New study: is low carb sustainable in the long run?

April 30 2018 by , medical review by in Diabetes studies, Failed low-fat diets, New study

A team of researchers in Japan has been studying low carbohydrate diets. In a study published in January 2014, the researchers had already found that a moderately low-carbohydrate diet is more effective than calorie restriction for improving lipid profile and blood sugar control in type-2 diabetics.

Now, in a new study, the team set out to find out whether eating a moderate low-carb diet is sustainable, effective and safe long term.

The researchers followed 200 patients with type 2 diabetes over a period of three years. They found that a moderate carbohydrate restriction (70–130 g/day) was enough to have a positive effect on the patients’ health markers, and that the diet is “highly effective, safe and sustainable”. They added that:

Over 36 months, the [moderate low carb] intervention showed sustained effectiveness (without safety concerns) in improving HbA1c, lipid profile, and liver enzymes in Japanese patients with type 2 diabetes.

Nutrients: Efficacy of a Moderately Low Carbohydrate Diet in a 36-Month Observational Study of Japanese Patients with Type 2 Diabetes

One of the big criticisms of low-carbohydrate diets is the claim that they are unsustainable long term, so it’s great to see teams of researchers carrying out studies to find out about the effects of following a low-carbohydrate diet over longer periods of time.

Check out our free guide to learn more about different levels of carbohydrate restriction. We also have some fantastic video courses, like this one, for getting started on a low-carbohydrate diet.

Low carb basics

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Low-carb tips with team Diet Doctor – Traveling
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How do you stay low carb when traveling? Watch this episode to find out!
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A global food revolution
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The mistakes behind the obesity epidemic and how we can fix them together, empowering people everywhere to revolutionize their health.
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7 tips to make low carb simple
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The star of the BBC series Doctor in the House, Dr. Rangan Chatterjee, gives you seven tips that will make low carb easy.
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Women's questions introduction
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In this video series, you can find expert views on some of your top questions about low-carb and women's health.
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Diabetes

My low-carb story with Marc Gossange
03:01
After living somewhat of a high-carb life and then living in France for a few years enjoying croissants and freshly baked baguettes, Marc was diagnosed with type 2 diabetes.
My success story with Kenneth Russell
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When Kenneth turned 50, he realized that he wouldn't make it to 60 the way he was going.
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A low-carb story with Dr. Sanjeev Balakrishnan
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How can you as a doctor treat patients with type 2 diabetes? Dr. Sanjeev Balakrishnan learned the answer to this question seven years ago. Check out this video for all the details!
Can low carb make it fun to be a doctor?
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Dr. Unwin about getting his patients off medications and making a true difference in their lives using low carb.
Living low carb with Chris Hannaway
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What does living low carb look like? Chris Hannaway shares his success story, takes us for a spin in the gym and orders food at the local pub.
How to avoid complications of type 1 diabetes
37:28
Why are the recommendations to people with diabetes to eat a high-carb diet a bad idea? And what is the alternative?
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Living low carb with Yvonne Lane
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Yvonne used to see all those pictures of people who'd lost so much weight, but sometimes didn't really believe they were real.
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35 comments

1
Pieter
April 30 2018
2 years on low carb, not looking back :)
2
Mary Titus
April 30 2018
16 years on a very low carb ketogenic lifestyle. I'm not looking back.

Reply: #34
3
C. Steely
April 30 2018
I have been on low carbs or Atkins for two years. All my blood panels are now perfect. A1c is down from 8.9 to 5.0 Liver panel is better now than before starting the diet. I feel better than ever and have lost 35 lbs.
4
Robin L Olson
April 30 2018
I went no sugar, low carb about 1 year ago, my arrhythmia is so much better and my weight is down 45lbs without exercise or lower any other food intake. Not looking back either
5
N.Carter
April 30 2018
I hate doing low carb I feel like I’m always just wanting to eat something carb rich or feeling like I can’t just live regularly

