Can vitamin C supplements be taken long-term?

Generally, for individuals whose dietary intake of vitamin C is insufficient, long-term supplementation with vitamin C supplements is acceptable. However, for those with a balanced diet and adequate vitamin C intake, long-term use of vitamin C supplements is usually not recommended. Detailed explanations are as follows:

Vitamin C is a water-soluble vitamin that participates in various physiological functions, such as promoting collagen synthesis, antioxidant activity, and enhancing immunity. For individuals with insufficient dietary vitamin C intake, long-term supplementation with vitamin C supplements is acceptable. However, the daily intake should be controlled within the recommended range, as excessive intake may cause adverse effects such as diarrhea and nausea.

For individuals with a balanced diet and sufficient vitamin C intake, long-term use of vitamin C supplements is generally not recommended. This is because vitamin C supplements typically contain high levels of vitamin C, which is acidic in nature. Prolonged use may disrupt metabolic functions and potentially lead to excessive deposition of urate, increasing the risk of gout. Additionally, long-term use of vitamin C supplements may irritate the gastrointestinal mucosa, making their prolonged consumption inadvisable.

In daily diets, it is recommended to consume appropriate amounts of food according to personal taste and needs, ensuring a balanced and nutritionally adequate diet.