In the first week, many people report headaches, mental fogginess, dizziness, and aggravation. Most of the time, this is the result of your electrolytes being flushed out, as ketosis has a diuretic effect. Make sure you drink plenty of water and keep your sodium intake up.6One of the fathers of keto, Dr. Phinney, shows that electrolyte levels (especially sodium) can become unbalanced with low carb intake.

“The cleaner, the better when it comes to the keto diet,” says Jadin. Focus on “whole” and “unprocessed.” Also, strive for a mix of saturated and unsaturated fats for balance. Note: Tipping the scale toward too much protein is a common pitfall many people make on the keto diet. Mind your protein intake, since too much can kick you out of ketosis, says Jadin.


Sleep enough – for most people at least seven hours per night on average – and keep stress under control. Sleep deprivation and stress hormones raise blood sugar levels, slowing ketosis and weight loss a bit. Plus they might make it harder to stick to a keto diet, and resist temptations. So while handling sleep and stress will not get you into ketosis on it’s own, it’s still worth thinking about.
Health Impact News has published many articles about the low-carb high-fat ketogenic diet, and its favorable influences on several diseases or dysfunctional health conditions. The ketogenic diet was originally developed at Johns Hopkins Hospital in the 1920s to stop seizures in children with epilepsy, when pharmaceutical drugs did not work. More recently, the ketogenic diet has been used successfully for neurological disorders such as Alzheimer's disease. Recently, there have been efforts by some researchers and medical practitioners to explore the potential of ameliorating schizophrenia, a major brain disorder that affects one out of a hundred, with the aid of the ketogenic diet.
A lot of people on the keto diet tend to go absolutely overboard with the unhealthy food that they pack into their plan. Sure a bunch of cheese, mayonnaise and bacon will fit into a seventy-five percent fat allowance, however, for your health these foods are not always the best option. Your day to day seventy-five percent fat allowance is meant to be used for healthy sources of fat such as such avocados, coconut oil, whole eggs, nuts and fats found in unprocessed meats such as beef, salmon, chicken thighs, ground pork or turkey.
You can have a completely smooth transition into ketosis, or…not. While your body is adapting to using ketones as your new fuel source, you may experience a range of uncomfortable short-term symptoms. These symptoms are referred to as “the keto flu.” Low-sodium levels are often to blame for symptoms keto flu, since the kidneys secrete more sodium when you’re in ketosis, says Volek. A few side effects:

The day before admission to hospital, the proportion of carbohydrate in the diet may be decreased and the patient begins fasting after his or her evening meal.[19] On admission, only calorie- and caffeine-free fluids[37] are allowed until dinner, which consists of "eggnog"[Note 8] restricted to one-third of the typical calories for a meal. The following breakfast and lunch are similar, and on the second day, the "eggnog" dinner is increased to two-thirds of a typical meal's caloric content. By the third day, dinner contains the full calorie quota and is a standard ketogenic meal (not "eggnog"). After a ketogenic breakfast on the fourth day, the patient is discharged. Where possible, the patient's current medicines are changed to carbohydrate-free formulations.[19]


The ketogenic or “keto” diet is a low-carbohydrate, fat-rich eating plan that has been used for centuries to treat specific medical conditions. In the 19th century, the ketogenic diet was commonly used to help control diabetes. In 1920 it was introduced as an effective treatment for epilepsy in children in whom medication was ineffective. The ketogenic diet has also been tested and used in closely monitored settings for cancer, diabetes, polycystic ovary syndrome, and Alzheimer’s disease.
An extreme form of low-carbohydrate diet – the ketogenic diet – is established as a medical diet for treating epilepsy.[14] Through celebrity endorsement it has become a popular weight-loss fad diet, but there is no evidence of any distinctive benefit for this purpose, and it had a number of side effects.[14] The British Dietetic Association named it one of the "top 5 worst celeb diets to avoid in 2018".[14]
The ketogenic diet is used to treat drug-resistant childhood epilepsy. It has become a fad diet for people attempting to lose weight.[39] Dieters trying this often do not achieve true ketosis as this requires extreme carbohydrate restriction, and maintaining a ketogenic diet is difficult.[39][11] Some diet advocates make misleading claims that the ketogenic diet can treat or prevent cancer.[14]

The only issue with keto, is really that I’m afraid that it might be hard to up my calories to a maintenance weight now that I’ve gotten a taste preference for the rich assortment of foods with no carbs in them. I’m satisfied with less calories than I will need after my excess fat is burned off… but , maybe I bet my body will send more hunger signs once there isn’t anymore body fat in the cupboard to use instead of what goes down my throat.


