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Genetic factors, type of hair loss, and follicle condition all influence outcomes
Can a vitamin B12 test diagnose leukemia

For neurological disease and dementia, prompt vitamin replacement is necessary before it becomes irreversible or permanent

Oral supplements can take weeks or even months to significantly increase vitamin D levels, whereas intramuscular injections can achieve this in a much shorter time frame

Individuals recovering from acute illness benefit most from IV infusions for illness recovery