Final answer:
Tony consuming more than 100% DRI for vitamin A indicates an intake exceeding the standard recommendation for his calorie diet, which may not be beneficial and could be harmful. Individual needs for vitamin A vary and should be considered alongside overall diet and health requirements.
Step-by-step explanation:
If Tony's percent Daily Recommended Intake (DRI) for vitamin A is greater than 100%, it means he is consuming more than the recommended amount of vitamin A for his calorie needs. The DRI values are based on a 2,000 calorie diet, but individual needs may vary. Consuming in excess of 100% DRI does not necessarily confer additional health benefits and can, in some cases, be harmful if it leads to hypervitaminosis A, which is caused by vitamin A accumulation in the body beyond healthy levels.
A supplement label indicating 5000 International Units (I.U.) of vitamin A, with 50% as beta carotene, could easily result in intake exceeding 100% if additional dietary sources of vitamin A are consumed. Comparing this to the adult recommended daily value percentages, taking such a supplement would provide a significant amount of the required intake. However, it's crucial to consider overall diet and specific health needs when assessing the appropriateness of such levels of vitamin intake.