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9 Common Lies About Intermittent Fasting

9 Common Lies About Intermittent Fasting

For years, I’ve always felt a little ashamed of myself for not eating a full, hearty breakfast. At best, I could be found in line for coffee and a bagel to consume as quickly as possible on my way to work or class.

I thought, if I could just get breakfast down, I’d be treating my body so much better.

But now, I’m starting to think I should have been skipping breakfast and perhaps even lunch as well.

Odds are, you’ve heard about intermittent fasting. Not just a part of religious rituals anymore, fasting is taking the dieting and fitness world by storm, and lots of scholarly ink is being spilled to figure out how effective it really is.

Yes, people who have adopted this diet are literally starving their bodies for long stretches at a time. Not only are they skipping breakfast, some are even skipping full days of eating altogether. But they aren’t crazy.

People seeking to lose weight and keep it off are reporting promising results thanks to intermittent fasting and it’s drawing the attention of body builders and athletes everywhere.

As with all new health crazes, intermittent fasting is being dismissed by some as a passing fad, despite the ample evidence that it may actually be extremely beneficial. So, I’ve collected a list of nine common lies and misconceptions you may run into when learning about this new fat burning technique.

Lie #1: You can lose weight without a calorie deficit

good counting caloriesFitness and weight loss gurus have been all over intermittent fasting for the past few years, proclaiming it as the weight loss technique of the future. One of the main claims they make is that you won’t have to worry about counting calories anymore.

They say about feed-days: eat as much as you like, whatever you like, and you’ll still lose weight!

This is completely false and potentially dangerous for people who want to attempt the intermittent fasting diet. The body requires a negative energy balance to lose weight. You have to put less energy into your body than you burn to have weight loss over time, period.

There’s no magical way to get around the body’s energy balance. In order to lose weight successfully, especially if you’re seeking to build muscle mass, you have to keep track of everything you eat. If you’re considering intermittent fasting because you think it will allow you to eat all the disgusting junk food you want, you’re probably not ready for it.

Lie #2: You have to go entire days without food

fasting empty plates bowlsTo a lot of people, myself included, the idea of spending an entire day without eating anything sounds a little daunting. When people hear the word ‘fasting’, they associate it with complete starvation. But that’s not necessarily the case.

Dr. Krista Varady, author of The Every-Other-Day Diet during her post-doc research at the University of California Berkeley, found that mice who consumed 25 percent of their daily calories one day, did not end up consuming 175 percent the next day. Because they weren’t fully compensating for the lack of food the day before, they began to lose weight.

When this was put into practice in human beings, on average they only consumed around 115 percent of their daily caloric allowance on the days they were allowed to eat as much as they wanted.

Assuming your average diet is around 2000 calories, a fast day might be cut down to around 500 calories. If you want to push your body’s limits, you could cut down further, but it’s not the recommended course of action by proponents of intermittent fasting .

Lie #3: It’s better to eat throughout the day at short intervals

small portions of food snacksIn the millennia of human existence before artificial lighting, we ate our meals based on our natural circadian rhythms. While more research still needs to be done, modern science is starting to change their tune about what and when the most important meals of the day are.

For sure, the idea that ‘three square meals a day’ is natural is pure nonsense. That’s a modern contrivance. And, the trend of snacking throughout the day or the very American habit of eating all day (to keep the metabolism energized, I’m sure) is certifiably ridiculous.

As ancient hunter-gatherers, we adapted to going long periods of time without food, all while having to expend a considerable amount of energy getting place to place on foot. Then, in order to eat a real meal, we had to do the hunting and killing ourselves. This is why certain offshoots of the intermittent fasting technique have become crazy popular, most notably the Warrior Diet.

Lie #4: Intermittent fasting causes serious health problems

general good health happinessOne of the major problems dieters find is just how difficult it is to comply with the strict regulations of their diets. Consistently low-calorie diets (on a daily basis, with few if any days of indulgence) are notoriously hard to abide by. Faltering even slightly can seriously affect the balance of your metabolism, harming your body and your efforts to lose weight.

In a recent study by the Brazilian Medical Association, intermittent fasting has been demonstrated to be easier to comply with than other weight loss regimens, providing a consistent negative energy balance over time.

