Vitamin C plays an important role in your body and has many health benefits. Along with limes, oranges, grapefruits, leafy greens, and other fruits and vegetables, lemons are a good source of vitamin C. Adding fresh lemon juice to hot tea with honey may help reduce phlegm when you're sick. Drinking hot or cold lemonade may also help.
While these drinks may not clear up your cold entirely, they can help you get them vitamin C that your immune system needs. Getting enough vitamin C can help relieve upper respiratory tract infections and other illnesses.