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.
Half dollars made in 1971 and later are made of copper-nickel and are only worth face value. <br /><br /> Halves dated 1965 to 1969 are 40% silver and are worth about $2.75 <br /><br /> Earlier halves are worth at least $6 for their silver content but may be worth much more to a collector.