The Atkins Diet was the original “bacon, butter, and brie diet," and who wouldn't want to believe that? Some years later, vegetables and a more balanced approach were adopted.
The Ketogenic Diet is also very low-carb, high-fat eating for weight loss, but there is a difference. On the Atkins diet, your carb intake is gradually increased. On the keto diet, the objective is to keep your carb intake very low, putting the body into a metabolic state called ketosis.
According to the Mayo Clinic, “ketosis occurs when you don't have enough sugar (glucose) for energy, so your body breaks down stored fat, causing ketones to build up in your body.”
Mayo’s verdict: "...the high-fat content — and especially the high level of unhealthy saturated fat — combined with limits on nutrient-rich fruits, veggies, and grains, is a concern for long-term heart health.”