Thymalin is derived from the thymus and focuses on immune function particularly T-cell maturation, immunorestoration, and reversing age-related immune decline (immunosenescence)
The most common side effect of B12 injections is irritation at the injection site, and injections are typically administered intramuscularly or subcutaneously. Less common side effects may include headache, nausea, diarrhea, itching, or a brief feeling of lightheadedness after the injection
That is why it can be swallowed at all, and why it behaves like a small-molecule drug: real oral absorption, first-pass liver metabolism, a huge volume of distribution (39 L/kg in mice), and off-target enzyme binding
If so, a vitamin B12 injection may be right for you
2 3 Vitamin B12s Reputation Vitamin B12 is popularly known as the energy vitamin