There’s the issue of varying health claims for keto and other low carb diets.
“The ketogenic diet is designed to be a short-term diet, and there are a number of studies and trials demonstrating its effectiveness,” said chiropractor Josh Axe, a spokesperson for the Vitamin Shoppe, in statement.
“When done correctly, it can be a great tool used to treat and prevent several chronic conditions while also supporting overall health,” said Axe, who is the author of “The Keto Diet: Your 30-day Plan to Lose Weight, Balance Hormones and Reverse Disease.”
An Atkins spokesperson pointed to a two-year study by a health group selling ketosis diet interventionsand told CNN in a statement that “today’s science” shows “people can improve health markers pertaining to weight loss, cardiovascular disease and metabolic syndrome” when they control carbs.
Not exactly accurate, according to Gardner and Katz.”There’s very little research, and to the best of my knowledge, all of it is linked to a company marketing the keto diet,” Katz said.
“The bottom line is that despite its current popularity, we have very few studies that can support or refute its impact on health,” Gardner said.
The National Lipid Association Nutrition and Lifestyle Task Force reviewed all the available evidence in 2019 and found low and very-low carb diets “are not superior to other dietary approaches for weight loss,” and in some cases even raised cholesterol levels.
In addition, they found “three separate observational studies, including a large prospective cohort study with long-term follow-up,” showed an association between very low-carb diets and “all-cause mortality.
“So far, at least, it appears science has found the benefits of low-carb diets are fleeting.”What the early studies have shown is that there are early benefits in terms of weight loss and glucose control,” Gardner said.
“But in the few studies that have gone on for 12 months, the benefit in comparison to other diet approaches diminishes and is no longer statistically significant.”Which is why nutritionists fail to see the benefit of subjecting your body to the stresses of a low-carb diet just to lose a bit of weight, gain it back, and then start all over again.
“To achieve and maintain a healthy body weight, or optimize diabetes or heart disease risk factors, we should not be focusing on a ‘diet’, ” said Alice Lichtenstein, director and senior scientist at Tuft’s University’s Cardiovascular Nutrition Laboratory.
“We should be focusing on dietary patterns, making changes in current practices that can be sustained lifelong.”
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