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Drowsiness, weakness Nerve injury accompanied by tingling and numbness in the hands and legs Loss of memory, confusion Dementia Depression Seizures Recommended Amounts of Vitamin B12 For men and women 14 years of age and older, the Recommended Dietary Allowance (RDA) is 2.4 micrograms (mcg) per day

Single intravenous or subcutaneous doses at 30 to 60 mcg/kg elevated GH 2- to 10-fold within 2 hours, with IGF-1 remaining elevated for 9 to 11 days [1]

While biotin deficiency is relatively uncommon, individuals with certain metabolic conditions, those taking long-term medications such as anticonvulsants, or patients with poor nutritional absorption may benefit from intramuscular administration

Many customers use this as a reconstitution diluent at home

If you're noticing significant immediate effects, placebo response may be contributing, which isn't necessarily bad but shouldn't set unrealistic expectations for continued dramatic improvements

Persistent tiredness, foggy thinking, or a drop in mood can sometimes be linked to low Vitamin B12