Polyamines: agmatine, spermidine/spermine, and putrescine-derived GABA Synthesis, vesicular loading, and transduction of agmatine co-transmitter Agmatine (Agm) is a polyamine primarily produced from the decarboxylation of L-arginine, putting its synthesis in competition with NO and urea production (Figure 1)
How prevalent is vitamin B12 deficiency among vegetarians? Nutrition Reviews 71(2) (2013): 110117
In certain circumstancessuch as pregnancy, concurrent illness, or rapid metabolic turnoverB12 requirements may increase, and dosing adjustments may be necessary under medical supervision
Doctors don't routinely test for vitamin B12 levels, so vitamin B12 deficiency can go unnoticed
PDRN injections (popularly known as "salmon sperm injections") are also thought to stimulate tendon healing and help with pain relief, with initial research showing promising results and no serious side effects
Note that the costs, dosages, and approved uses are U.S.-based