Answer – Iron
According to guidelines stated in the “Guidance for Industry: Food Labeling Guide” published by the U.S Food and Drug Administration (FDA) in September 1994 and last revised in January 2013, it is required that Vitamin A, Vitamin C, Calcium, and Iron must appear on nutritional labels if they are contained in the food.
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The procedure is a refraction or vision test. The doctor may use a computerized refractor or simply shine a light into your eyes.
That is false. The advertisements are payed for and not 100% reliable.
If you live near a neighborhood that has lots of trees it can help with air so you can breath so it is healthy and your environment has trees