What seems to be the main effect of intermittent fasting is how it helps the body to more properly respond to insulin, the hormone that regulates blood sugar. This study showed for the first time that while on an intermittent fasting diet, the body was more capable of responding to insulin.

People who suffer from obesity typically have a harder time regulating insulin, a condition linked to diabetes and heart failure. However, people whose cells respond well to insulin (and are probably not suffering from obesity) need less of the hormone and have even been shown to have greater longevity.

In 2003, a study led by Mark Mattson, head of the National Institute on Aging’s neuroscience laboratory showed that mice who fasted regularly showed greater health, lower insulin and glucose levels in the blood, reduced stress levels, and reduced risk of diabetes, than those mice who were kept on continuous calorie restriction.

Mattson has even suggested that periodic fasting, as with the intermittent fasting diet, “protects neurons against various kinds of damaging stress” in mice and “made [their] brains resistant to toxins that induce cellular damage akin to the kind cells endure as they age”. This could mean that long term intermittent fasting could help the body fight against neurodegenerative diseases like Parkinson’s and Alzheimer’s.

In other words, intermittent fasting may be more efficient, easier to keep up with, and better overall for your health than other dietary regimens.

Lie #5: Intermittent fasting leads to nutrient deficiencies

multivitaminsThe main thrust of intermittent fasting is in teaching your body to eat during certain intervals rather than throughout the day. Fasting for a single day, even if you ate nothing whatsoever, simply cannot lead to a nutrient deficiency.

You’re going to eat again the very next day, or in some cases within a few hours. If you’re maintaining a healthy and balanced diet when you do eat, you’ll be fine.

Still feel worried? Try taking a regular multivitamin. Limit your fasting days to twice a week instead of every other day. Intermittent fasting isn’t some risky method of cleansing your system; it’s about teaching your body to control urges and better self-regulate.

Lie #6: Intermittent fasting causes you to lose muscle mass

defined womans musclesThe reason why muscle mass is lost during extreme dieting is because of a depletion of liver glycogen stores leading to protein catabolism. In the catabolic state (where muscle tissue is cannibalized) the body goes through a process called de novo gluconeogenesis, or DNG, wherein amino acids in the bloodstream are broken down into glucose. When the body can no longer find these amino acids (when it’s starving after particularly prolonged fasting) it finds it where it is most abundant: the muscle tissue.

This is nothing to worry about with intermittent fasting. The body doesn’t need a constant supply of amino acids if it wants to maintain muscle tissue. DNG occurs at 100% in muscle mass after around 28 hours of the body lacking any replenishment of glucose, an amount of time that should never factor into proper intermittent fasting.

If your last meal before beginning your fast was large and well-balanced, you shouldn’t have to worry about these complications. Proteins digest slowly, and a large meal will still be releasing amino acids into the bloodstream for upwards of 16-20 hours. By that point, it’ll be time to eat again.

A study by the American Journal of Clinical Nutrition found that alternate-day fasting (ADF), a 400-600 calorie fast-day followed by a regular day of calorie consumption, demonstrated zero loss of muscle mass after 8 weeks. The average weight loss for the participants was 12 pounds, all from fat stores, without the subjects making any effort to maintain muscle mass or a high protein intake.

Lie #7: Fasting decreases athletic performance

woman exercising joggingRemember Dr. Varady from earlier? She was asked by The Atlantic whether people became sluggish or lethargic while fasting, and if their athletic performance suffered.

Varady, in an experiment to measure and compare performances, had several groups of people wear accelerometers. Some were on the intermittent diet, others were on consistent daily calorie counting diets, while others were on no diet at all. She reported no statistically significant difference in the daily activity of these groups.

She did admit, however, that during the first 10 days of the intermittent fasting diet, people were less likely to go out and exercise, but afterward they resumed exercising at the same levels as they did prior to intermittent fasting.

Dr. Varady told The Atlantic: “But the really interesting thing about that study is that it was best to exercise in the morning on those fasting days”.

The dieters were able to lose more weight by exercising in the morning before their fast-day (heavily-restricted calorie) meal than were those dieters who exercised after the meal. Varady blames this on the impulse to cheat and eat another small meal or snack post-workout.

