Slim Fast Diet
4 Aug
How does the Slim-Fast Diet work?
Your 1,200 calories a day will come from three snacks (half a banana, a pear, or a Slim-Fast Snack Bar, for example), two Slim-Fast meal replacements (a bar or a shake), and one 500-calorie meal you prepare. Slim-Fast is best for people who need to lose about 20 pounds, which should take 8 to 10 weeks; most people are likely to have trouble sticking to the regimen longer than that. Still, many dieters use Slim-Fast products as occasional meal replacements even after losing weight to make maintenance easier.
How well does it conform to accepted dietary guidelines?
Fat. In the 2010 Dietary Guidelines for Americans, the government recommends that 20 to 35 percent of daily calories come from fat. Slim-Fast provides a healthy 30 percent.
Protein. Slim-Fast provides 20 percent of daily calories from protein.
Carbohydrates. The government recommends that carbs supply 45 to 65 percent of daily calories. Slim-Fast is at 50 percent.
Salt. Government guidelines call for a daily maximum of 2,300 milligrams of sodium, or 1,500 milligrams for those 51 and older, African-Americans, and those with hypertension, diabetes, or chronic kidney disease. Slim-Fast products contain anywhere from 55 to 325 milligrams of sodium per serving. Three of the company’s snack bars, one meal bar, and one shake a day—a typical amount—will supply about 560 mg. By preparing one of Slim-Fast’s 500-calorie recipes, it’s possible to meet either of the recommended limits.
Other key nutrients. The 2010 dietary guidelines call these “nutrients of concern” because many Americans get too little of one or more of them:
Fiber. Slim-Fast recommends between 25 and 35 grams of fiber a day, in line with government guidelines.
Potassium. According to the 2010 Dietary Guidelines, a sufficient amount of this important nutrient (see daily nutritional snapshot) counters salt’s capacity to raise blood pressure, decreases bone loss, and reduces the risk of developing kidney stones. It’s not that easy to get the recommended daily 4,700 mg. from food. (Bananas are high in potassium, yet you’d have to eat 11 a day.) Most Americans take in far too little. Slim-Fast products offer 140 to 600 mg. per serving; the company suggests loading up on fruit and vegetables to get more. Depending on snack and 500-calorie meal choices, however, dieters may fall short of the recommended amount.
Calcium. It’s essential not only to build and maintain bones but to make blood vessels and muscles function properly. Many Americans don’t get enough.
Women and anyone older than 50 should try especially hard to meet the government’s recommendation of 1,000 mg. to 1,300 mg. Meeting the goal on Slim-Fast is easy: Each shake contains 500 mg. of calcium, and meal bars contain 300 mg.
Vitamin B-12. Adults should shoot for 2.4 micrograms of this nutrient, which is critical to proper cell metabolism. You shouldn’t have a problem meeting the guidelines on Slim-Fast. Slim-Fast shakes contain 35 percent of the recommended daily amount of vitamin B-12; meal bars contain 20 percent.
Vitamin D. Adults who don’t get enough sunlight need to meet the government’s 15 microgram recommendation with food or a supplement to lower the risk of bone fractures. Slim-Fast shakes contain 35 percent of the recommended daily amount, while meal bars have 20 percent. And eating just 3 ounces of sockeye salmon for your daily home-cooked meal will provide 20 micrograms of vitamin D, satisfying the requirement.
Supplement recommended? No. Slim-Fast products contain adequate vitamins, minerals, and nutrients for the typical adult. A French Vanilla Shake, for example, contains 35 percent of the daily recommended vitamin A, 35 percent of vitamin D, 100 percent of vitamin C, and 50 percent of recommended calcium. In a study published in the Journal of Nutrition in 2004, researchers split 66 overweight and obese Australians into two groups: One consumed two Slim-Fast meal replacement products and one low-fat meal each day, and the other group followed their own low-fat, low-calorie diet. The Slim-Fast dieters consumed more magnesium, calcium, iron, and zinc than the other group (but less dietary fiber).
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