Most people who have a vitamin B12 injection feel either nothing different or a gradual lift in energy over the following days
[3] [4] There are certain clinical conditions under which Lipo-B injections should be avoided or used only with extreme caution
If you want to know why do I feel tired after B12 injection, let's explore
A B12 shot is not a stimulant, so you should not expect a sudden caffeine-like jolt minutes after your appointment
Sublingual B12, which bypasses the gastrointestinal tract, is the least invasive and potentially most cost-effective option, especially for individuals with impaired absorption, making it an attractive alternative for long-term and patient-friendly management (Vidal-Alaball et al., 2006)
Allow 48 to 72 hours for process