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[73] As noted above, the completely synthetic laboratory synthesis of B 12 was achieved by Robert Burns Woodward and Albert Eschenmoser in 1972, though this process has no commercial potential, requiring more than 70 steps and having a yield well below 0.01%
Pharmacies with immunization services may also provide supervised B12 injections after an online consultation. At locations such as CVS MinuteClinic, licensed providers review your medical history, confirm that B12 injections are appropriate, and then administer the injection on site. This option can be convenient for patients who need ongoing injections and prefer easy access, extended hours, and transparent pricing
Patients with a severe needle phobia, tremors, poor eyesight, or cognitive impairment should have a partner, family member, or healthcare provider administer the injection instead
There are several different dosing regimens for this type of B12 therapy
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