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The useful observation in this window is simple tolerability whether the chosen route is comfortable and consistent

The tradeoff is the trip itself, though many patients combine a B12 shot with other errands or with a blood test or a physical

Longevity protocol: Dose: 0.5-1mg daily (lower end) Frequency: 3-5 times weekly Cycle: 8 weeks on, 4 weeks off, indefinite repetition Combine with: Overall health optimization (sleep, nutrition, exercise) Lower doses for longevity reduce cost and theoretical concerns about long-term copper peptide use while potentially maintaining meaningful benefits

Older hairs exist to make room for new growth