These scam diets were written to sell supplements, protein bars, and books (look it up, I’m not going to link to them here). They tell people everything they want to hear such as:
Saturated fat by itself probably is not problematic.
Butter is ok.
Saturated fat has a minimal effect on cancer or heart disease.
-Loren Cordain – advocate of the Paleolithic Diet
The Paleo Diet Worst of the Fitness Industry (contains murder and explicit language)
Eat Butter.
Scientists labeled Fat the Enemy.
Why they were wrong.
-TIME Magazine Cover June 23, 2014
Saturated Fat Is Good For You?! Dr John McDougall (video)
The Saturated Fat Studies: Buttering Up the Public (video)
The Saturated Fat Studies: Set Up to Fail (video)
Lipotoxicity: How Saturated Fat Raises Blood Sugar (video)
Eat liberally a combination of fat and protein in the form of poultry, fish, shellfish, eggs and red meat, as well as pure, natural fat in the form of butter, mayonnaise, olive oil, safflower, sunflower and other vegetable oils (preferably expeller-pressed or cold-pressed).
-Atkins.com – The Rules of Induction #2
Eat absolutely no fruit, bread, pasta, grains, starchy vegetables or dairy products other than cheese, cream or butter.
-Atkins.com – The Rules of Induction #4
(Fruit is healthy but cheese, cream and butter are not.)
At a minimum, take a good daily multivitamin with minerals, including potassium, magnesium and calcium, but without iron.
-Atkins.com – The Rules of Induction #13
(You should get adequate vitamins and minerals from food on a healthy diet. But if Atkins was a healthy diet they couldn’t sell their supplements, protein bars and shakes.)

Low-Carb Diets
Low-Carb Diets & Coronary Blood Flow (video)
Here is Where Low Carb Diets Ultimately Fail (video)
Carbohydrates Make You Fat? Dr John McDougall (video)
Low-carbohydrate diets and all-cause and cause-specific mortality: two cohort studies.
LOW CARB KETO DIET – Debunking 7 Misleading Statements (video)
Why You Should Say No to the Keto Diet
Scam Diets
Atkins Diet
The Atkins diet is classified as a fad diet.[2] There is only weak evidence supporting its effectiveness in helping achieve sustainable weight loss.[3][4]

Is the Atkins diet healthy/safe? What about other low-carb diets?
Dr Michael Greger Debunks The Paleo & Atkins Diet
Atkins Diet: Trouble Keeping It Up
Dr McDougall interviews Dr Atkins: High Carb vs Low Carb
Rival Diet Doc Leaks Atkins Death Report
Professor Debunks Atkins / Keto Diet (video)
Paleolithic Diet
Following the Paleo diet can lead to nutritional deficiencies such as those of vitamin D and calcium, which in turn could lead to compromised bone health.[1][19] There is also a risk of toxins from high fish consumption.[2]

The Problem with the Paleo Diet Argument (video)
The Paleo Diet is Not What you Think (video)
Weight Watchers
Weight Watchers now has over 200 zero point foods. The Weight Watchers Points Calculator shows that chicken and fish are zero point foods. So lets say I get about 50 points a day. This would mean I could eat about 6 hamburgers or 25 pieces of fudge in addition to unlimited chicken and fish.
The Weight Watchers point system was designed to sell Weight Watchers meals and sell a membership to their program. If people could actually maintain their weight loss then Weight Watchers would be out of business fast.
Oprah Winfrey promotes and owns weight watchers and has always been FAT! She is just another Robert Atkins.
See Weight Watchers Points Calculator: