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Can Drinking Magnesium Citrate Make You Lose Weight?

author image Jill Corleone, RDN, LD
Jill Corleone is a registered dietitian and health coach who has been writing and lecturing on diet and health for more than 15 years. Her work has been featured on the Huffington Post, Diabetes Self-Management and in the book "Noninvasive Mechanical Ventilation," edited by John R. Bach, M.D. Corleone holds a Bachelor of Science in nutrition.
Can Drinking Magnesium Citrate Make You Lose Weight?
Feet on scale Photo Credit: Buena Vista Images/DigitalVision/Getty Images

Losing weight is never as simple as drinking a medication such as magnesium citrate. As a laxative, magnesium citrate may help you lose temporary water weight, but may also have unpleasant side effects. Laxatives do not help with burning fat and are never a long-term solution for weight loss. If you're trying to drop some pounds, consult your doctor or a dietitian to design a healthy diet and exercise plan that works for you.

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What Is Magnesium Citrate?

Magnesium is a mineral naturally found in a variety of different foods that your body needs for a number of biochemical functions, as well as to make muscle tissue, and to regulate blood pressure and blood sugar.

Magnesium citrate, however, is an over-the-counter medication used to treat occasional constipation. It works by drawing water into the intestines, which helps soften stools and increase transit time. Typically, it produces a bowel movement anywhere from 30 minutes to six hours after you take it, according to

What Happens When You Drink Magnesium Citrate

Magnesium citrate is not labeled as a supplement for weight loss. Because magnesium citrate is a laxative, you might believe it prevents your body from absorbing calories from the food you eat, therefore helping you to lose weight. This is not the case, however. Although drinking magnesium sulfate may cause you to have a bowel movement and the number on your scale may go down -- the lost pounds are because the bowel movement caused you to lose fluid -- and not because your body didn't absorb calories from what you ate. Laxatives such as magnesium citrate work in the lower part of your intestines, after all the nutrients and calories have already been absorbed.

To top it off, you'll likely regain the weight you lost after your next beverage, even if your next drink is calorie-free water.

Side Effects and Dangers of Magnesium Citrate

Magnesium citrate is not a very good way to lose weight and it may also cause unpleasant side effects, which include stomach cramping, loose, watery bowel movements, nausea, dizziness or increased sweating.

Taking magnesium citrate for purposes other than occasional constipation may also be dangerous. Frequent, loose bowel movements cause you to lose not only water, but also electrolytes. This imbalance may cause weakness, seizures and -- in a worst-case scenario -- a heart attack. Also, chronic use of laxatives can lead to dependence on them for regular bowel function, which may cause permanent damage to your colon, according to the Centre for Clinical Interventions.

Healthier Weight-Loss Options

Instead of turning to a liquid supplement to help you lose the weight, you will be better off going with the route that works: a healthy diet and exercise program. Start by filling your diet with the right foods, eating more fruits, vegetables, whole grains, lean proteins and healthy fats. To get the most nutritional bang for your calorie buck, fill half your plate with fruits and veggies, one-quarter with a lean protein and the other quarter with a healthy whole grain.

When it comes to exercise, the Academy of Nutrition and Dietetics says to aim for a daily minimum of 30 minutes of moderate-intensity aerobic exercise, such as a hilly bike ride or brisk walk. You should also try to include whole-body strength-training exercises twice a week, such as lifting weights or body resistance exercises, to help build and maintain muscle mass.

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