while hemoglobin did not significantly change from 700 pg/mL and onwards. Vitamin B12injections were used by 34% of athletes, significantly more often by endurance than by strength athletes.
Annual booster injections of the vaccine are required to maintain immunity. Mild local reactions consisting of slight tenderness and redness at the injection site can occur in approximately 30% of recipients. Severe local reactions occur infrequently and consist of extensive swelling of the forearm in...