<p><strong>Accidental overdose of iron containing products</strong>&nbsp;is a leading cause of fatal poisoning in children below 6 years. Avoid higher doses if you have liver disease or haemochromatosis; excess can cause bloody diarrhea, vomiting, acidosis, darkened stools, abdominal pain. Symptoms may clear in a few hours.<br />
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<strong>Riboflavin</strong>&nbsp;is reported to be completely safe and no toxic symptoms have been reported so far. Higher doses of Nicotinamide may cause vomiting, diarrhea. Sensory neuropathy was observed in individuals consuming more than 200 mg Pyridoxine for very long periods. No case of Folic acid overdodage has been reported.<br />
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<strong>Acute ingestion of Ascorbic acid</strong>, even of massive doses, is unlikely to cause significant effects.<br />
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<strong>Zinc</strong>&nbsp;toxicity has been seen in both acute and chronic forms. Ingestion of 150 to 450 mg of zinc per day have been associated with low copper status, altered iron function, reduced immune function, and reduced levels of high-density lipoproteins. So, Zinc at its RDA dosages dose not cause any significant effect.</p>