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 »

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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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The daily dosage for vitamin C varies depending on age, gender and lifestyle choices such as smoking. The National Institutes of Health provide a list of the average daily recommended amount of vitamin C in milligrams, a... More »

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As of 2015, the recommended dose of vitamin D is 600 international units for adults from ages 18 to 70, according to Mayo Clinic. Individuals over the age of 71 should take 700 international units of vitamin D. More »

www.reference.com Health Medications & Vitamins Vitamins & Supplements

The daily dosage for vitamin C varies depending on age, gender and lifestyle choices such as smoking. The National Institutes of Health provide a list of the average daily recommended amount of vitamin C in milligrams, a... More »

www.reference.com Health Medications & Vitamins Vitamins & Supplements

The recommended amount of vitamin C in an adult's daily dietary intake is between 65 and 90 milligrams, explains Mayo Clinic. However, up to 2,000 milligrams can be ingested by an average adult and still be considered sa... More »

The correct dosage for vitamin B-12 injections depends on the patient's age and the reason for the injection, states Mayo Clinic. For adults with vitamin B-12 deficiencies, doctors often prescribe 1,000 microgram intramu... More »