The carnivore diet is a fad diet that involves consuming only animal products such as meat, eggs, and dairy. It is also known as a zero-carb diet because it excludes all produce, as well as grains, legumes, nuts, and seeds. The carnivore diet is associated with pseudoscientific health claims and can lead to deficiencies of vitamins and dietary fiber, and increase the risk of chronic diseases. The lion diet is a highly restrictive form of the carnivore diet where only beef is eaten. The idea of an exclusive meat diet can be traced back to the 19th century, and it has gained popularity in recent years. However, no controlled studies support claims that the carnivore diet can help eliminate health issues, and it lacks beneficial nutrients, including fiber and plant compounds like antioxidants. It may be unsafe for some people, and it is extremely restrictive and likely unhealthy in the long term. Therefore, it is recommended to follow a well-rounded diet instead of the carnivore diet.