Reply: #30
6
Cynthia Wellington
April 30 2018
Went lchf about 9 months ago due to chronic migraines. It was a choice between this or epilepsy pills to treat the migraine frequency. I'm down 45lbs. Went from 3 to 5 migraines a week to 1 or 2 a month. Will I ever stop lchf? No! Do I miss the way I used to eat? No! This gave me my life back and dont ever plan on giving it up!
7
Jean Gonynor
April 30 2018
Been low carb Atkins for most of my adult life (I am 51). My blood work is phenomenal, I have amazing energy, I'm never hungry and I eat wonderful tasty food. I will never go back.
8
Blaze Jordan
April 30 2018
I went low carb six months ago after being diagnosed as a type 2 diabetic. I've lost 67 lbs. My a1C went from 14.0 down to five point eight in 6 months time. I've adjusted to the lifestyle. I've learned how to eat healthier. But also eat my "guity pleasures" in moderation. I've never felt better and im not Looking back.
9
Jamie.
April 30 2018
Cutting out any type of macro isn't healthy nor sustainable long term. I don't care what anyone says. But the quality of the carbs count. Instead of bread, rice or pastas, eat vegetables and low glycemic fruits, and watch not too eat too much fruit as it contains sugar it all adds up. Even tho alot of people can do and stay on low carb diets doesn't mean you should or it's healthy for long term overall health.
10
Marie
April 30 2018
First, I found Keto three years ago while prepping for my wedding. It helped me get skinny and cleared my skin issues.

Then, I loosened up a bit because...why not? I wanted some cake and pretzels.

When I got preggo, I stayed low carb. Now that the baby is 1, I've gone back to keto.
This is the lifestyle that just keeps on giving!!!

Next up, trying to convince my diabetic mom that most of what she "knows" about food is dusty old science.
11
Andrea
April 30 2018
Jamie, I hope you add that caveat to high carb low fat too. HCLF is insanely unsustainable. As is vegan (talk about cutting out a food group). Note that HCLF can't fulfill all nutrients without processed wheat (ie the fortified nutrients). Yet low carb and high fat can.
12
Catherine Leal
April 30 2018
Don't consider it a diet but a wonderful life style change. Practiced low carb for many years. Best ever. Could never go back.
13
Jamie
April 30 2018
Andrea, absolutely!! I don't eat high carb low fat either. I eat lots of green veggies with olive oil and eat avocado as well, yunno the healthy fats and some seafood sometimes turkey, fruit and whatever I feel I need at the time and I really don't need junk foods, as I dont want that stuff anymore as my palete has grown used to healthier fare, I really believe nothing should be eaten in excess and alone, there is a place in the diet for a combination of fats proteins and carbs. I just dislike extreme diets including low fat. There needs to be a healthy ratio of all the macro and micro. And trust me I've tried every kind of diet. Keto included. I tried keto for a year one time put on weight!. I tried vegan and Atkins low fat , vegetarian ect.... I've literally exhausted myself trying every dam diet out there. At the end each individual should try what works for them. From personal experience diets don't work for me. When I stop obsessing over every little thing and just focus on foods that nourish and help my body is when I look and feel my best. Low carb and low fat both made me feel terrible and I didn't feel it was sustainable for me. Each body is different. But I think cutting out nutrient rich food groups is a recipe for disaster. It is. I do a lot of nutritional science and research as I love it and it is my passion to help and educate others, I love to help prople feel good and want others to live long pain free lives:)
14
Jamie
April 30 2018
I also enjoy naturally eating only when hungry. Which for me is a natural form of intermittent fasting. Usually I go most days anywhere from 16 at least till 23hours, even sometimes every 46 hours if I start to feel sluggish and want a reset in my digestion. I believe Dr fung on his studies, on the timing of eating being even more important, since no matter what you eat healthy or not, that every time you eat something your insulin goe up if you can reduce the amount of times you eat you reduce the amount of times insulin goes up which causes fat storage on your body if its constantly going up.Intermittent fasting also is supposed to help us live longer I advise anyone to look into intermittent fasting even if you only fast 12 hours you still get some great benefits most people do that unknowingly already overnight when they eat their last meal.
15
Wiscdev
April 30 2018
The study linked from this post says it was for six months. Nowhere does it say 3 years. In fact it ends with: "Because the number of subjects enrolled was small and the study duration was short, longer multi-
centre studies with a larger sample size are needed to con-
firm our findings." The study does not appear to be about long term low carb diets at all.

Reply: #32
16
Mary
April 30 2018
I followed a low carb high fat diet for years and it was fantastic until about 10 years later when I developed an allergy to eggs ( ate too many) an intolerance to high fat causing inflammation in joints (early onset arthritis) and endless fatigue due to low blood sugar. I learned so much from the diet though so I continue to practice the basics but now I eat more whole grains and fruit and am able to maintain a steady healthy weight and feel better doing it!
17
Imright
May 1 2018
Wow, what a load of crap. Lol low carb, good luck not getting a heart attack by 25.

