By Dr. Mercola. Vitamin B12 is fittingly known as the energy vitamin, and your body requires it for a number of vital functions. Among them: energy production, blood formation, DNA synthesis, and myelin formation. Myelin is insulation that protects your nerve endings and allows them to communicate with one another.
Values for most Kennedy half dollars are cheap, except for the prices of couple scarce coins and error coins, of which there many. 1  The 1970-D Kennedy half dollar is the scarcest, worth about $20 in typical uncirculated grades. 2  The 1998-S silver matte finish Kennedy half dollar is worth $500.
The value of these coins is tied directly to the price of silver. At $20 per ounce, 90% silver coins are worth about fourteen times their face value. A dime would be worth about $1.40, a quarter about $3.50, and a half dollar, about $6.00. At the same silver price of $20, 40% silver half dollars are worth approximately $2.50 each.