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Pale or yellowish skin
Reviewing classification standards helps buyers avoid compliance concerns
Your body needs B12 for essential functions, so stopping suddenly may not be safe
The injection is quick, usually less than 5 minutes, and is administered into the upper arm or gluteal muscle
B12 generated in the colon, however, is unavailable for absorption (see below)
A 2024 study found deficiency prevalence ranges from 5% to 52% in vegans, with the wide gap reflecting differences in supplement use
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