Does the ketogenic diet work for weight loss?

The ketogenic diet can help with short-term weight loss, but official sources don't present it as a clearly superior long-term option compared to less restrictive plans. Furthermore, it's not suitable for everyone.

What is the ketogenic diet?

The ketogenic diet is a very low-carbohydrate pattern that causes the body to use fat instead of glucose and produce ketones as an alternative source of energy.

MedlinePlus also makes it clear that ketosis from a keto diet is not the same as ketoacidosis, a medical emergency primarily related to diabetes.

Why is it used for weight loss?

The American Heart Association explains that very low-carbohydrate diets are frequently used for weight loss and that studies of up to six months have shown improvements in weight and glucose levels.

A tightly controlled NIH trial found weight loss with both a low-fat and a low-carbohydrate diet, although only the former achieved a significant reduction in body fat in that study.

Does it work just as well in the long run?

When the question is about the long term, the message changes, because the American Heart Association indicates that after one year most improvements no longer differ from less restrictive diets.

The same entity adds that keto diets are generally no more effective for long-term weight loss than less restrictive plans and can also be difficult to maintain.

What do the current guidelines say?

The current Dietary Guidelines focus on whole, nutritious foods within an overall eating pattern, and the physical activity guidance complements them within the same public health framework.

That approach contrasts with the keto diet, which, according to the American Heart Association, restricts fruits, grains, and legumes, which can reduce fiber and leave more room for saturated fats.

What precautions should be reviewed?

For weight control, public recommendations are not limited to food, which is why they also fit with what is known about exercise and maintaining a healthy weight.

MedlinePlus warns that a keto diet may not be suitable for people with certain conditions and advises discussing it with a professional before starting it.

The NIDDK adds a useful idea for interpreting these diets without making easy promises, as it suggests thinking less about going on a diet and more about an eating pattern that can be maintained long-term.

This content is for informational purposes only and is not a substitute for medical advice. Before starting or changing any treatment, consult a healthcare professional.