Two Day Diet pills are a weight-loss supplement that claim to be "all-natural," offering users the chance to lose up to 15 pounds in one month. Also known as the Two Day Diet Japan Lingzhi Slimming capsules, these diet pills contain a number of foreign-sounding ingredients such as ebony, Lingzhi, sibutramine, fox nut, seman pruni, dioscoreae and tuckahoe.

Those using Two Day Diet pills are instructed to swallow one or two capsules before breakfast and are advised to drink plenty of water. The supplements are recommended to be used with a balanced eating and exercise plan.

According to the manufacturers, Two Day Diet pills can do several things: Speed up your metabolism, prevent your body from digesting fat, suppress your appetite, boost your energy and expel toxins and waste from your body. However, according to Keri M. Gans, spokesperson for the American Dietetic Association, "there is no scientific research to support the claims."

Reviews of the product are quite often negative, and Gans adds "I recommend healthy eating, not another fad diet with false hope."

Minor side effects listed for the product include dizziness, diarrhea and thirst. Several major complications have also been linked to the product, including stroke and heart attack.

A 30-day supply of 2 Day Diet pills can be purchased for approximately $30 and are available through a variety of online retailers.