Buzz
Recently, five individuals shared with me their plans to 'give keto a try'—the latest conversation inspired by glowing reviews of a mutual friend who has been thriving on the ketogenic diet and achieving impressive results. You’ve likely heard whispers about keto, but what exactly is it? And does it live up to the hype?
First, let’s dive into the buzz surrounding the ketogenic diet. Keto is a diet that focuses on very low carbohydrates, moderate protein, and high fat intake. Those following keto often indulge in foods like thick slices of bacon, heaps of avocados, and generous amounts of heavy cream. The enthusiasm for this diet is evident, as seen in this Reddit comment:
Impressive. And here’s another example:
Low-carb diets have long been popular for weight loss, but keto adds a unique twist by prioritizing a high intake of fats. I consulted Leigh Peele, a NASM-certified personal trainer and expert in weight loss, metabolism, and nutrition, who also authored Starve Mode. She explained that the traditional definition of keto involves a 4:1 ratio of fats to carbohydrates or protein. This means for every gram of protein or carbs consumed, four grams of fat are eaten (hence the emphasis on avocados and heavy cream). However, strict adherence to this ratio isn’t mandatory as long as carb intake remains low and protein is kept at a moderate level to maintain a ketogenic state.
Allow me to clarify.
How Keto Differs from a Standard Low-Carb Diet
Keto’s standout feature compared to typical low-carb diets is that, after consistently avoiding bread, pasta, donuts, and other carb sources, your body enters ketosis (usually within a few days to a week). Ketosis occurs when your body starts breaking down fat, releasing a significant amount of molecules known as ketones into your bloodstream. These ketones then become your body’s main energy source, as the usual preference for carbs is drastically reduced.
So, how minimal must your carb intake be to achieve ketosis? Generally, it’s fewer than 50 grams of net carbs daily—equivalent to less than a standard deli bagel. This assumes you avoid any “hidden” carbs from starchy vegetables or sugary sauces. However, the exact carb limit for ketosis varies by individual, ranging from as low as 20 grams to as high as 100 grams. The most reliable way to confirm ketosis is through testing methods, though each method has its accuracy limitations. Beginners often start with urine test strips.
Is Ketosis Effective?
The long-term effects of keto on weight loss remain unclear. Historically, the diet has been used as a medical treatment to reduce seizures in children with epilepsy who don’t respond to medication, showing some success. Additionally, evidence suggests it may improve blood sugar control for individuals with type 2 diabetes, though Peele emphasizes it’s not a guaranteed solution for blood sugar issues.
While anecdotal evidence and short-term success stories highlight weight loss benefits from cutting carbs drastically, it’s not solely due to eliminating carbs entirely. A review in the American Journal of Clinical Nutrition found no proof that carbs—or their absence—are the sole factor determining your dream physique. In fact, much about the diet’s mechanisms, including keto, remains poorly understood.
From an energy balance perspective, keto works because, as SciBabe (Yvette d’Entremont) explained in a response to a commenter, it inherently restricts calories by limiting an entire food group. This eliminates many high-calorie options like donuts, cheeseburgers, pizza, and indulgent snacks. Additionally, consuming high-fat foods such as a well-marbled rib-eye or a whole avocado can keep you feeling full for extended periods.
Keto also delivers rapid results, unlike slower methods like eating vegetables and adequate protein. Some individuals lose 10-20 pounds within a week, which can be motivating initially. However, this isn’t magic—it’s a result of altered eating habits, dietary choices, and the initial loss of water weight due to reduced carb intake.
Thinking About Trying Keto...
Ultimately, keto is a highly effective diet, provided you can maintain it. This is the universal disclaimer for any diet: they all work if you stick to them consistently. If you’re considering starting keto, keep in mind that there’s no room for cheat days like pausing to devour a pizza and resuming keto later. You’re either in ketosis or not. Otherwise, you’re just following an extremely low-carb diet, which is perfectly fine if that’s your goal.
Keto is generally safe for most healthy individuals, but there are important considerations. One issue is that traditional keto can lead to protein deficiency due to its high-fat, low-protein focus. Peele suggests, “A more balanced keto approach, rather than the strict 4:1 ratio, can help include adequate protein. Additionally, taking vitamins and minerals can address potential deficiencies, similar to how vegans often need supplements.”
Peele also cautions that individuals with high-fat food intolerances, gallbladder removal, a history of gallstones, diabetes management issues, or other medical conditions should consult a doctor before starting keto.
Jumping into keto abruptly can be challenging. Some people may experience side effects, including the aptly named “keto flu”—symptoms like headaches and fatigue as your body adjusts to carb reduction. Once in ketosis, keep mints nearby, as you might notice a distinct change in breath odor. Also, expect potential changes in your bowel movements.
In the end, keto isn’t a magical solution. It’s a dietary approach that demands lifestyle adjustments and consistent commitment to achieve results. As Peele notes, it’s not the ultimate diet solution. If you or someone you know has succeeded with keto, that’s fantastic, but remember that individual circumstances and lifestyle play a significant role in its effectiveness, which may vary for others.
