Despite what the sugary beverage and processed snack food companies want us to believe, all calories are not created equal.

A new study from Harvard shows that individuals following a low-carbohydrate (20% of total calories) diet burn between 209 and 278 more calories per day than those on a high-carbohydrate (60% of total calories) diet. So the type of calories we eat really does matter.

The New York Times: How a low-carb diet might help you maintain a healthy weight

This isn’t the first study to investigate this topic, but it is likely the best.

The current study was a meticulously controlled, randomized trial, lasting 20 weeks. Even more impressive, the study group provided all the food for participants, over 100,000 meals and snacks costing $12 million for the entire study! This eliminated an important variable in nutrition studies — did the subjects actually comply with the diet — and shows the power of philanthropy and partnerships in supporting high-quality science.

After a run-in period where all subjects lost the same amount of weight, participants were randomized to one of three diets: 20% carbs, 40% carb, or 60% carbs, with the protein remaining fixed at 20%. Importantly, calories were adjusted to stabilize weight and halt further weight loss, thus making it much more likely that any observed difference in calorie expenditure was not from weight loss, but rather from the types of food consumed.

After five months, those on the low-carb diet increased their resting energy expenditure by over 200 calories per day, whereas the high-carb group initially decreased their resting energy expenditure, exposing a clear difference between the groups. In addition, those who had the highest baseline insulin levels saw an even more impressive 308-calorie increase on the low-carb diet, suggesting a subset that may benefit even more from carbohydrate restriction.

Why is this important? It shows why the conventional wisdom to eat less, move more and count your calories is not the best path to weight loss. Numerous studies show better weight loss with low-carb diets compared to low-fat diets, and now studies like this one help us understand why.

Our bodies are not simple calorimeters keeping track of how much we eat and how much we burn. Instead, we have intricate hormonal responses to the types of food we eat. It’s time to accept this and get rid of the outdated calories in-calories, calories-out model, thus allowing for more effective and sustainable long-term weight loss.

Originally Posted on the Diet Doctor Blog 

Is the Keto Diet Heart Healthy? 7 Reasons Why This Cardiologist Agrees

I am a board certified, card-carrying cardiologist, and I want my clients to eat more fat, more meat, more cheese, more eggs, more avocado, more, more, more.

For decades medical establishments have convinced us to eat low fat, higher carb diets. How has that worked for our health? Here’s a hint, we have record numbers of obesity, diabetes and dementia. Yet, as a cardiologist, that’s the party line I am supposed to support.

But I can’t. It’s just wrong, and I can’t support that line of thinking, not for a second.

Instead, I am a Low Carb Cardiologist. Here are the top Seven reasons why

1. Reducing Insulin is Essential to Health and Weight Loss.
   Insulin is a hormone naturally secreted by the pancreas to help regulate blood sugar levels. Everything we eat (except possibly for 100% fat meals) causes insulin to rise. That is normal physiology. The problem occurs when our bodies become resistant to the effects of insulin, thus requiring our pancreas to make more and more and more insulin.The problem? Insulin promotes fat storage, increase inflammation and oxidation, and can even help fuel the growth of cancer cells. Therefore, the healthiest approach is one which reduced the level of insulin to the lowest possible levels. As it happens, a Low-carb High-fat or ketogenic lifestyle (LCHF/Keto lifestyle) dramatically improves your body’s sensitivity to insulin, reduces the amount of insulin secreted, and it allows your body to naturally use your fat stores for what they are designed for: Break them down into energy! Once we see that we need to fight chronic elevations of insulin, it becomes obvious why a low-fat diet is harmful, and why a low carb diet is the true path to health.
   
2. Eating Fat Improves Your Cholesterol!
   Wait, what? Eating fat can improve my cholesterol? Sounds crazy, right? That goes against everything we have heard from the medical establishment. Notice I said “cholesterol.” I didn’t say the “bad” low density lipoprotein (LDL), I didn’t say the “good” high density lipoprotein (HDL), or any one specific type of cholesterol. We have over emphasized the solitary variable of LDL for too long. Total cholesterol to HDL ratio, Triglyceride to HDL ratio, lipoprotein size and density, insulin sensitivity, and other metabolic measures are more powerful predictors of cardiovascular health than just LDL.Once again, we see that all these markers improve with a Low Carb High Fat (LCHF) lifestyle. The medical establishment needs to realize that we are more complicated than one lab value. The key is to look at the whole picture, and this picture dramatically improves with a LCHF lifestyle.If you want to learn more about lipids and cholesterol, I recommend checking out my new dedicated cholesterol course: The Truth About Lipids.
3. Higher HDL is Associated with a Lower Risk of Heart Disease.
   HDL is your friend, but drugs are not. Observational evidence has consistently shown that higher HDL is associated with a lower risk of cardiovascular disease. However, our healthcare establishment does not prioritize HDL for one simple reason- Drugs that raise HDL don’t make you healthier. Trial after trial has failed to show any benefit from drugs that significantly increase HDL.Instead, it’s the HDL-raising lifestyle that provides the benefit, not artificially increasing it with drugs. What’s the best lifestyle to naturally raise HDL? You guessed it. LCHF/Keto lifestyle. Add in some resistance training and you have your friendly HDL climbing the way it was meant to…Naturally.
4. LCHF Leaves You Feeling Great, Leading to Healthier Decisions
   What kind of health decisions do you make when you are fatigued, achy, and find it difficult to concentrate? That’s a rhetorical question, I already know the answer. When things look glum and we don’t feel well, it’s far too easy to sit on the couch or reach for the chips and cookies. Compare those decisions to those you make when you are well rested, energetic, and seeing the world more clearly. For most people, the better you feel, the better decisions you make.Guess what? The majority of people who change to a LCHF lifestyle feel better! It may take a few days or weeks, but in general, they feel more in control of their health, more energetic, and they are able to make better health decisions. I admit this is difficult to prove in a scientific trial. That is why we all should become our own n=1 scientific trial. How do you feel and how are your health decisions after going to a LCHF lifestyle? What matters most is what works for you, not what works for hundreds of people who are kinda-sorta like you.
5. Keto helps you with fasting.
   Eating better helps you not eat. People who eat a high carb diet eat a lot, don’t they? They are always grazing and snacking. Our bodies go through the roller coaster of blood sugar and insulin spikes, making it a challenge to go 24, 18, or even 6 hours without eating. This creates a constant, unwavering supply of insulin in our blood stream.Why is this harmful? For one, it promotes fat storage and keeps us from using our fat as fuel. Secondly, chronically elevated insulin can predispose to heart disease, strokes, cancer, dementia and other devastating health conditions. When people change to Keto, however, they realize they do not need to eat nearly as much or as frequently. Avoiding the carbs and increasing the fats keeps us full longer, and our bodies quickly adapt to longer periods without eating. The result? We can use our fat stores for what they were designed- a source of fuel! It also allows our body to maintain lower insulin levels, and also allows our cells to take care of their health chores, referred to as Autophagy.If you’re interested in Fasting and want to make sure you’re doing it correctly, download my free Full Guide to Fasting.
6. LCHF Promotes Health Through Increased Autophagy.
   Autopha-What? In medicine we like using fancy words to make us look smart. Autophagy is a big word to describe cellular housekeeping. When we have low enough intake of carbs and protein, or when we do intermittent fasts, our bodies can take care of their “to do” lists.  That list includes breaking down weak or damaged cells, recycling the good parts and discarding the rest, and slowing down the processes that can lead to abnormal cell growth (i.e. excess proteins in Alzheimer’s disease, abnormal cancer cells etc.).Admittedly, long term outcome studies evaluating fasting or LCHF and cancer or dementia risk have not been done. But, on the flip side, drug trials to prevent the same are showing no benefit despite hundreds of millions of dollars invested. If you asked me (which you sort of did since you are reading my article), I’d vote for autophagy as a preventative strategy any day. It makes good physiologic sense, and it is so easy to achieve.
7. With Keto You Will Enjoy Eating Again!
   That’s right. A way of eating that helps you lose weight, helps you feel better, improves your health and is actually enjoyable! No fake processed soy products, no cardboard tasting rice cakes. True, it also means no more candy, processed snack foods, doughnuts and danishes. But once you swear them off for a few weeks, and you are eating all the eggs, avocados, nuts, fish, steak, cheese etc. that you want, you won’t miss those old crutches any more. Let the enjoyment begin!

