine, cysteine, methionine, tryptophan, lysine norvaline, ornithine, and s-benzyl cysteine