Because the weight-loss method employed in this study consisted of a reduction of energy intake to less than 800 kcal/day in the first stage of the treatment, it could be expected that there would be an increase in food craving in response to metabolic need expressed as hunger. By contrast, in this study, a reduction in food craving was observed despite the high energy restriction. These results agreed with previous studies that also concluded a reduced food craving after an energy restriction diet [43]. In fact, it has been demonstrated that energy restriction via a liquid formula-based total meal replacement very low-calorie diet suppresses food cravings compared to energy restriction via a typical food-based low-calorie diet [44]. This decrease in food craving associated with energy restriction was recently demonstrated to be consistent with increased executive control over ingestion and food cravings, by examining human brain functional MRI food-cue reactivity (fMRI-FCR) [45]. As in that study, we observed a significant reduction of overall food cravings and cravings for sweet food, high-fat food, starchy food, and fast food as measured by the food craving inventory questionnaire [45] after the VLCK diet. Relevantly, when we focused on specific subscales of the food-craving questionnaire, we observed that high levels of ketone bodies correlated with low scores of hunger feelings and intentions to eat. These results are in line with the effect of ketosis on food control previously reported [14,46,47]. However, contrary to a previous study, which demonstrates a lowering of plasma ghrelin levels induced by ketone ester drinks [48], in the current work, the circulating levels of ghrelin were not modified despite the increase in blood ketone levels (data not shown). Additionally, the VLCK diet-PNK method was able to maintain the reduction in hunger during the intervention, even at the no ketosis phase, in contrast with a previous work that evidenced an increase in hunger during the refeeding phase [49].
In 1972, Robert Atkins published Dr. Atkins Diet Revolution, which advocated the low-carbohydrate diet he had successfully used in treating patients in the 1960s (having developed the diet from a 1963 article published in JAMA).[56] The book met with some success, but, was widely criticized by the mainstream medical community as being dangerous and misleading, thereby limiting its appeal at the time.[57]
Commonly known as “keto”, a ketogenic diet is a diet typically characterized by a 4:1 ratio of dietary fat to protein and carbohydrate and was originally used in the treatment of childhood epilepsy. It has been theorized that keto diets facilitate greater fat loss in humans as an absence of dietary carbohydrate forces the body to oxidize fat as its primary energy source.
That's fine since no diet is right for everyone. Keto works well for a lot of people, at least in the short term, but what really matters is a plan that you can maintain long term and helps you sustain that weight loss. And that will differ for every person. In the meantime, use these 10 strategies as a first step to bust through your weight loss plateau.

Some negative side effects of a long-term ketogenic diet have been suggested, including increased risk of kidney stones and osteoporosis, and increased blood levels of uric acid (a risk factor for gout). Possible nutrient deficiencies may arise if a variety of recommended foods on the ketogenic diet are not included. It is important to not solely focus on eating high-fat foods, but to include a daily variety of the allowed meats, fish, vegetables, fruits, nuts, and seeds to ensure adequate intakes of fiber, B vitamins, and minerals (iron, magnesium, zinc)—nutrients typically found in foods like whole grains that are restricted from the diet. Because whole food groups are excluded, assistance from a registered dietitian may be beneficial in creating a ketogenic diet that minimizes nutrient deficiencies.