I could go on, but since it seems people like “7 Reason” articles, I will leave it at that. 

Now you know the secret: Look at the whole picture. Look for a lifestyle, (not a diet) that helps you feel better, increases your enjoyment, and still benefits your overall health.

Is LCHF/Keto the right lifestyle for you? It just may be. To learn more about Low Carb and Keto, download this free E-Book:

Thanks for reading,
Bret Scher, MD FACC
Founder, Boundless Health
www.LowCarbCardiologist.com

ADDENDUM!!

Since I have published this article, there has been a windfall of media buzz around low carb diets increasing our risk of heart disease or diabetes. Let’s look at where that information came from.

1- A study force feeding mice excessive amounts of industrial omega 6 oils. You can guess what I have to say about that. The article was incredibly helpful, and I immediately stopped force feeding my pet mice industrial seed oils. Thanks goodness for that article. As for how it applies to humans eating real food that contain fat, there is zero correlation.

2- Epidemiological study suggesting those who ate low carb (40% calories from carbs, which by the way is NOT low carb) as measured by two food journals over 25 years had a higher risk of dying. Oh and by the way, at baseline they were heavier, more sedentary, smoked more, and ate fewer veggies. Yet somehow they concluded it must be the low carb diet that “caused” the harm. Once again, it may not be bad science, but it sure was awful interpretation of the science.

In light of those two studies and the hoopla surrounding them, has anything happened to change my mind about a LCHF/keto diet being beneficial for our overall health and our heart health?

Absolutely not.

We still need to individualize our care and our lifestyle for who we are and how our bodies respond. That is always the case regardless of our nutrition, our medications, our exercise etc. As long as we do that, then this cardiologist still believes that LCHF IS HEART HEALTHY!

If you liked this post, you’ll love my free E-Book on Low Carb/Keto Starter tips to help you get started on your LCHF path!

Thanks for reading.

Did you know changing the way you eat may be able to normalize your blood pressure completely? For many people it’s true. But what’s surprising is that it isn’t changing to the diet that most doctors and dieticians recommend.

The DASH diet, Dietary Approach to Stop Hypertension, has long been the “go-to” diet for reducing blood pressure. The DASH diet is a high carbohydrate, low fat diet that recommendseating plenty of fruits, veggies, whole grains, and limiting salt and saturated fat. And while that works for some people, many others can normalize their blood pressure with a nearly opposite approach.

A 2023 study published in The Annals of Family Medicine, demonstrated that a very low carbohydrate diet with no limitations on the amount of salt or the amount or type of fat eaten was better at lowering blood pressure compared to the DASH diet.

Many wonder how this could be, but the answer is pretty straightforward.

Poor metabolic health, from insulin resistance to type 2 diabetes, is a leading cause of high blood pressure. And low carb diets are one of the best lifestyle approaches for improving or even normalizing metabolic health. Therefore, it makes complete sense that a low carb diet would be highly effective at normalizing blood pressure.

Of course there are many other ways to improve blood pressure, such as quitting drugs, tobacco and alcohol, getting regular exercise, managing stress, etc. And these are very important. But since everyone has to eat, it is powerful to eat in a way that can normalize blood pressure.

Let’s explore four ways how low carb diets can help blood pressure.

1- Weight loss
Having overweight or obesity is a strong contributing factor to high blood pressure. And while low-carb eating isn’t the only way to lose weight, it tends to be as good as or even better than low fat eating for weight loss. Some publications even demonstrate weight loss on par with highly effective GLP1 weight loss drugs like Ozemipic and Wegovy.

2- improved metabolic health
As mentioned, metabolic dysfunction is a clear trigger for elevated blood pressure. And while low carb eating isn’t the only way to improve metabolic health, it is likely the most effective dietary pattern for improving metabolic health, and can even do so with or without weight loss.

