Can Switching to a Keto Diet Improve Your Health?
Can Switching to a Keto Diet Improve Your Health?
What keto actually is, what research does and doesn't support, and a keto-friendly soup recipe to try.
What Is a Keto Diet?
A ketogenic, or keto, diet is a high-fat, moderate-protein, very-low-carbohydrate eating pattern. Cutting carbohydrates this drastically pushes the body to shift from burning glucose for fuel to burning fat instead, producing molecules called ketones in the process — a metabolic state known as ketosis. The body normally relies on glucose, broken down from dietary carbohydrates, as its primary energy source. When that supply is restricted enough, the liver starts converting stored and dietary fat into ketones, which most tissues, including the brain, can use as an alternative fuel.
Because most food groups — dairy, meat, vegetables — already contain some carbohydrates, hitting these ratios means cutting out foods that are carbohydrate-heavy: potatoes and other tubers, grains, cereals, sugar, sweets, legumes, and beans. That rules out a typical breakfast cereal, smoothie, pizza, burger, or fruit-based dessert in their usual form.
The ketogenic diet was originally developed in the early 1920s as a clinical treatment for epilepsy, decades before it became a popular weight-loss approach.
The diet's roots trace back to 1921, when it was developed for therapeutic use, specifically to help manage seizures in people with epilepsy whose symptoms weren't controlled by available medication at the time. It's still used in some clinical settings today, under close supervision from neurologists and dietitians. The diet most people associate with "keto" today took a different path into the mainstream, gaining traction as a weight-loss approach starting with Dr. Robert Atkins in the early 1970s, and more recently becoming widely popular thanks to celebrity endorsements and social media.
What Does Research Say Beyond Weight Loss?
Weight loss on a keto diet is well documented — any diet this restrictive in carbohydrates tends to reduce calorie intake and shift the body's fuel source, and that combination reliably leads to weight loss for most people who stick with it. Part of the effect also comes from fat and protein being more satiating than carbohydrates for many people, which can naturally reduce overall food intake without the deliberate calorie-counting required by other diets.
Beyond weight loss, keto is an active area of nutrition and metabolic research, including interest in blood sugar control and insulin sensitivity in people with type 2 diabetes. Findings here are promising in some studies but not uniform, and a keto diet is not a replacement for diabetes medication or medical management. Other areas sometimes associated with keto online — including claims about cancer, Alzheimer's, Parkinson's, and PCOS — are either still too early-stage and inconclusive in human research, or, in the case of certain cancer claims, more complicated and in some recent studies even concerning, than the popular "starve the disease" framing suggests. We're intentionally not making specific claims in those areas here, since the actual research doesn't support confident statements either way.
If you have diabetes, high blood pressure, high cholesterol, a neurological condition, PCOS, a history of cancer, or any other medical condition, talk to your doctor before starting keto, and never stop or reduce a prescribed medication based on a diet change without medical guidance. Many people on keto report feeling more energetic with better mental focus once their body adapts, but individual experiences vary widely, and the best diet for you is ultimately the one a doctor or dietitian helps you tailor to your own health situation.
What You Can (and Can't) Eat
Foods generally allowed freely on a keto diet include:
Foods to avoid or sharply limit:
Before You Try It
People with kidney disease, gallbladder issues, a history of disordered eating, or who are pregnant or breastfeeding should talk to a doctor before starting keto. The same goes for anyone taking medication for diabetes, blood pressure, or seizures — never adjust a prescribed medication on your own based on a diet change.
It's also common to experience what's sometimes called the "keto flu" in the first week or two — fatigue, headache, irritability, or brain fog as the body adapts to burning fat for fuel instead of carbohydrates. Staying well hydrated and replacing electrolytes like sodium and potassium during this adjustment period helps most people feel better faster.
Sustainability is also worth thinking about honestly before starting. Keto is one of the more restrictive common diets, and long-term adherence is genuinely difficult for a lot of people. A diet that works on paper but that you can't realistically stick with isn't likely to deliver the benefits you're hoping for.
Easing Into It
- Clean out the obvious carb-heavy staples first. Bread, rice, pasta, and sugary snacks are the easiest things to overdo by habit, so having fewer of them on hand removes a lot of the daily decision-making.
- Plan meals around protein and vegetables, then add fat. Building a plate around a protein source and non-starchy vegetables, then adding healthy fats like olive oil, butter, or avocado, tends to be easier than trying to hit exact percentages from the start.
- Stay ahead of electrolytes. Cutting carbs also flushes out water and sodium, which is part of why the early "keto flu" symptoms happen. Adding a bit more salt to food and including potassium-rich vegetables can help.
- Give it real time before judging results. It typically takes a few days to a couple of weeks for the body to fully adapt to using fat and ketones for fuel, so early fatigue or low energy doesn't necessarily reflect how you'll feel once adapted.
A Keto-Friendly Soup Recipe
A hot, satisfying soup is one of the easier ways to stay full on keto while getting in more vegetables, and it's flexible enough to make smooth and creamy or chunky depending on your preference.
Ingredients
- 2 tbsp. butter
- 4 cloves garlic, minced
- 3 celery stalks, chopped
- 500 ml chicken broth or stock
- 1 tsp. parsley
- 1 tsp. thyme
- 200 g cooked, shredded chicken
- 100 g cheese
- 2 tbsp. cream
- Salt and pepper, to taste
Instructions
- Melt butter in a soup pot, then add garlic and celery. Sauté over medium heat until fragrant.
- Add chicken broth, parsley, and thyme. Simmer for 10-15 minutes to blend the flavors.
- Add the chicken, and once heated through, stir in cheese and cream until the cheese melts.
- Season with salt and pepper before serving.
If you miss the crunch of croutons, try sautéing or toasting some almonds and sprinkling them on top instead.