“At the Duke Diet and Fitness Center, our residential clients can choose from three levels of carb intake that happen to be aligned with the Diet Doctor’s levels of liberal low-carb, moderate low-carb and keto low-carb. The alignment is not by chance, however. It’s because we have separately come to the same conclusions after carefully and objectively reviewing the evidence and gathering information from experienced clinicians and patients. The Diet Doctor website is very unique in that regard, and a great resource for our patients!”
The weight-loss program has five steps and adheres to the most recent guidelines of the 2015 EFSA on total carbohydrate intake [22]. The first three steps consist of a VLCK diet (600–800 kcal/day), low in carbohydrates (<50 g daily from vegetables), and lipids (only 10 g of olive oil per day). The amount of high biological-value proteins ranged between 0.8 and 1.2 g per each kg of ideal body weight to ensure that patients were meeting their minimum body requirements and to prevent the loss of lean mass. In step 1, the patients ate high-biological-value protein preparations five times a day and vegetables with low glycemic indexes. In step 2, one of the protein servings was substituted with a natural protein (e.g., meat or fish) either at lunch or at dinner. In step 3, a second serving of low-fat natural protein was substituted for the second serving of biological protein preparation. Throughout these ketogenic phases, supplements of vitamins and minerals, such as K, Na, Mg, Ca, and omega-3 fatty acids, were provided in accordance with international recommendations [23]. These three steps were maintained until the patient lost the target amount of weight, ideally 80%. Hence, the ketogenic steps were variable in time depending on the individual and the weight-loss target. The total ketosis state lasted for 60–90 days only.
PATIENTS AND METHODS: Randomized cross-over trial with placebo. The study had no. 2 dietary treatment (DT), conducted in two arms: (1) VLCKD1 in which 50% of protein intake is replaced with synthetic amino acids; (2) VLCKD2 with placebo. The VLCKDs (<800 kcal day-1) were different in term of protein content and quality each arm lasted three weeks (wks). Between the two arms a 3-wks washout period was performed to avoid additive effects on DT to follow. At the baseline, at start and end of each arm, all the subjects were evaluated for their health and nutritional status, by anthropometric analysis, body composition (Dual X-ray Absorptiometry (DXA), Bioimpedentiometry, biochemical evaluation, and Peroxisome Proliferator-Activated Receptor γ (PPAR) γ expression by transcriptomic analysis.
“For five years now, I’ve been changing my life and the life of my patients in a rural area of Delaware using the LCHF diet with intermittent fasting. My patients have been achieving not only their weight loss goals, but improving their medical conditions associated with obesity. It is very satisfying to explain the science behind the diet and see their faces light up at the possibility of finally improving their health and reducing their medications and medical costs. Diet Doctor, all this time, has been a valued resource with easy to navigate content and great science.”

The goal of the KD is to sufficiently deprive the body of CHO to achieve physiological or “nutritional ketosis,” a metabolic state which is characterized by blood ketone levels between 0.5 and 3.0 mmol/L (26). This “switch over” point, however, is not seamless and may take up to several weeks for individuals to become “keto adapted” (18). Supporting this idea is a significant amount evidence indicating that a “keto adapted” body has little reliance on glucose for CNS function (8,14,16) or as a source of energy for exercise (17,18,25,27).

Our highly processed and high fat with high carbs diets and sedentary ways are going to kill off many of our kids. A study just done says this generation will probably be less healthy and die earlier than their parents. I did Atkins years ago and did splendidly. I went back to my foolish habits and suffered. I’m on a ketogenic diet which has already reaped many benefits in this 65 year old body. Better mood, less joint pain, less fatigue, and more energy. Loving it.
“As a physician who developed type 1 diabetes in 1998 at the age of 38, I struggled to manage my blood sugar with conventional medical advice. I met Dr. Andreas Eenfeldt at a medical meeting in 2012 and have used Diet Doctor as an excellent source of information for both myself and my patients ever since. The low-carb diet resulted in a marked improvement in my blood sugar control and my entire outlook on life. I provide online coaching to people with diabetes who need individualized attention.”
Hi Sylvie, thanks for the positive review! To answer your question about spaghetti squash – it could quite frankly go either way. It has about 7g total carbs per serving (1 cup) and 5.5 net carbs which could be considered a bit high for keto but still on the moderate/low range compared to all the other starchy veggies out there. I would just be mindful of this and consume in moderation 🙂
7. Raygan, F., Bahmani, F., Kouchaki, E., Aghadavod, E., Sharifi, S., Akbari, E., . . . Asemi, Z. (2016). Comparative effects of carbohydrate versus fat restriction on metabolic profiles, biomarkers of inflammation and oxidative stress in overweight patients with Type 2 diabetic and coronary heart disease: A randomized clinical trial. PMID: 28607566
I’ve been trying this keto diet that my dr.and daughter recommended, it’s been close to a week. I’ve changed my food intake, no bad carbs that I know of, was a huge chip addict stopped all that with no cravings. I’m not seeing any results I’m getting discouraged and everything sounds so complicated watching this, measuring that, I don’t have a clue what I’m doing. just that I stopped bread,pasta,poratoes,rice all those kind of carbs.I’m drinking more water eating green vegetables and trying to increase my fat intake. I don’t feel motivated to exercise which probably doesn’t help and have 100-130 to lose. I need help I don’t understand or have the time create a lot of meals and measure my fat,protein and carb intake.
If you’re looking to get a jump start on your health and fitness goals this year, you may be thinking about trying the ketogenic diet. Maybe you’ve heard the phrase before — it’s a huge diet buzzword — but aren’t sure what it means. Here’s a primer: The ketogenic diet is an eating plan that drives your body into ketosis, a state where the body uses fat as a primary fuel source (instead of carbohydrates), says Stacey Mattinson, RDN, who is based in Austin, Texas.
“At the Norwood Surgery in the North of England we have been offering a low-carb option for our patients with type 2 diabetes since 2013. We feel this makes perfect sense in a condition which could be seen as one where sugar is acting as a ‘metabolic poison’, remembering that starchy carbs like bread rice or breakfast cereals digest down into surprising amounts of sugar, as predicted for us by the glycemic index.”

