Method Absorption Rate Advantages Disadvantages Oral pills 1.2-40% depending on intrinsic factor Convenient, widely available Poor absorption, especially with age or GI issues Sublingual Slightly better than pills No need for intrinsic factor, easy to use Still less effective than injectable forms In-clinic IM injection Nearly 100% Highly effective, professionally administered Requires clinic visits, potential travel and waiting time At home B12 injection Nearly 100% Highly effective, convenient, no travel needed Requires training, prescription, and comfort with self-injection IV infusion 100% Immediate delivery to bloodstream Most expensive, requires professional administration For many people especially those with serious deficiencies, digestive disorders, or pernicious anemia at home B12 injection offers the sweet spot of effectiveness and convenience

This systemic mechanism is part of why TB-500 is sometimes considered for injuries that involve more diffuse tissue involvement or chronic, widespread inflammation rather than a single discrete injury site
Signal sensitivity pulsed dosing is the conservative way to avoid blunting the response over time
Carpal tunnel syndrome is one of the most common causes of wrist pain
As a compound that can promote healing, it helps protect the gastrointestinal tissues from damage and can help prevent and heal stomach ulcers or other injuries to the intestinal lining
May be injected intravenously at the discretion of the veterinarian