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Concentrations between 10 -12 and 10 -9 M helped lengthen hair follicles

Most people notice increased energy within 24 to 48 hours

It may sound unpleasant, but when done right, administering such an injection can be virtually painless, and will allow the absorption of vitamin B12 over a 24-hour period

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Much of the research framing treats it as an orally administered compound, and in practitioner circles it circulates in oral/sublingual forms (capsules, or the reconstituted solution taken sublingually)