Another mineral you may want to supplement is potassium. While there is no concrete evidence that a dramatic potassium loss occurs on a low-carb regimen, Sondike says to ensure against problems he recommends patients use Morton's Light Salt -- a potassium chloride product that he says can add back any of this important mineral that's lost. Eating a few almonds is also a good way to supplement this mineral without adding carbs to your diet.
As low-carb dietitian Franziska Spritzler, RD, CDE, who’s based in Orange County, California, points out, when you cut back on carbs, blood sugar and insulin levels generally go down, which can be a good thing for some people. “Carbs are broken down into glucose, which raises your blood sugar and prompts your pancreas to produce insulin to drive sugar into your cells,” says Spritzler. “When you’re overweight or obese, your blood sugar goes up and your pancreas sends out insulin, but your cells may not be responsive, leading your pancreas to overproduce insulin,” she says. High insulin increases hunger and prompts fat storage, she explains.
Fruit: While berries like blueberries, raspberries and strawberries are fine in small to moderate amounts, be careful with other fruit. They are fairly high in carbs and sugar, which can raise blood sugar, may slow down weight loss and can possibly worsen metabolic issues. Consider it nature’s candy: fine for a special treat, but probably not something to consume daily on a low-carb diet. Learn more
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You probably hear the most about low-carb eating for weight loss, but for some people, the approach could also help optimize their health, says Schmidt. “Research shows that women who are obese or have metabolic problems [may] do better hormonally on lower carbs,” says Schmidt, pointing out that other outcomes of the diet can include better sleep, mental clarity, and increased satiety. (1)
As for if you’re dealing with health issues, you really have to defer to your doctor. For instance, if you have kidney disease, you also want to talk to your doctor about appropriate protein intake. If you have heart disease, you can still go low carb, but you may be better off opting for monounsaturated fats (avocados, nuts, and olive oil) over saturated fats (butter and red meat). Everyone’s cholesterol levels respond differently on a low-carb diet, so if yours are going up, switch to unsaturated sources of fats, Spritzler recommends. “In general, this is a diet most people can do. If you have a chronic condition, work with a doctor who understands low-carbohydrate diets to monitor you,” she adds.
There is extensive evidence for the benefit of the Mediterranean style low carb diet, including cutting your risk of heart disease and diabetes. It has even been found to reduce risk the risk of breast cancer, compared with those on a low-fat diet. Consuming extra virgin olive oil (the fresh squeezed juice of olives) seems to be particularly beneficial when it comes to cancer, perhaps because it contains compounds such as polyphenols which are known to be anti-inflammatory.
That said, there isn’t an agreement that a low-carb diet is superior to any other kind of diet or that it’s healthier long term. A review in the December 2015 issue of Diabetes Therapy that looked at the diet among those with diabetes noted that when it comes to weight loss, a low-carb diet performs no better than other higher-carb diets; and that it doesn’t produce better glycemic control, either. (5) Another report in Diabetes Care also found that over one year, those on a low-carb diet lost weight faster than those on a low-fat one, but after a year, weight loss and A1C levels (an average of blood glucose over about three months) were remarkably similar. (6)