Many weight loss plans -- carbohydrate cycling, ketogenic diets, liquid diets -- can be complicated, so a diet of bread and water alone may seem attractive due to its simplicity.

Collagen is a group of naturally occurring proteins found in the connective tissue of most animals. Collagen pills are nutritional supplements containing collagen proteins obtained from shellfish, poultry, pigs, or cows and is taken orally for its potential nutritional benefits.

The Cambridge Diet initially was developed in the 1970s at Cambridge University as a low-calorie meal replacement consisting of three shakes daily. It claims to contain nutritionally complete meal replacements, according to Cambridgediet.com.

Whey and casein are dairy-based proteins, naturally found together in milk. When isolated and sold as dietary supplements, each has advantages for weight loss, and neither holds a clear upper hand.

Phentermine is a prescription medication used for weight loss, but it can cause various side effects. Learn about the benefits and risks of using phentermine, including its interactions with other medications and potential allergic reactions.

Whether a Fiber One bar is an effective option for your weight loss plan depends on the type of diet you're following. The bars are not sold specifically as diet food, but by checking the nutrition information on the box, you may find they can help you reach your individual weight loss goals.

ESR, or erythrocyte sedimentation rate, is a medical test that measures how much inflammation occurs throughout your body. A high lymphocyte count indicates an increase in white blood cells.

Most weight-loss supplements claim to help patients lose weight in a short time. Unlike prescription drugs, over-the-counter weight-loss supplements are not subjected to rigorous standards. According to MayoClinic.com, chitosan is an over-the-counter weight-loss supplement that helps block dietary fat.

GNC Burn 60 is an over-the-counter diet pill that promises to help you burn more calories after each dose. In this way, the product targets consumers who are working on their diets, but want to see results more quickly. The marketing on the GNC.

A variety of dietary supplements exist for helping to manage weight, lower cholesterol or provide more nutrients to the body when eating regular foods does not. Supplements often contain dietary ingredients such as vitamins, minerals or extracts. The U.S.

Hydroxycut is an over-the-counter supplement marketed to individuals looking to lose weight and build muscle mass. Products found in the Hydroxycut line include Hydroxycut Pro Clinical, Hydroxycut Pro Clinical Caffeine-Free, Hydroxycut Shape and Hydroxycut Hardcore Pro Series.

Hydroxycut products, a popular series of weight loss supplements, were voluntarily recalled from the market by the manufacturer in response to a warning issued by the U.S. Food and Drug Administration (FDA). The FDA received 23 injuries reported by Hydroxycut users.