This is a direct breakdown to help you choose
Worsening neurological symptoms : Progressive weakness, worsening balance problems, or deteriorating cognitive function despite treatment requires urgent assessment
Excellent as a pre- + post-party-like-a-rock-star shot and may help treat male infertility
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[1] [2] However, longstanding neurological complications, such as peripheral neuropathy or cognitive changes, may require three to six months of consistent treatment before significant improvement occurs, and some damage may be irreversible if treatment is delayed
Serious B12 deficiency may cause anemia and nerve damage