Did bikini season sneak up on you? Is your soon-to-be worn wedding dress still just a touch too tight? Did a last-minute invite for a beach getaway come your way? You're a lucky dog – and a panicked one too because you want to drop pounds, and fast. These 10 diets are likely to help you lose significant weight within a year, according to a panel of experts who reviewed 38 plans for the U.S. News Best Diets rankings. Just remember: Short-term weight loss is markedly different from long-term weight loss, which is more important for your health.
If you like eating meat and want to lose weight, you might be tempted to try this recent extreme diet fad that proponents have made some pretty outrageous claims about. One: that eating nothing but meat can cure you of autoimmune diseases. The problem is that there’s no good research to support that notion, or any other health claim, for that matter. Indeed, omitting foods known to be good for you — fruits and veggies among them — can lead to a bunch of unwanted side effects, including constipation and potentially dangerous nutrient deficiencies. Still, since you’re cutting out so many food groups, there’s a decent chance you’ll lose weight, experts say. Regardless of any possible benefits you might see, this restrictive approach is definitely one you’ll want to ask your doc about before you even consider diving in.
The trick here is not only to avoid all obvious sources of carbohydrate (sweets, bread, spaghetti, rice, potatoes), but also to be careful with your protein intake. If you eat large amounts of meat, eggs and the like, the excess protein will be converted into glucose in your body. Large amounts of protein can also raise your insulin levels somewhat. This compromises optimal ketosis.
“A lot of people think the foundation of a paleo diet is high-fat meat, but I suggest that it’s vegetables,” says Hultin. The concept is to eat only foods — including meat, fish, poultry, eggs, fruits, and vegetables — that would have been available to our Paleolithic ancestors. This means grains, dairy, legumes, added sugar, and salt are all no-no’s.
Eat Breakfast Every Day. One habit that's common to many people who have lost weight and kept it off is eating breakfast every day. "Many people think skipping breakfast is a great way to cut calories, but they usually end up eating more throughout the day, says Elizabeth Ward, MS, RD, author of The Pocket Idiot's Guide to the New Food Pyramids. "Studies show people who eat breakfast have lower BMIs than breakfast-skippers and perform better, whether at school or in the boardroom." Try a bowl of whole-grain cereal topped with fruit and low-fat dairy for a quick and nutritious start to your day.

This company’s latest plan, Turbo 13, promises you’ll lose 13 pounds (and seven inches from your girth) in the first month. When you join Nutrisystem (membership is required), you’ll mix their pre-packaged meals with food you buy at the grocery store. The plan recommends splitting up your meals into a six a day. As with many diet plans, the research backs the short-term results, but there’s little evidence that it works in the long term. Convenience is the biggest pro; cons are the price and the highly processed foods. Nutrisystem is not for you if you are under 18, pregnant, or breastfeeding, or if you have food allergies. For research-backed tips, try these scientifically proven ways you can start losing weight right now.
When you drink liquid carbs, like the sugar in soda, your body doesn't register them the same way as, say, a piece of bread, according to a review of studies published in Current Opinion in Clinical Nutrition & Metabolic Care. That means, even though you're taking in calories, your fullness cues aren't likely to signal that you're satisfied once you finish off a can. And that can lead to consuming more overall.
If taking the time to slice and dice vegetables holds you back from eating them, then invest in the pre-chopped or pre-washed vegetables. Rene Ficek, RD, the lead nutrition expert at Seattle Sutton’s Healthy Eating says fresh produce is the cornerstone of healthy nutrition—and using pre-chopped vegetables could cut your cooking time in half. “Plus, keeping sliced veggies and prepared dips like hummus are great to have on hand at all time,” Fieck adds.
Meal prep, short for meal preparation, is the process of planning and preparing your meals ahead of time. You can meal prep one day ahead, or take one day to prepare lunch and/or dinner for an entire week. While most meal prep only one or two meals, you can easily meal prep breakfast, lunch and dinner, even snacks for the week ahead. It’s entirely up to you!
This meal replacement plan has mixed scientific evidence to support it. SlimFast promises a reasonable one- to two-pound loss per week, but you’ll need to buy its shakes, bars, and other products. The 1,200-calorie plan allows for one 500 calorie meal of regular food daily, with the rest of the calories made up of SlimFast products, fruits, and vegetables. The hard part will be sticking with the program; also, the SlimFast foods contain a lot of processed ingredients and artificial sweeteners. This isn’t for people younger than 18, or pregnant or breastfeeding women without medical supervision. Make the most of your one meal with 11 simple swaps that lead to dramatic weight loss.
Vegetarians tend to be slimmer than omnivores, according to research. But you’ll have to have a lot of discipline and willpower to pull off a vegan diet. Support is out there—the American Diabetes Association gives its approval to the plan, and there are plenty of resources online such as the Vegetarian Resource Group if you need guidance. Following this rigid way of eating may mean could miss out on important nutrients such as vitamin B12 and calcium, but overall going vegan offers some powerful health benefits. You can expect to lose about two pounds a week. Check out the 13 things that happen to your body when you go vegan.
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Notes: Chop the sweet potatoes and halve the Brussels sprouts, and place on a sheet pan. Drizzle with 2 teaspoons olive oil, season with salt and pepper, and toss to coat. Roast at 450°F (230°C) until tender, about 15 minutes. Season the steak with salt and pepper. In a frying pan over medium-high heat, warm 1 teaspoon olive oil. Cook the steak until done to your liking, about 3 minutes per side for medium-rare. (Consuming raw or undercooked meats may increase your risk of foodborne illness.)
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