Insufficient amounts of this vitamin cause scurvy. Vitamins are essential micronutrients that cannot be synthesized by the body; and therefore, must be in the food. Because ascorbic acid has not been reliably available to them, meat-eating animals have retained the ability to synthesize ascorbic acid from basic raw materials found in their meat diet – therefore, it is not a vitamin for them. (In other words it is not “vital” or essential to be preformed in their food supply.) Because humans have lived throughout most of their evolution on diets with very little animal matter, they have had to develop or retain the ability to synthesize some substances they need that are abundantly found in meat.
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