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B12 may be injected into a muscle or under the skin at 100 mcg daily for a week, every other day for another week, and then every three or four days for a month
The prevalence of B12 deficiency in those older than 60 years is between 10% and nearly 20%.7,8 Because multiple causes can coexist in elderly patients, including poor absorption, protracted metformin use, and reduced dietary intake, these patients have the greatest risk for B12 deficiency and should be carefully monitored for signs of deficiency
The peptide's short half-life necessitates daily administration for consistent therapeutic effects
The standard cycle is 8 to 12 weeks on, followed by 4 to 8 weeks off
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