is sublingual b12 as effective as injections vs Pills: Richmond's Complete Guide Sublingual B12 vs. B12 Injections:

Dosage, Administration, and Duration Recommended Medical Doses Healthcare professionals determine therapeutic doses based on the severity of deficiency or the condition being treated

Inject the water slowly into the drug vial to prevent foaming or aerosolization of drug powder

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The fatigue relief people report from B12 shots when they are not deficient is likely attributable to placebo effect and the positive experience of proactive self-care

Especially beneficial for individuals with B12 deficiencies, fatigue, or dietary restrictions (such as vegetarians), these injections bypass the digestive system for superior absorption and faster effects