Vitamin C, also known as ascorbic acid or ascorbate, is a common water-soluble vitamin important to human nutrition. We do not have the ability to synthesis vitamin C and must rely on fresh fruits and vegetables, especially citrus fruits, to provide us with it. Vitamin C may be a simple structure, however, it is involved in many complex processes of the body. Vitamin C is required for the synthesis of collagen and carnitine, the synthesis and catabolism of tyrosine, and the formation of neurotransmitters. It is an important antioxidant as well, with the ability to fight off free radicals such as reactive oxygen species and reactive nitrogen species. The antioxidant qualities also lead vitamin C to display anticarcinogenic activities. The vitamin supports the immune system and demonstrates antiatherogenic activities. Vitamin C can be found in many forms, such as with bioflavonoids, as effervescent vitamin C, as acerola, with rose hips, as reduce-acidity, as non-acid, and as ascorbate and vitamin C metabolites. Vitamin C makes well-established contributions to the body and supports good health. It is important to ensure that your body is receiving adequate amounts for proper functioning and well-being.
It is not recommended that vitamin C be combine with warfarin, acetaminophen, or ethinyl estradiol due to decreased effectiveness of the drugs. Supplementation of vitamin C may be considered with long term use of the following drugs due to a decrease in ascorbic acid: aspirin and other salicylates, dihydropyridine calcium channel blockers (DCCBs), estrogens, oral contraceptives, and nicotine.
As with many other supplements, the side effects of vitamin C appear to be related to dosage. Adverse effects are uncommon in doses up to 3 grams daily. Upwards from that may bring gastrointestinal side effects such as nausea, vomiting, diarrhea, heartburn, abdominal cramps, fatigue, headache, insomnia, and drowsiness.