Replies: #20, #31
18
Freddie
May 1 2018
Ask the Inuit- it was their traditional diet for centuries. I think that constitutes a long-term study and the answer is yes, sustainable for a lifetime.
19
Gary
May 1 2018
I'm on a carb only diet (I eat nothing but potatoes and pizza crusts), and I feel fantastic! ??
20
Reply to comment #17 by Imright
Mark Twain
May 1 2018
Imright- I've been doing it for a long time (20) year. I'm healthy as can be. No medical issues. Praised by my doctor for excellent health. So, where's your facts to support I'll get a heart attack?? Your comment is deplorable. I know what it's done for me, and read all the comments of folks on it...nothing but praise. You should change your name to "imwrong".
21
Mark
May 1 2018
Can anyone tell me how to maintain and not lose or gain after I've reached my weight loss goal? I've been limiting carbs to 30 per day on keto. I've almost reached my goal and want to maintain.
22
Valerie
May 1 2018
You conveniently forgot to mention the weight loss results. About 1kg lost after 3 years.
Disappointing, to say the least.
Given that most people look into the low-carb diet for weight loss purposes, using this study to claim that it is "effective" is just plain dishonest.
23
Margie
May 1 2018
The link where it says “new study” is to a 2014 study. In the middle there is a different link which is to the study being discussed in the article.
24
Bryan
May 1 2018
Been doing low carb for 4 months and have never felt better. I have more energy, feel full with less calories, and have lost a significant amount of weight. I have no desire to eat carbs again.
25
Lesley
May 1 2018
I've been low sugar, low carbs, high fat, high protein for 3 months. Lost 12 kg with no extra exercise. Never really feel hungry, have never felt better. Keep sugar to 24g/day and carbs around 50 to 100g/day. Totally sustainable and easy.
26
Julian
May 2 2018
I am 58 exceptionally active and still take part in competitive MMA.
I stay low carb most of the time but every few months need to have a beer and a pizza, normally for my sins I pay a penance of several days 24 hour fasting.
WHY does beer not show it's carb content on the label instead of just it's alcohol % ?
27
Esther
May 2 2018
These studies are encouraging.

I am about 4 months into LCHF. I have told lots of friends about it. One friend had fatty liver. And another high cholesterol/ weight.
They are doing quite well, and spreading the word :-)
I’m on a plateau with my weight, but all clothes are loose. So still happy :-)
And will never go back to my old eating habits
28
robert
May 2 2018
LCHF + IF since Feb 2014 = 4 years 2 months. All is very good. It IS sustainable!
29
Tanya
May 3 2018
May 15th will be 2 years on keto. Down 60 lbs. and feel amazing. No longer even think about the pre-diabetic state I was in. I will never go back to the sad life I was living then. It is definitely sustainable.
30
Reply to comment #5 by N.Carter
John
May 3 2018
This means that you are insuline resistant. Keep it up and the cravings will disappear.
31
Reply to comment #17 by Imright
John
May 3 2018
Seriously, did you do any research or are you ignorant?
32
Reply to comment #15 by Wiscdev
Antoinette
May 3 2018
It talks about a 36 month study, last I checked 36 months:12=3 years!
33
? nk
May 7 2018
I have thyroid and cholesterol issues and am within the suggested bmi..tried Keto meal plan suggested by diet doctor for two weeks and barely lost a kg?If you notice there is a day where you are eating 4 eggs? I have now gone back to my usual pattern and my conclusion is that if you have been eating well and in moderation then Keto is definitely NOT A WAY to go!i felt more stressed ? than anything to be honest..
34
Reply to comment #2 by Mary Titus
Sarah Red
November 15 2018
Mary this is exactly what I need to hear. 16 years is maybe the longest i've heard people go. I want to make sure it's long term sustainable.
35
Murray
July 31 2019
I’ve been following a low carb lifestyle for just over 6 months and have dropped 90 pounds so far. I have occasional cheats but have found that my hunger is satisfied and cravings for junk food is lowered. I can’t see going back to old poor habits when this seems so easy.

New study: is low carb sustainable in the long run?

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