Many diet plans cut out entire food groups, which can create nutrient deficiencies as well as health problems. For instance, if the diet is very low in carbohydrates and you have type 1 diabetes or type 2 diabetes, it’s probably not a good fit. And if it’s too restrictive and you’re pregnant or breastfeeding, it’s not a good idea, either. Keep in mind that pregnancy is not a time for weight loss. Speak with your doctor before making any changes to your diet if you are pregnant or breast-feeding.
“There are many diet plans on the market today that promote good health,” says Emily Kyle, RDN, who is in private practice in Rochester, New York. “The key is finding one that does not cause you stress or agony.” Ask yourself questions such as: Would the diet guidelines make you happy? Anxious? Stressed? Are you able to follow them long term? “Factors such as enjoyment, flexibility, and longevity should be strongly considered,” adds Kyle.

Elena Paravantes, RDN is a Registered Dietitian Nutritionist, Writer and consultant specializing in the Greek Mediterranean Diet and Cuisine. She has been active as a clinician, consultant and lecturer for 20 years, both in the U.S. and Greece. An expert on the Greek Mediterranean Diet, her interviews and articles have been published in many publications including CNN, U.S. News and World Report, Prevention, NPR, and Shape. Elena has collaborated with a number of organizations including Loyola University, Yale University, University of Missouri, Louisiana State University, and the American College of Greece.
What the diet guru says: According to David Zinczenko, author of The 8-hour Diet, eating all your meals within a set window is the key to burning fat. ‘By carving out an eight-hour window in which to eat to your heart's content, you'll burn your body's fat stores effortlessly. The science is actually simple: for several years, researchers have been producing remarkable weight loss results in people using "intermittent fasting". In this case, fasting is about eating whatever you want, but staying within a sensible eight-hour window. This gives your body the chance to burn away your fat stores for the energy it needs.’
Elena Paravantes, RDN is a Registered Dietitian Nutritionist, Writer and consultant specializing in the Greek Mediterranean Diet and Cuisine. She has been active as a clinician, consultant and lecturer for 20 years, both in the U.S. and Greece. An expert on the Greek Mediterranean Diet, her interviews and articles have been published in many publications including CNN, U.S. News and World Report, Prevention, NPR, and Shape. Elena has collaborated with a number of organizations including Loyola University, Yale University, University of Missouri, Louisiana State University, and the American College of Greece.
Speaking of things you find in the sea, oysters have also been shown to contribute to weight loss thanks to their impressive zinc content. One study found that obese people who consumed 30 milligrams of zinc per day—the equivalent of just six raw oysters—had lower BMIs, weighed less, and showed improvements in blood cholesterol levels. If oysters aren’t your thing, spinach, pumpkin seeds, and mushrooms are also excellent sources of zinc.
People claiming huge benefits of these supplements – despite the lack of solid scientific support – may sometimes have a financial reason to believe in the supplements. Some of these products are sold under a multi-level marketing arrangement, where sales people are paid based on commission. For example, the company Prüvit sells drinkable ketones, called KETO//OS with a multi-level marketing structure.
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