Ketone bodies (including acetoacetate, β-hydroxybutyrate and acetone) are produced mainly by the liver from fatty acids during fasting, prolonged physical activity, starvation, or ketogenic diets (diets that restrict carbohydrates to usually < 50 g/day). The metabolic state in which ketone bodies are utilized as the main energy source for the body instead of glucose is called ketosis. Physiological or nutritional ketosis has been shown to lead to several metabolic advantages including weight management and improvements in glycemic control and blood lipids.1 An…

by Lewis Chang, PhD Ultra-processed foods, or highly-processed foods, are food products manufactured via multiple chemical or mechanical processes that are designed to make them convenient, affordable, palatable, and hygienic. Nutritionally, they tend to be loaded with added sugar, salt, and fat, and devoid of high-quality macronutrients, micronutrients, and fiber. Many ultra-processed foods also contain flavoring agents, artificial colors, cosmetic additives, and preservatives, some of which have exhibited carcinogenic potential in experimental models.1 The packaging may also contain chemicals (such…

by Nilima Desai, MPH, RD Research has established that inflammation is a risk factor for several chronic conditions such as diabetes, cardiovascular disease, arthritis, inflammatory bowel disease, and metabolic syndrome.1 But understanding how inflammation works can be overwhelming. Types of Inflammation Inflammation is classified as either acute or chronic. Inflammation is a natural and necessary component of innate immunity since acute inflammation is the normal physiologic response to injury, infection, or irritation1 and is often short-lived. This acute inflammatory process…

Sedentary behaviors have been linked to obesity, diabetes, cardiovascular disease, and all-cause mortality. In terms of potential mechanisms, research has revealed associations between sedentary time and cardiometabolic risk factors, including higher waist circumference, higher blood pressure, unbalanced glucose and insulin metabolism, and unfavorable blood lipid profile.1 Television watching and its negative impact on health have been well-documented. A recent research study examined whether other types of sedentary behaviors netted a similar, deleterious impact on health. Specifically, the group of public…

America’s metabolic based diseases are on the rise; with over 20 million Americans currently having Type 2 diabetes (T2D), it is expected that 1 in 3 will be diagnosed with this disease in their lifetime.1 Furthermore, every year over 610,000 Americans die of cardiovascular disease (CVD) and the number of people diagnosed with heart disease continues to climb as well. 1 Taken together, the statistics are staggering. Both of these preventable diseases are exacerbated by obesity which, itself, is rising dramatically in the United States.1 It…

by Lewis Chang, PhD  Many nutrition studies utilizing a low fat diet for weight and health management have not consistently demonstrated reductions in cardiovascular events or mortality. In contrast, higher fat diets have netted improved body composition, diet adherence, and satisfying food preferences. However, it is still unknown whether there is an optimal diet composition of fat content for health benefits. A balanced high fat diet (BHFD) is a diet with 50/30/20 ratio of fat/carbohydrate/protein in which the fat component…

In this webinar, Dr. Osama Hamdy, the medical director of the obesity program at the Joslin Diabetes Center, discusses, “Dietary Fat: Should We Change Recommendations.” He begins with basic information on dietary fats. There are three types of lipids: free fatty acids, compound lipids (phospholipids, sterols/cholesterol). When we discuss fatty acids, we mean a chain of carbon atoms, one end called the alpha end, and one called the omega end. It is from that structure that we get the names of polyunsaturated…

In the United States more than 30 million people, approximately 10 percent of the population, have type-2 diabetes (T2D).1 Additionally, one in three adults in the US have prediabetes- that translates into over 84 million adults with hyperglycemia and an increased risk for frank diabetes. Diabetes is associated with other serious health concerns including high blood pressure, cardiovascular disease and obesity.1 A recent cross-sectional analysis examined the impacts of glucose metabolism status (i.e. normal, prediabetes and T2D) on cognitive function and…

by Ashley Jordan Ferira, PhD, RDN Nonnutritive sweeteners were designed to limit caloric intake and assist in weight and blood glucose management,1 but recent findings linked nonnutritive sweetener use to higher adiposity and cardiometabolic risk.2 Nonnutritive sweeteners (NNS) including aspartame, sucralose and stevioside are zero- or low-calorie sugar substitutes commonly consumed in the US.3 Approximately 25% of children and 41% of adults consume low-calorie sweeteners, with increased consumption in adults with higher body weight.3 Although beverages are the top source of NNS, many foods contain these ingredients too. The…

by Ashley Jordan Ferira, PhD, RDN An analysis of the Nurses’ Health Study II (NHS2) cohort revealed that women with a history of hypertensive disorders of pregnancy (HDP) who are also overweight or obese have a significantly increased risk of developing chronic hypertension (HTN) later in life.1 HDP includes pre-eclampsia and gestational HTN: obstetric complications increasing risk of maternal mortality.2 In the US, pre-eclampsia and gestational HTN affect 3% and 5-10% of pregnancies, respectively.2 Furthermore, HDP increases risk for chronic HTN. Conservative figures estimate that…