Vitamin A is another critical component to our immune systems. Persons low in vitamin A are more susceptible to infectious diseases, including viruses. Again, a simple blood test can verify whether or not this is your problem, especially if you seem to be sick a lot or catch everything going around.
Vitamin A is also important for good eye health. A vitamin A deficiency can lead to poor night vision.
Below is a picture of some vitamin A food sources. But remember, our poor soil in many cases leaves a need for supplementation.

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