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Possible Side Effects Side effects are uncommon but may include mild soreness at the injection site or a temporary headache
The standard dosage for Vitamin B12 injections in adults is 1000 mcg (1 mg)
Older age : Due to changes in dietary nutrient intake (usually from eating less overall) and also decreased production of stomach acid, the elderly tend to have reduced levels of vitamin B12
Then the dose can be given every 3-4 days for 2-3 weeks or until complete remission
A 2017 study found that B12 supports healthy sperm by increasing sperm count and reducing damage to DNA
Heavy alcohol consumption can also contribute to weight gain due to its high-calorie content
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