Can I take a vitamin B complex for a long time?

The common dosage form of compound vitamin B is tablets. Under normal circumstances, compound vitamin B can be taken long-term under a doctor's guidance to address deficiencies. However, self-administering long-term without a clear deficiency may lead to adverse reactions. Detailed analysis is as follows:

If a medical examination confirms a deficiency in B vitamins, or if chronic deficiency results from an unbalanced diet or absorption disorders, long-term supplementation at the recommended dosage under a doctor's guidance can correct the deficiency, maintain normal body metabolism, and is generally safe and unlikely to cause adverse health effects.

If there is no actual deficiency and compound vitamin B is still self-administered over a prolonged period, it may lead to an excess of certain components, potentially causing adverse reactions such as irritability, skin flushing, and gastrointestinal discomfort. Surplus components cannot be utilized by the body and may increase the metabolic burden on the kidneys, thereby harming health.

Before taking compound vitamin B, individuals should understand their own nutritional status and strictly adhere to the recommended dosage. Long-term use should be evaluated by a doctor to avoid blind supplementation.