One of the first signs of spring is the appearance of asparagus.  Whether you're lucky enough to grow asparagus in your home garden (or have a friend who does!), fresh asparagus is a treat.  And if you've never tasted fresh asparagus, now's the time!  Asparagus is an excellent source of folic acid, and also contains Vitamin C, thiamin, and Vitamin B-6.  The National Cancer Institute reports that asparagus is the best food source of glutathione, a cancer fighting agent.  Glutathione also may r...
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