If a reaction occurs, its typically within several weeks after the first injection
Difficulty concentrating and impaired memory: These may indicate a Vitamin B12 deficiency, which can also lead to mental health issues like depression and behavioral changes
| | 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
And it can gradually increase the longer you stay on it
The cost of B12 shots can vary by provider and location, but many clinics offer affordable packages