Question

question 20 (5 points)
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stu is trying to increase his dose of vitamin a to improve his vision. what will happen to stus body if he continues eating high quantities of vitamin a after consuming an adequate amount?
a) he wont experience any further vision improvement since his body needs only small amounts of vitamin a.
b) he will store the excess vitamin a and experience even more of its positive impacts.
c) the excess vitamin a will be stored and used to produce energy.
d) his vitamin a stores will increase, and his vision will continue improving.

Explanation:

Vitamin A is a fat - soluble vitamin. Once the body has an adequate amount (which is a relatively small amount for its functions like vision support), consuming more does not lead to further benefits for vision. The body has a limited need for it in terms of vision - related functions. Excess vitamin A is stored (mainly in the liver), but it does not cause continuous vision improvement. Option B is incorrect because there are limits to the positive impacts, and excessive amounts can be toxic. Option C is wrong as vitamin A is not used to produce energy in that way. Option D is incorrect since vision improvement from vitamin A is not an open - ended process with increasing intake beyond adequacy.

Answer:

A. He won't experience any further vision improvement since his body needs only small amounts of vitamin A.