While vitamin C is essential for health, high doses can cause serious side effects. Learn the risks and how to use it safely, based on research.

Medically reviewed by Patricia Mikula, PharmD Key Takeaways Tablets contain the most accurate dose of vitamin C and are the most shelf-stable.  Powders offer more flexible dosing but can be harsh on ...

When cold strikes in, vitamin C becomes a go-to supplement for many. Some start loading up oranges, some turn towards ...

Zinc is a trace mineral that helps the body produce and activate immune cells that fight infection. It’s also essential for wound healing and DNA synthesis. 3 Without enough zinc, your immune response ...

The relationship between vitamin C dosage and its effects on the duration of the common cold symptoms may extend to 6-8 grams per day. Dozens of animal studies using different animal species have ...

Medically reviewed by Kristie Reed, PharmD Vitamin C can help increase the absorption of iron from plant-based sources and ...

Vitamin C is an essential vitamin. It’s not naturally synthesized in our bodies, so we have to get it in the food we eat or in supplements. There are many health benefits of vitamin C, including ...