An early symptom of vitamin A deficiency is ________.Multiple Choicenight blindnessswollen tonguehair lossheadaches

Answer

An early symptom of vitamin A deficiency is night blindness.

Explanation

Vitamin A plays a crucial role in maintaining healthy vision, particularly in low-light conditions. Night blindness, or nyctalopia, is often one of the first signs of inadequate vitamin A intake. This deficiency affects the regeneration of rhodopsin, a pigment in the retina necessary for seeing in dim light. Without adequate levels of vitamin A, the body cannot effectively convert light energy into visual signals, leading to difficulties in seeing at night or in dimly lit environments.

While swollen tongue, hair loss, and headaches can be associated with various other nutritional deficiencies or health issues, they are not specific early signs of vitamin A deficiency. Ensuring adequate vitamin A intake through diet is essential for preventing these visual impairments and supporting overall eye health.