Benefits and Risks of Long-Term B-Complex Vitamin Supplementation
Long-term, moderate intake of B-complex vitamins can promptly replenish trace elements deficient in the body and support overall nutritional status. B-complex vitamins also facilitate carbohydrate metabolism and promote the metabolism of both fats and carbohydrates, thereby effectively preventing conditions such as oral ulcers, eczema, and seborrheic dermatitis. They help stabilize epithelial tissue and alleviate ocular fatigue caused by prolonged visual strain. Moreover, vitamin B6—part of the B-complex—acts as a coenzyme in various enzymatic reactions within the body and has demonstrated notable efficacy in relieving nausea and discomfort associated with motion sickness and pregnancy.
On the other hand, chronic excessive intake of B-complex vitamins—particularly niacin—may lead to retinal edema and decreased visual acuity. Unsupervised, high-dose supplementation of B-complex vitamins may also induce neurological changes, manifesting as irritability, loss of appetite, and increased fatigue. Additionally, excessive intake may trigger adverse cutaneous reactions, including rash, pruritus, and scaling.
Therefore, it is recommended to take B-complex vitamins strictly as directed by a healthcare professional, avoiding self-adjustment of dosage, which could result in adverse effects.