1. Many times, you cannot eat hot food due to inflammation / ulceration in mouth.

• Lack of enough vitamins (particularly vitamin B complex) in the diet causes inflammation / ulceration in the mouth.
• This inflammation causes biting the inside of your cheek.
• Therefore, hot and spicy causes irritation to the sores.

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2. Some persons experience difficulty in night vision since their childhood or adolescence.

• Our retina consists of two types of light sensitive cells viz. rod shaped and cone shaped cells.
• Rod shaped cells respond to the intensity of light while cone shaped cells respond to the colour of light.
• Vitamin A (especially β-carotene) is required for proper functioning of the rod shaped cells.
• Hence, persons deficient in Vitamin A experience difficulty in night vision since their childhood or adolescence.

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