A 2015 study released by Johns Hopkins Medicine found little reliable evidence that most commercial weight-loss programs â including Medifast â resulted in people achieving long-term weight loss. In general, a low-fat diet involves restricting your fat intake to 30% of your daily calories. While this rapid reduction in calories may result in overall weight loss, research has shown that it can lead to significant muscle loss (22). What’s more, low-carb diets appear to be quite effective at burning harmful belly fat (26, 27, 28). Real success stories (or casting call participants with complementary program provided). However, the diet is expensive, repetitive, and doesn’t accommodate all dietary needs. The Optavia diet has additional benefits that may boost weight loss and overall health. While the Optavia diet hasn’t been researched specifically, a 40-week study in 90 people with excess weight or obesity on a similar Medifast program revealed a significant reduction in blood pressure (13). It restricts the consumption of processed foods, grains, sugar, and dairy, though some less restrictive versions allow for some dairy products like cheese. February 27, 2018 by Dominique Michelle Astorino. 1 First 4 weeks only. Sonoma Diet Review: Does It Work for Weight Loss? Vegetarianism and veganism are the most popular versions, which restrict animal products for health, ethical, and environmental reasons. Many of the restricted food groups are high in calories, so limiting them may aid weight loss. These services can help. Best Weight Loss Meal Delivery Programs. Therefore, you should take their guidance with a grain of salt and talk to your healthcare provider if you have any concerns. As such, it can be expensive, difficult to maintain, and harmful to your health. Still, a study on a similar Medifast plan noted that only 25% of participants maintained the diet for up to 1 year (16). Furthermore, those who aren’t interested in cooking can buy packaged meals called Flavors of Home to replace Lean and Green meals. Also, it’s flexibility can be a downfall if dieters choose unhealthy foods. What all of our top picks have in common is that they are currently the best on the market. Explore their distinctive features in the mini-reviews below and choose the one that best satisfies your personal needs. Some vegetarians may likewise avoid eggs and dairy. In addition to the scale dropping, weight loss programs have a wide range of other health benefits, from improving cardiovascular health to supporting healthy brain function ().Weight loss programs may also be able to treat or prevent some mood disorders, including depression (). The company also provides specialized programs for nursing mothers, older adults, teens, and people with diabetes or gout. The Optavia program has additional benefits, as it’s easy to follow and offers ongoing support. How to Lose Weight Fast: 3 Simple Steps, Based on Science, A Low-Carb Meal Plan and Menu to Improve Your Health, The 25 Best Diet Tips to Lose Weight and Improve Health, Mediterranean Diet 101: A Meal Plan and Beginner's Guide, The 11 Best Meal Planning Apps to Help You Lose Weight, The Paleo Diet — A Beginner's Guide Plus Meal Plan, The Complete Beginner’s Guide to the DASH Diet. The Optavia diet relies heavily on prepackaged food items. What it is, how it works, what to eat, what to avoid and a sample paleo meal plan for one week. ... With different approaches to fitness and food, these programs are customizable to your needs. For example, in one 3-week study, 14 healthy adults following a paleo diet lost an average of 5.1 pounds (2.3 kg) and reduced their waist circumference — a marker for belly fat — by an average of 0.6 inches (1.5 cm) (37). 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