The aging of America and a trend toward self-medication have perked up sales of vitamins and nutritional supplements, photonutrients, herbs, minerals, and homeopathic remedies. Nutritional supplement kits have also become popular, with The Weider Nutrition Group rolling out its PrimeTime Men's Health System. Analgesics posted the largest percentage of sales, almost 1%, at discounters, due primarily to the popularity of longer-lasting versions of many of today's most popular pain relievers.