Consuming too little vitamin C increases the risk of suffering from a scurvy, a condition that occurs due to vitamin C deficiency, as stated by Merck Manuals. The deficiency can lead to other symptoms, including anemia, ... More »

Babies 12 months of age and younger get the vitamin C they need from breast milk, while children ages 1 to 3 need 15 milligrams and children ages 4 to 8 need 25 milligrams, according to Mayo Clinic. Children ages 9 to 13... More »

Most people experience no negative side effects when taking vitamin C in recommended dosages, according to WebMD. However, nausea, vomiting, heartburn, stomach cramps and headache occasionally occur, particularly in peop... More »

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Lack of vitamin C may lead to a condition called scurvy, as stated by Patient. Vitamin C is not made in the body, so a person needs to eat vitamin foods to acquire it. More »

A person can take too much vitamin C under certain circumstances. Vitamin C is water soluble, which means that the body flushes out the vitamin C it doesn't need; however, people who take megadoses of vitamin C can exper... More »

Low vitamin D levels have been linked to cancer, cognitive impairment in older adults, and increased risk of death from cardiovascular disease, according to WebMD. Children with a deficiency can develop severe asthma. Lo... More »

Too much vitamin C, a water-soluble vitamin, is not usually harmful; however, large doses of supplements containing it sometimes lead to gastric upset, headaches and insomnia, according to Mayo Clinic. The recommended da... More »