夜盲 干眼 皮肤糙？可能身体缺了它

Core Viewpoint - The article emphasizes the importance of Vitamin A for maintaining health, particularly during winter when many individuals experience dryness in their eyes and skin. It provides guidance on how to supplement Vitamin A through daily dietary choices [1]. Group 1: Importance of Vitamin A - Vitamin A is an essential nutrient with diverse functions, acting as a protector of eye health, maintaining normal vision, and playing a critical role in skin protection, immune enhancement, and growth regulation [2][3]. - It is a collective term for fat-soluble compounds including retinol, retinal, and β-carotene, which are vital for various bodily functions [2]. Group 2: Health Risks of Vitamin A Deficiency - Long-term deficiency in Vitamin A can lead to several health issues, with early symptoms often related to vision, such as night blindness and dry eyes [4]. - Other symptoms include skin problems, decreased immunity, and impaired growth and development in children [4]. Group 3: Sources of Vitamin A - Direct sources of Vitamin A include animal-based foods like liver, egg yolks, and full-fat dairy products, which are highly bioavailable [5][6][7][8]. - Indirect sources consist of plant-based foods rich in β-carotene, found in orange-yellow and dark green vegetables and fruits, such as carrots and spinach [9][10]. Group 4: Cooking Methods for Better Absorption - Cooking methods that incorporate fats can enhance the absorption of Vitamin A and β-carotene, suggesting that sautéing or pairing with fatty foods is more effective than consuming raw [11].