Lie #8: Intermittent fasting leads to eating disorders

eating disorders girl plate foodIf you fear you may be undisciplined in your dieting and workout regimen, you probably aren’t right for the intermittent fasting diet. Again, this is a technique employed by body builders and athletes, not your average guy with a dad body.

There are plenty of examples of anecdotal evidence for eating disorders caused by the intermittent fasting diet. A lot of this has to do with people feeling, long after they’ve finished with intermittent fasting, that they are never satisfied by their meals, or that it is too difficult to fall back into regular eating habits.

A lot of this seems to be the result of people who take the days where they are allowed to eat as they please as opportunities to gorge themselves on cake and pizza, eating until they feel completely stuffed, overdoing it.

This is not okay. The intermittent fasting diet does say those who follow it can eat as they wish, but they should still be responsible. If you are a person prone to psychological or emotional disorders, or especially if you have a prior history of eating disorders, the intermittent fasting diet is not for you.

But, if you follow the protocols of the diet and maintain a proper negative energy balance for weight loss, being disciplined and careful about what you eat, you can easily avoid these complications.

Lie #9: Intermittent fasting leads to fertility issues in women

fertility issues woman looking sadSome websites out there claim that intermittent fasting should not be attempted by women as it could potentially lead to fertility issues. While it is true that women who engage in extreme calorie intake changes and weight training/ intensive exercise do report menstrual complications, these have yet to be linked to intermittent fasting.

The International Journal of Fertility and Sterility performed a study on the effects of intermittent fasting on ovulation and progesterone levels in 24 women with normal menstrual cycles and found no change when fasting compared to when they weren’t fasting.

In another study performed by the aforementioned Dr. Mark Mattson, it was found that intermittent fasting in young, obese women had the same benefit as a daily calorie restriction diet for “improving weight loss, insulin sensitivity and other health biomarkers”.

If you decide to try intermittent fasting and find yourself experiencing such issues, you should speak to your doctor about how to transition back into a regular diet.

Remember, most of the research done on intermittent fasting has been on participants who need immediate results: people suffering from chronic obesity, or athletes and fitness freaks. If you’re looking for a diet program you can try out for the summer, you should probably skip intermittent fasting unless you’re willing to truly dedicate to changing your body.

The most important aspect of intermittent fasting, and what you can take away from all of the research is this: watch what you eat. Know how many calories are coming from proteins, carbs, and fats. Stick to foods that you know are nutritious.

Intermittent fasting is one of those rare diets that can actually demonstrate real results. So, if it sounds like it might meet your diet and fitness needs (and if you feel like you’re up to the challenge), it may be a good idea for you to try it out.

Have you found success with intermittent fasting? Share your story in the comments below!

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  1. Vishal

    July 18, 2015 at 7:11 pm

    Good post Mike. Would you recommend intermittent fasting to anyone? What are its benefits? And is this technique what Hollywood stars use when they want to put on oodles of weight for a role by intaking calories at once?


    • Mike Kamo

      July 19, 2015 at 2:18 pm

      Vishal, I would make sure they be mindful of how and when they fast — it’s important to do everything in moderation.


    • Brent

      August 29, 2016 at 11:17 pm

      I have been doing intermittent for a year now. I eat between 12pm and 9pm. The first meal at 12pm is protien shake (water and whey protien) along with two boiled eggs. I consume about 1500 calories each day. I workout 2x weekly. I was 215 lbs when I started I am now 190 lbs. I have natural put on 2 in on bicepts, chest size increased by about3 incest, and lost 4 inches in my waste. I’m 37 yes old.

      Email me with questions


  2. Zarayna

    July 18, 2015 at 11:39 pm

    Hi Mike,

    Such an important subject and one that most of us make a mess of or don’t understand. I shall keep this and study when I have more time.
    Most of us seem in a worryingly ignorant state about this and can easily get pushed over into something very unhealthy so thanks for writing about this.


    • Mike Kamo

      July 19, 2015 at 2:17 pm

      Zarayna, glad you found it helpful. Let me know if you have any other insights. Looking forward to hearing much more from you.


  3. Ena

    June 17, 2016 at 10:44 am


    I am going to start fasting, but I am kind of worried. What if I stopped fasting after a while and went back to my regular eating habits? Wouldn’t I gain more weight than ever just like it happens when you follow then unfollow a diet? Also, how do I know I am doing it right? What times do I eat and not eat? what do I eat? When do I exercise?