A lot of people take their macros as a “set in stone” type of thing. You shouldn’t worry about hitting the mark every single day to the dot. If you’re a few calories over some days, a few calories under on others – it’s fine. Everything will even itself out in the end. It’s all about a long term plan that can work for you, and not the other way around.


Thanks for this article. I just started a Keto diet so found it appropriate to my current lifestyle. Though I don’t believe your bottom line is strong enough since you simply stating that the diet is “hard to follow” and food is “notoriously unhealthy” without evidence going deeper into why those “notoriously unhealthy” foods are worse than keeping carbohydrate-heavy food that are addictive and give the body a quick sugar high for energy. I believe “hard to follow” is your opinion only, since acceptable Keto foods are found at all restaurants easily and also all grocery stores. All the foods you mention: “rich in very colorful fruits and vegetables, lean meats, fish, whole grains, nuts, seeds, olive oil, and lots of water” are all Keto-friendly. Many people have been on a Keto-diet for years. A healthy lifestyle is a healthy mindset change and making right choices – it’s not going to be easy.
Proponents of the ketogenic diet say the problem with a high-carbohydrate diet is that it induces high insulin levels and keeps the body burning sugar and carbs instead of fat. In contrast, on a low-carb diet, the body learns to burn fat preferentially. When this happens, acids known as ketones are released from fat into the body, while insulin levels go down. Ketosis can occur after several days on a low-carb diet.
Typically you want to stay away from any brands that use filler ingredients like maltodextrin and dextrose, or high glycemic sweeteners like maltitol. Many low-carb products that claim low net carbs usually use these sugar alcohols. Many candies that are “sugar-free” also use these sweeteners. Avoid them where possible. These specific sweeteners respond in our body in a similar way sugar does.
A short-lived increase in seizure frequency may occur during illness or if ketone levels fluctuate. The diet may be modified if seizure frequency remains high, or the child is losing weight.[19] Loss of seizure-control may come from unexpected sources. Even "sugar-free" food can contain carbohydrates such as maltodextrin, sorbitol, starch, and fructose. The sorbitol content of suntan lotion and other skincare products may be high enough for some to be absorbed through the skin and thus negate ketosis.[31]
“In 2010 I came face-to-face with the compelling, robust evidence for the effectiveness of the low-carb, high-fat diet to prevent and treat serious diseases like diabetes, obesity and heart disease. It contradicted everything I knew as a doctor and scientist about optimal nutrition. I have since aimed to change medical dogma and foster respectful dialogue on evidence-based nutrition, but at a brutal personal and professional cost, even though eventually vindicated. The Noakes Foundation, since 2012, has been promoting unbiased nutritional research into the effects of LCHF on all aspects of human health. The sugar-free train is bound for glory.”
Relevantly, a statistically significant decrease was also observed in the craving for specific nutrients from baseline to endpoint (Figure 2B). These modifications in FC-inventory were evidenced from the visit of reduced ketosis as compared with baseline. Whereas, the craving for simple sugars and trans fats was modified earlier than the other items, since maximum ketosis compared with baseline (Figure 2B).

Achieving optimal ketosis hinges on finding the right balance of macronutrients (or “macros” in keto-speak); these are the elements in your diet that account for the majority of your calories, a.k.a. energy—namely, fat, protein, and carbohydrates. By the way, it’s often “net grams” of carbohydrates that are counted toward your daily intake; “net” deducts the amount of fiber in a food from its carbohydrate total.

