Oral Supplements: A Quick Comparison For people with a confirmed deficiency, especially those with absorption problems, injections generally act faster than oral supplements: Injections: bypass the gut, reliably reach the bloodstream, and often produce noticeable changes in energy and mental clarity within days for those who are deficient
Medicare Part D covers insulin needles, Medicare Part B does not
Sublingual B12 Sublingual lozenges/drops are available as cyanocobalamin or methylcobalamin
Given that absorption through the gastrointestinal tract can be impaired in some individuals, injections provide a reliable alternative to oral supplements
Sometimes just seeing an objective third party and unloading your issues makes you feel better, says film director Peyton Reed, who once had a doctor give him a B12 shot on set when he was on the cusp of getting a coldan injection that he believes kept the cold at bay