Vitamin C is a water soluble vitamin, hence is not stored in the body to any large extent, and if used in excess will be urinated out. It is cited as being one of the least toxic vitamins.
The ideal way to utilise vitamin C is small and often through the day, not as one huge dose, as if used as one large dose it may generate very expensive urine.
Vitamin C is a major nutrient to produce connective tissue, because we must have vitamin C for collagen production, and collagen is the primary protein involved with making connective tissue – this involves bones, skin, arteries and veins. Consequently vitamin C can help all those tissues age in a stronger manner.
Numerous clinical studies support vitamin C with enhancing the immune system, and it is an ideal supplement over the colder months, as can definitely help with infectious conditions.
It is advised to supplement vitamin C with flavonoids, which improves the action of the vitamin, may increase retention in the body, and also provides their own antioxidant effects.
The worst complaints with higher dosages is intestinal distension (swelling) and/or diarrhea.
A rebound effect has been noted with quick withdrawal of higher doses. This may or may not affect some, however it may be advised that if supplementing a substantial daily dose (ie 3-5 grams) to wean off it, especially if you have been at that dose for a good length of time.
A high dose is also not recommended on the contraceptive pill as it may cause break through bleeding, and hence risk of pregnancy. Check with your health practitioner if uncertain of dosing.