3- Ketosis
If someone lowers their carbohydrate intake enough, they can enter a state of ketosis, a normal physiologic state where we burn primarily fat for energy instead of carbohydrates. When this occurs, our insulin levels drop to a normal level and we have a natural diuresis, meaning we eliminate sodium and water more than usual. This can help lower blood pressure above and beyond weight loss.

4- Avoiding processed foods
Most well formulated low carb diets avoid highly processed junk foods like potato chips, candy, doughnuts, etc. that can lead to high blood pressure. So, simply eliminating these foods can also contribute to lower blood pressure.

What about salt?

One of the big misconceptions about blood pressure is that we all need to lower our salt intake for better blood pressure. However, this appears to be a gross over-generalization. There’s a growing understanding that a minority of individuals have “salt sensitive” hypertension. This means that the majority are unlikely to affect their blood pressure by altering their salt intake.

Furthermore, where we get our salt likely makes a difference. For insurance, if someone is getting their salt from highly processed foods like chips, pretzels, etc, they are hit with an ultra-processed combination of salt, calories, carbs, and sugars that is bound to raise blood pressure.

But what if someone is eating whole foods like broccoli, cauliflower, steak, and avocado, and they add salt to that meal? Clinical experience suggests our bodies react much differently to this type of salt exposure, and people can dramatically lower their blood pressure despite adding salt to their diet.

Low Carb Eating Works

So while it may not be the right approach for everyone, it is increasingly clear that eating a well-formulated low carb diet is a safe and effective way to lower blood pressure. It’s time to include low carb diets as a first line treatment option for normalizing blood pressure.

Thanks for reading!

Bret Scher MD FACC

Here it is again. The term “healthy” connected as a descriptor.

We see it all the time. Healthy Whole Grains. It reminds me of the common use of “fruits and vegetables,” as if they are one in the same.

Are whole grains, by definition, “healthy?”

For a full, in depth description, see the Whole Grains Guide on Diet Doctor, where I was the medical editor and reviewer.

For the quick answer, let’s leave it as a “maybe.”

If you choose to eat refined grains, white flour, processed snack foods, in essence the Standard American Diet, then switching to whole grains will almost certainly improve your health. And that is where the majority evidence in favor of whole grains stops. Compared to refined grains, they are great.

Who should eat whole grains?

If you are insulin sensitive, live in a society where you are physically active for most the day, eat fewer calories than most industrialized nations, and maintain a healthy body weight, then whole grains can be a healthy part of your diet. Observation of the Blue Zone countries demonstrate that whole grains can be part of a healthy lifestyle in that setting.

We cannot, however, extrapolate those findings above to apply to all Americans, Europeans, Asians etc. and say whole grains are by definition “healthy.”

Who should not eat whole grains?

If you are metabolically unhealthy with diabetes, metabolic syndrome or insulin resistance (estimated to be 88% of all Americans), then whole grains are anything but “healthy.” Borrow a continuous glucose monitor for a day and see how your blood glucose responds to whole grains. If you aren’t perfectly metabolically healthy, it isn’t pretty.

Instead, if you eat a whole-foods, low carb diet without grains and sugars, then whole grains have no necessary role and no association with health.

Enjoy the more detailed guide from DietDoctor.

Thanks for reading,

Bret Scher, MD FACC

I live in McAllen, Texas, where it’s difficult to find a doctor who’s knowledgeable on the benefits of a low-carb lifestyle. Because I battle a high A1C AND high cholesterol, I reached out to Dr. Scher for a consultation to monitor my blood work and develop a plan that will keep my heart healthy and my A1C in check. Before our video-consultation, he responded personally to every question I had via email. When I first reached out, I figured it would take at least a month or more to schedule our consultation, but to my surprise, it was planned just over a week from my initial email!

I like Dr. Scher’s commonsense approach to a healthy lifestyle. He came up with a very-easy-to-follow plan and agreed to review my bloodwork every 6-8 weeks to make sure I’m on the right track. Because of my family’s history, it’s comforting to know I have a cardiologist monitoring my health so that I can prevent a significant problem down the road.

Nicole Southwell