Principle Healthcare Vitamin C Effervescent is a supplement that has been formulated with a high level of vitamin C to give you all-year-round support. This vitamin c supplement ensures that your immune system functions normally. Principle Healthcare Vitamin C allows for fast absorption of vitamin c into your bloodstream. This ensures that your body is protected from oxidative stress and also supports your normal skin structure, blood vessels, gums, teeth, cartilage, bones and basically all-round support.