🍊C-vitamiini on elintärkeä vitamiini, jonka saannista tulee huolehtia päivittäin.

This text explains the importance of vitamin C for daily health, especially for immune system function and protection against oxidative stress. It notes factors that can increase vitamin C needs, such as stress, smoking, breastfeeding, and heavy physical exertion. It also lists food sources rich in vitamin C and recommends eating fruits and vegetables fresh because storage and cooking can reduce vitamin C content.