The purpose of this diet is to keep the levels of electrolytes, minerals, and fluid in your body balanced when you have chronic kidney disease or are on dialysis. People on dialysis need this special diet to limit the buildup of waste products in the body.
Vega is the brightest star in Lyra, and the fifth brightest star in the sky. It is the third brightest star in the Northern night sky, after Sirius and Arcturus, and can often be seen near the zenith in the mid-northern latitudes during the Northern Hemisphere summer.
Gienah Corvi is the right-hand star at the top of the box and one of the pointers to Spica (the other Algorab), as if Spica really needs such. Though the brightest star in the constellation, just over the second magnitude line to third (2.59), Bayer oddly gave it the Gamma designation, Alpha a fourth magnitude star beneath the right-hand side of the prominent box.