About the worst thing you can do to a human body is go on the Atkins diet.
Why don't you elaborate? I've been doing low carb (60-90 grams/day) for two months and I've gone from 230 to 210 lbs.
Blood pressure is down, Cholesterol looks good, Glucose is good. Refined sugars, vegetarian diets, transfats and flour are killing us and making us fat. You would rather that we eat like this:
http://www.dpi.qld.gov.au/beef/3445.html