Vitamin C is quite possibly the most recognized vitamin we'll examine. It's talked about around the water cooler during cold and flu season and it's often hyped on the packaging of everything from cereal to juice. Its roots go back in the annals of medicine to the discovery -- and treatment for -- scurvy.
Over time, we've learned it's not just useful as an antioxidant but also for the promotion of muscle, bone, skin, gums, tendons, ligament and cell membrane health. Vitamin C is especially important for men who work out regularly or who have had problems with bone strength or gum health [source: Zelman].
It's true that vitamin C can decrease the intensity and duration of cold and flu symptoms and is helpful for maintaining a strong immune system. And, unlike the previously mentioned vitamins, it's readily available in many foods -- fruits and vegetables are full of it. Still supplementation is often recommended during the cold and flu season and overdose is rare because you'll usually pass the excess through your system.
Next, a meaty issue in the world of nutrition.