Atkins is just a lightweight version of a zero-carb diet, which is what the Inuit ate for 5000+ years. It involved basically no plant matter, at all.
Atkins is a gay marketing ploy but you don't need to buy any special food from anybody to eat zero-carb.
There used to be a pretty good wiki page about Stefansson and the Inuit diet, but in the last couple years it was wiped out–first separated into several different pages, and now most of those pages are removed totally.
Consider the following:
11 months of the year, the Inuit ate nothing but meat–because they were living on the edge of the pack ice, and could only eat animals they hunted from the ocean.
Only ~2 weeks each year did they eat any plants at all, and then even still they ate mostly meat–because the migrating elk were eating all the plants they could find.
And they lived this way for 5000+ years… If eating only meat was bad for you, there wouldn't be any Inuit around today.
Eating vegetarian/vegan diets has been a fad for thousands of years, but there is no sustained culture that ever did it unless meat was temporarily not available. Some people like to claim "it's perfectly healthy" (the same people that think that soy milk is healthy) but there is no long-term study that approaches the 5000-year history of the Inuit. The only proof that eating vegetarian could be healthy is from very modern times; all the people attempting it before then were malnourished.
Also we note–in a zero-carb diet, eating low-fat meat is bad for you. And all fish is low fat, so it's bad for you, for that reason alone.
All the meat you eat should be at least 25% fat, and 1/3 fat is better.
(—and what do "they" tell you now? They are telling you to eat fish instead of 'bad' fatty red meat. The one kind of meat that is most likely to harm you, they are trying to promote the consumption of—)
The Inuit diet was generally at least 1/4 fat, and often was as much as 1/2 fat.
The Inuit ate fish, but only if they had whale or other fat to dip it in right before eating it.
Eating plants instead of meat now is becoming a social doctrine–there is no scientific basis in it. It is propaganda.
When you were in school, the health textbooks always said that you couldn't be healthy without eating plants (you'll get scurvy like Henry VIII!).
What killed Henry VIII is very debatable, since people eating zero-carb tend to LOSE weight, not gain it. The tradtional Inuit diet had a HUGE fat intake. The Inuit tend to be barrel-chested, but they were not usually obese.
The textbooks always mentioned vegetarianism, and many even mentioned veganism–but they probably never even mentioned carnivorism or the Inuit.
The ONE 'extreme' diet with VERY-long-proof that it was healthy, they left out totally.
Why do you think they would do that?