Zinc supplements range from $4 to $20 a bottle as of January 2016, according to Amazon.com and CVS. These prices may not include sales tax or shipping.
Factors that determine the price of zinc supplements include the brand, retailer, dosage and number of supplements per bottle. For example, CVS sells 50-milligram Radiance zinc caplets in a 100-count size for about $7 per bottle, as of January 2016, notes CVS.
Doses of zinc supplements on Amazon.com range from 15 to 50 milligrams. As of January 2016, a 200-count bottle of Spring Valley 50-milligram tablets is about $9 a bottle, while a bottle of 100-count, Nature Made 30-milligram zinc tablets sells for about $5, reports Amazon.com
Zinc is an essential metal that helps conditions such as age-related vision loss, muscle cramps and taste disorder. Zinc is considered "likely safe" when taken orally in a dose not exceeding 40 milligrams a day, states WebMD.