    • Mike Kamo

      June 18, 2016 at 12:07 pm

      ENA, the ideal way to minimize the chance of fat gain after a fast is to go back to a healthy diet. Resist the desire to binge on any food you see, including processed foods or fast foods, and instead adhere to a balanced diet that should be lots of veggies, fruits, legumes, whole grains, pulses, lean protein and healthful fats. You can still notice a small amount of weight gain, but it’s likely to pack on the pounds than a diet high in processed foods.

      For complete fasting guide, read this page >> http://dailyburn.com/life/health/intermittent-fasting-methods/


      • Amin

        August 20, 2016 at 11:50 pm

        For the majority of people, “whole grains” and “lots of…fruits” is not healthy.


        • Mike Kamo

          August 21, 2016 at 2:17 am

          Yes, but I am talking about a normal person if you’ve any problem with grains there are lots of other healthy options available. Thanks for posting here by the way.


  4. Karen

    June 30, 2016 at 7:54 am

    My sister and I have been doing the Every Other Day Diet (Dr. Varady) for over a month now. We are down about 8-9 lbs. What we are both finding is that there seems to be no rhyme or reason to our weight loss/gain. Some days after a fast day (500 cals) our weight stays the same or has even gone up. I was actually down 11 lbs but my weight went up 3 lbs despite following the diet strictly, doing an hour brisk walk every night, and eating maybe 1000 cals on my “feast” day…although some times less than that. We are unable to find a pattern to determine and understand why we aren’t seeing consistent and continual drops, and why our weight stays the same or goes up. We track our calories and what we burn, and recognizing that sometimes that may not be exactly precise, we always err on the side of caution and round up calories consumed and round down calories burned. In theory we understand weight loss comes from burning more than you consume and we are doing that, but our weight still fluctuates. We have even added an extra fast day as Varady suggests and that might give us a small reduction, but then it stagnates. (Could our age have something to do with it….48 and 49?) We would love to find out what we are doing wrong or not doing right as we just aren’t seeing the results for the efforts we are putting in. Thanks!!!


    • Mike Kamo

      July 2, 2016 at 5:06 am

      Karen, it’s totally normal to have weeks when you lose more than expected, and weeks when your weight remains the same despite your constant efforts. Our bodies are complicated and don’t always cooperate with the estimates of how much we should expect to lose.

      Achieving weight lose involves so much more than just nourishing ourselves with right food. It involves energetic, emotional, and physical principals that all highly influence our body’s metabolic processes.


  5. Ben

    July 23, 2016 at 11:31 am

    Hi Mike,

    Is there study showing results for 16-8 vs. every other day intermediate dieting. Which one do you recommend?


    • Mike Kamo

      July 24, 2016 at 3:11 am

      BEN, the 16/8 method involves daily fasts of 16 hours for men, and 14-15 hours for women. I personally find this to be the most natural way to do intermittent fasting.

      A full fast every other day seems rather extreme, so I don’t recommend this for beginners. With this method, you’ll be going to bed very hungry several times per week, which is not very good and probably unsustainable in the long run.


  6. charmis

    August 4, 2016 at 8:34 am

    Hi Mike,

    I just want to ask I have started a fasting schedule of 10/14 and I am doing my weight training early morning. Is this fine? I have read some articles that saying that some women who is doing fasting will have irregular periods or have an early menopausal.

    I need your answer mike


    • Mike Kamo

      August 8, 2016 at 12:15 am

      CHARMIS,menopause has nothing to do with fasting so far. If you want a check-up. then get your blood test done. Even several studies suggest that people who fast have more energy, better memory and cognition, and increased production of neurotrophic growth factor.


    • Mike Kamo

      August 8, 2016 at 2:05 am

      Also if you want to keep up your workout routine during a fast, then consider working at lower intensity to put less strain on your body. Don’t focus on building muscle at this time. Drink juices and use protein powder to one of your drinks, but remember this could defeat the purpose of your fast.