.. it can be heavy on red meat and other fatty, processed, and salty foods that are notoriously unhealthy. What is unhealthy about red meat. We should know that acrilamides, pyrroles in burnt meat (and veges) from BBQ and over-heated cooking inflames the colon. According to Clark H R, PhD ND an inflamed part allows easy entry for the cancer nucleus and cancer complex, to start and fuel a malignancy at that location.
“As a bariatric surgeon and as a researcher studying the liver for two decades, my research has shown that it is the toxicity of chronic excessive carbohydrate consumption that is the primary cause of obesity and obesity-related co-morbidities. As an obese doctor myself, I was able to lose 90 pounds once I recognized that I had a carbohydrate addiction and so eliminated carbohydrates from my diet. While I have performed more than 8,000 bariatric surgeries, I firmly believe that surgery is only a tool. Obesity and diabetes are not treated by surgery, but rather by the journey to become carbohydrate-free.”
Anticonvulsants suppress epileptic seizures, but they neither cure nor prevent the development of seizure susceptibility. The development of epilepsy (epileptogenesis) is a process that is poorly understood. A few anticonvulsants (valproate, levetiracetam and benzodiazepines) have shown antiepileptogenic properties in animal models of epileptogenesis. However, no anticonvulsant has ever achieved this in a clinical trial in humans. The ketogenic diet has been found to have antiepileptogenic properties in rats.[56]
Physicians of ancient Greece treated diseases, including epilepsy, by altering their patients' diet. An early treatise in the Hippocratic Corpus, On the Sacred Disease, covers the disease; it dates from c. 400 BC. Its author argued against the prevailing view that epilepsy was supernatural in origin and cure, and proposed that dietary therapy had a rational and physical basis.[Note 3] In the same collection, the author of Epidemics describes the case of a man whose epilepsy is cured as quickly as it had appeared, through complete abstinence of food and drink.[Note 4] The royal physician Erasistratus declared, "One inclining to epilepsy should be made to fast without mercy and be put on short rations."[Note 5] Galen believed an "attenuating diet"[Note 6] might afford a cure in mild cases and be helpful in others.[11]
So I have tried many things to loose weight and nothing worked, including this. This was a while ago. Then I decided I was not going to eat breakfast anymore, because in order to loose weight, you need to be a little bit hungry. So anyways, I have been doing intermittent fasting (eating at noon and dinner 6-8) and the first day was hard for me but I stuck to it with the help of some lemon water. The next 3 days became easier and easier. Today, I realized I was not at all hungry for dinner and was a little scared, because I didn’t want my metabolism to slow down (I’ve had problems in the past) so I googled up what this means. I saw that it was ketosis and was so excited. When I went to check the ketosis strips, it was actually working and I was so so happy. The fact that I was trying so hard with all of these fancy recipes and eating 3 meals a day frustrated me. I do not count my calories or anything else. I do some excercise for about 30 minutes everyday. For those who are struggling, please please please! Try intermittent fasting if the ketogenic diet isn’t working for you.
More importantly they measured markers of heart disease risk, including cholesterol ratios and triglycerides, blood pressure, carotid intima-media thickness (CIMT). The carotid arteries are the ones that run on both sides of the neck, where some feel to check for a pulse and determine if someone is dead. The inner walls of that artery are measured by ultrasound.
We’re going full on fats with breakfast, just like we did last week. This time we’ll double the amount of ketoproof coffee (or tea) we drink, meaning we double the amount of coconut oil, butter, and heavy cream. It should come to quite a lot of calories, and should definitely keep us full all the way to dinner. Remember to continue drinking water like a fiend to make sure you’re staying hydrated.
This article originally appeared in Personal Training Quarterly (PTQ)—a quarterly publication for NSCA Members designed specifically for the personal trainer. Discover easy-to-read, research-based articles that take your training knowledge further with Nutrition, Programming, and Personal Business Development columns in each quarterly, electronic issue. Read more articles from PTQ »
A computer program such as KetoCalculator may be used to help generate recipes.[47] The meals often have four components: heavy whipping cream, a protein-rich food (typically meat), a fruit or vegetable and a fat such as butter, vegetable oil, or mayonnaise. Only low-carbohydrate fruits and vegetables are allowed, which excludes bananas, potatoes, peas, and corn. Suitable fruits are divided into two groups based on the amount of carbohydrate they contain, and vegetables are similarly divided into two groups. Foods within each of these four groups may be freely substituted to allow for variation without needing to recalculate portion sizes. For example, cooked broccoli, Brussels sprouts, cauliflower, and green beans are all equivalent. Fresh, canned, or frozen foods are equivalent, but raw and cooked vegetables differ, and processed foods are an additional complication. Parents are required to be precise when measuring food quantities on an electronic scale accurate to 1 g. The child must eat the whole meal and cannot have extra portions; any snacks must be incorporated into the meal plan. A small amount of MCT oil may be used to help with constipation or to increase ketosis.[37]
WY conceived, designed, and coordinated the study; participated in data collection; performed statistical analysis; and drafted the manuscript. MF assisted with study design, performed data collection, and helped to draft the manuscript. AC analyzed the food records. MV assisted with study/intervention design and safety monitoring. EW participated in the conception and design of the study, and assisted with the statistical analysis. All authors read and approved the final manuscript.
This work was supported by grants from the Fondo de Investigacion Sanitaria, (PI14/01012 and PI17/01167) research projects and CIBERobn (CB06/003), from the Instituto de Salud Carlos III (ISCIII), Fondo Europeo de Desarrollo Regional (FEDER) Spanish. DGA is grateful to the Colombian Department of Science, Technology and Innovation—COLCIENCIAS as a recipient of their pre-doctoral scholarship to support his work. Ana B Crujeiras is funded by a research contract “Miguel Servet” (CP17/00088) from the ISCIII.

