b12 injection kits walgreens Vitamin and helps maintain overall health and vitality when used under veterinary supervision Cyanocobalamin Vitamin B12 Injection 1000

Each has its own mix of ingredients

B12 can help offset that

Immune System Support Intense training can sometimes suppress the immune system, making athletes more susceptible to illness

Clinical studies show that B12 injections have no major side effects, though rare cases of sensitivity may occur [20]

[1] Other rare side effects noted (mostly in older literature or high-dose use) include: polycythemia vera and peripheral vascular thrombosis in patients receiving repeated injections (though these associations are not well understood, they were listed in prior product literature as possible adverse events)

If you experience persistent nausea, the dose escalation protocol matters enormously