Harvard researchers have found a link between low-carb diets and a decrease of endothelial or vascular progenitor cells (EPC) production in mice.  Low EPC counts in humans have been linked to atherosclerosis, or arterial plaque buildup, rheumatoid arthritis and diabetes mellitus.

EPC are critical for the natural function of the epithelium, the interior lining of the entire circulatory system, from the heart to the smallest capillary.

Although a low-carb regime can help you lose a few pounds quick, it should not be a long-term weight management strategy, if used at all.  Reasonable portions, a healthy balanced diet and exercise are still the key to looking great, feeling great and staying healthy.