In these situations, vitamin B12 from food or oral supplements may not be absorbed properly
| | Intensive Performance Protocol | 10mg subcutaneous, 5x/week (weekdays) | 150mg oral, daily | Both compounds AM, pre-training | 6 weeks on, 4 weeks off | Athletic performance research, substrate utilization studies, endurance capacity trials | Higher dosing frequency and dose intensity produce more pronounced short-term shifts in RER and VO2 max, but require stricter adherence and increase washout sensitivity
doi:10.1108/00346659810209791
Why Cost Shouldn't Keep You From Getting Care Vitamin B12 injections reliably help one group of people: those who are actually deficient in B12
Unlike fat-soluble vitamins (A, D, E, and K), which are stored in fat tissue for long periods, water-soluble vitamins are processed relatively quickly: your body takes what it needs, stores a small amount in the liver, and passes most of the rest in urine
Anyone planning research-context use should treat outcome reports cautiously and weigh the FDA-approved alternatives discussed in the comparisons section