The weight-loss program has five steps and adheres to the most recent guidelines of the 2015 EFSA on total carbohydrate intake [22]. The first three steps consist of a VLCK diet (600–800 kcal/day), low in carbohydrates (<50 g daily from vegetables), and lipids (only 10 g of olive oil per day). The amount of high biological-value proteins ranged between 0.8 and 1.2 g per each kg of ideal body weight to ensure that patients were meeting their minimum body requirements and to prevent the loss of lean mass. In step 1, the patients ate high-biological-value protein preparations five times a day and vegetables with low glycemic indexes. In step 2, one of the protein servings was substituted with a natural protein (e.g., meat or fish) either at lunch or at dinner. In step 3, a second serving of low-fat natural protein was substituted for the second serving of biological protein preparation. Throughout these ketogenic phases, supplements of vitamins and minerals, such as K, Na, Mg, Ca, and omega-3 fatty acids, were provided in accordance with international recommendations [23]. These three steps were maintained until the patient lost the target amount of weight, ideally 80%. Hence, the ketogenic steps were variable in time depending on the individual and the weight-loss target. The total ketosis state lasted for 60–90 days only.


Another study compared the effects of three diets differing in macronutrient (carb, fat, protein) composition on energy expenditure during weight loss maintenance. Weight loss causes resting energy expenditure (metabolic rate) to go down, which predisposes to weight regain. Results of the study showed that the very low-carb (and highest protein) diet had the LEAST effect on reducing resting energy expenditure following weight loss.2

Physician assistants (PA) typically obtain medical histories, perform examinations and procedures, order treatments, diagnose diseases, prescribe medication, order and interpret diagnostic tests, refer patients to specialists as required, and first or second-assist in surgery. Their education includes a bachelor’s degree, extensive clinical training from an accredited PA program and they must obtain a license to practice as a physician assistant.
Thanks for all the info. Just found Endame Pasta at Hannafords. Two ounces (a hefty plateful) is just 9 net carbs. It’s absolutely delicious with a sauce made of mushrooms & shrimp sauteed in olive oil, a bit of butter and garlic and shredded cheese to top it off (hand shredded of course). I’d only had 6 grams of carbs today and decided to give it a try. Yum. So glad I did. Easy & quick supper.
Health experts think that the first law is relevant to why we get fat because they say to themselves and then to us, as the The New York Times did, “Those who consume more calories than they expend in energy will gain weight.” This is true. It has to be. To get fatter and heavier, we have to overeat. We have to consume more calories than we expend. That’s a given. But thermodynamics tells us nothing about why this happens, why we consume more calories than we expend. It only says that if we do, we will get heavier, and if we get heavier, then we did.
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