The Atkins (low-carb) diet is widely condemned by lots of reporters on nutrition, health or medicine. One of the most-often-heard objections is that the diet will raise your triglycerides and blood cholesterol. However, there is a lot of reason to believe that this simply is not true, and in fact, the reverse is true--when you start losing weight, your triglycerides and cholesterol will *improve*.
I've been on the Atkins diet for about 4 months. I've had my blood tested twice and my lipid profile now is better than it was before I started--and I was taking meds for elevated cholesterol and triglycerides.
If it were just me, that would not have any significance. However, a few research studies have been done recently, and they've also found an improvement in the lipid profile of people following those diets. There was a report a few weeks ago, coming out of the annual meeting of the American Heart Association, but back in June or July there was a much more significant study that found no ill-effects at all from the diet. I checked with my own internist before I started on the Atkins diet, and he had no objections at all--and I know he keeps up with the research, and is a conservative guy.
So, if you have been contemplating this diet, and are otherwise in reasonably good health (e.g. no kidney problems), you can probably do it safely.