<human>:  What vitamins are good for me during the winter period?
<bot>: Vitamin D, vitamin C, and vitamin A are all important for a healthy diet during winter. Vitamin D helps to bolster the immune system, vitamin C helps to fight off colds and flu, and vitamin A helps to keep skin and eyes healthy even in cold weather. Additionally, it is important to make sure to have a balanced diet to get additional vitamins and minerals that can help with staying healthy during winter months.