  7. Amin

    August 20, 2016 at 11:18 pm

    “You can lose weight without a calorie deficit” FALSE
    “You can lose FAT without a calorie deficit” TRUE


    • Mike Kamo

      August 21, 2016 at 5:26 am

      AMIN, thanks for sharing your views, but you should be more specific about what you want to say..


      • Amin

        August 21, 2016 at 11:59 pm

        Sometimes gurues mistakenly use them term “weight loss” when what they really mean is ” fat loss”.
        The claim that you can lose weight without a caloric deficiet is wrong for the reasons stated in the article; you can however lose body fat without caloric deficit. This is the claim that proponents of intermittent fasting can rightfully make.


  8. Raven Soaring

    September 3, 2016 at 8:10 am

    I have been doing intermittent fasting for 2 months. I’m 67 years old and have struggled with losing weight and keeping it off, for about 50 years. I.F. works for me! This may be the first “diet” that ever has! I do the 16/8 approximately, every day. At first I didn’t feel all that great but my body seems to have adjusted. The biggest miracle is that now I am seldom hungry. Or I don’t “crave” anyway. I believe that I now experience TRUE hunger and really not that often. I am amazed that this works for me. I now have freedom from counting calories and freedom from feeling like I’m starving all of the time. I walk an hour or more nearly every day and I weight train also. I feel no difference in my energy levels. I lost 6 pounds the first month and 6 the second month. I have now entered my third month of IF and I feel great and am very excited about being able to sustain this way of eating (and NOT eating!) for the rest of my life. I plan to just keep doing what I’m doing in terms of eating until my weight loss naturally stops. I believe it is important that this is for the duration, and not just another temporary change in my approach to eating, which in my mind equals a diet.


    • Mike Kamo

      September 4, 2016 at 5:47 am

      RAVEN, thanks for sharing your experience. Glad you found this diet helpful. I’ve already said that if it sounds like it might meet your diet and fitness needs, it may be a good idea for you to try it out. Cheers!


  9. Andreas UH

    November 22, 2016 at 8:25 am


    I am not a person who goes to the gym, but all info I can find seems to follow some form of gym routine. I do some strength exercises every morning combined with the 5 tibetian rite routine. This works extremely well for my energy. Now I just want to lose some belly fat and keep my energy through the day.

    My morning program is a 8×5 program:
    5 feet-ups – ABS (tibetan rite 2)
    5*5 swirls – BALANCE (tibetan rite 1)
    5 high kicks with every leg – THIGHS
    5 kneel/stretch – LOW BACK (tibetan rite 3)
    5 hindu push-ups combined with sun greeting – CHEST (tibetan rite 5)
    5 sit/bridge exercise – LOW BACK (tibetan rite 4)
    5 lying swim strokes – HIGH BACK
    5 squat jumps – LEGS (explosiveness)

    Is intermittent fasting for me? I think it is, but just struggle a bit with the technicals — when to eat and when not to eat. Should I drop breakfast or evening meal?

    If anyone knows a good article about this then I would love some help.

    Thanks a lot.


  10. Tracey Morris

    December 9, 2016 at 6:33 am

    Great reading I am a 48 year old female. I just found out about IF, last month and started doing it…I have been over weight for a very long time, and did not want to try any surgeries…I have lost 8.2 pds, since I started IF it was a struggle in the beginning, but I think it’s going to be okay… I search all the time for more information on IF that I can get…I was wondering about how it affected women and came across your article, this is a life style change for me, not just trying to lose weight…This is for overall Good Health and I do workout and walk…Thanks


    • Mike Kamo

      December 10, 2016 at 4:18 am

      TRACEY, thanks for sharing your experience. Keep visiting and posting here. Stay healthy!


  11. Linda

    February 9, 2017 at 7:27 pm

    Hi there
    What are your thoughts on doing IF (16:8) 5 days a week and 2 days a week eating normally?


  12. TRv

    March 4, 2017 at 12:01 am

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About Mike Kamo

Hi, I’m Mike. One of my biggest passions in life is nutrition and after being certified, I wanted to create a site where I could help readers live a healthy and nutritious life. I believe we control our destiny and we can choose to live a long and healthy life by eating right and treating our bodies with respect.

Let me show you how our simple and efficient online fitness coaching has made it easy for thousands of women to lose weight, and how you can too!

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