2元维C和上百元维C，有区别吗？

Core Insights - The article discusses the differences between various vitamin C products available in the market, highlighting the price range from 2 yuan to over 100 yuan and the implications of these differences on health and nutrition [1][4]. Group 1: Vitamin C Importance - Vitamin C, also known as ascorbic acid, is an essential nutrient for the human body, with deficiencies leading to scurvy, gum bleeding, tooth loss, and severe health risks [2]. - In China, the average daily intake of vitamin C for residents aged 65 and above is 71.8 mg, while for adults aged 18 to 35, it is 56.41 mg, compared to the recommended daily intake of 100 mg [2]. Group 2: Differences in Vitamin C Products - There are significant price differences in vitamin C products, with synthetic versions priced lower and marketed as OTC drugs, while natural vitamin C is sold as health supplements at higher prices [4]. - Both natural and synthetic vitamin C have the same chemical structure and health benefits, as they serve the same function in the body [4]. Group 3: Supplementation Recommendations - To ensure adequate vitamin C intake, it is recommended to consume 500 grams of vegetables and 250 grams of fruits daily, which are rich sources of vitamin C [6]. - For those concerned about insufficient intake from food, taking vitamin C supplements of 100 mg to 200 mg daily is suggested [7]. - It is important to note that excessive intake of vitamin C, whether natural or synthetic, is not beneficial and can be harmful [8].