Vitamin C is a nutrient your body needs but cannot make on its own, so it has to come from food or supplements. It supports immune function, helps wounds heal, and acts as an antioxidant in your cells. You'll find it in citrus fruits, berries, leafy greens, and peppers—and it's also available as a standalone supplement in various forms and doses. People take vitamin C for different reasons: some aim to prevent colds, others want to support their skin or joints, and some straightforward fill a gap in their diet.
These guides cover the practical questions: which food sources deliver the most vitamin C, how much you actually need, what happens when you take supplements versus eating the nutrient whole, how to choose between powder, tablet, and liquid forms, and what the research says about specific health claims. You'll also learn about absorption, timing, potential interactions with medications, and how to tell if you're getting enough.