(Why) Is Fat Bad For You?

is fat bad for you?

Well gosh, how to answer this question.

How about this:

No, Yes and, Sometimes.

As with most things in nutrition, the answer is almost totally dependant on context. So I’ll tackle each of the answers above in order.

Fat is NOT Bad For You

Why this one first? Mainly because it runs totally contrary to the majority of both public and published opinion.

What we need to do is separate scientific from political information, and I’ll do that for the two main issues related to fat; obesity and heart disease.


Fat and Obesity

The theory goes like this; fat is what we store, we’ve got too much of it, therefore we must eat too much of it, therefore we need to cut it out of our diet.

(linked to this is that fat has 9 calories per gram, compared to 4 for carbs and protein, so if we cut it out we’ll eat fewer calories).

But this answer is both too simplistic, and also goes against what we know from the scientific press and from studies of indigenous peoples.

Why’s it too simplistic?

Because if it was the answer then every person who had gone on a low-fat diet would have lost weight and there wouldn’t be a diet industry…

It’s also too simplistic to see what we have as a problem on the inside as being directly caused by what we consume from the outside (there’s more of this sort of issue with respect to heart disease, but more of that later).

What Does Obesity Research Show?

calories in calories out image 1970's


  • Calories Do Count
  • Calories Can’t Explain Everything
  • People Lose Weight Weirdly





In brief, if you read a book like Anthony Colpo’s superb ‘The Fat Loss Bibleanthony colpo fat loss bible you’ll see that when people are put in metabolic wards (where every bit of food is controlled, and participants can only eat what they’re given) weight loss is equal between iso-caloric low fat and high fat diets. What this means is that you can lose weight by dropping fat or dropping carbs, or both, what counts is creating a deficit; create an energy deficit and you lose weight. At least until you get out of the ward and into real life. Which is when the problems begin, because what metabolic wards don’t teach you is how to construct, cook and eat a diet that both makes you healthy and helps you lose fat. One of the problems I have in writing a post like this is that I REALLY struggle to contain myself and write concisely. This issue here is a good example; I could go off on a slight tangent right now about bland food leading to enormous weight loss, about the effects of reward and palatability, about how low carb diets can be much more sustainable than low fat diets etc, etc, etc. But I’m not going to. I’m going to keep it concise, or try.

So, fat doesn’t, per se, cause weight gain. Excess calories cause weight gain, and it doesn’t matter where they come from. Your body is pretty damn clever at storing calories for some unknown time in the future, and it stores them as fat. If you eat too many calories then your body will preferentially store excess dietary fat as body fat (and you’ll fuel yourself with carbs, but an excess of those will also go to fat stores, and if you do this for too long you’ll get type 2 diabetes, which is actually a protection mechanism against excess carbs and insulin), if you eat super low fat, your body will turn excess carbs into fat, if you eat super low carb – ketogenic, where your body pretty much only burns fat for fuel – but still eat too many calories, that excess will get turned to, guess what? Fat.

Summing Up – Dietary Fat Causes Obesity, but only when it’s a part of a greater excess.

The key when finding a solution to a weight issue is to find a diet and process of choosing and eating food that is sustainable. For some people this will mean eating paleo, for others it will mean going low carb, for others it might mean going ketogenic, and for still more it might mean going to weightwatchers. Whatever. If it works, it makes you happy and you can do it for long periods, I’m happy.

calorie counting southpark cartoon

Captured from http://www.thehealthygamer.com/2012/12/13/sixpack-guide-for-gamers-pt-2-macro-nutrients-and-why-theyre-so-important/

Summing Up Part 1

My goal, when writing this post, was to give you as brief an answer as possible that was actually useful in helping you choose what to eat. I hope that, with respect to how your diet affects your waistline, I’ve achieved that goal. What I also wanted to do was make this post something you could read in 5 mins, but you’ll notice that I’ve not answered all the issues I’d laid out at the beginning. I’ll answer the remaining questions in parts 2 and 3.

Remember, I’ve written this for your benefit, so what I’d ask now is how well I’ve answered your questions about fat? Do you have more questions, has it brought up new issues for you? Or are you just so happy that you can’t contain your joy?

Whatever your state, let me know in the comments :)

Yours in health,




About the author

george harris NLP Hypnotherapist, outdoor fitness and hill walking leader and nutritional therapist living and working in Kendal and the Lake District. Taking hill walks and weekend events for Large Outdoors. Seeing hypnotherapy clients who want to lose weight, stop smoking and lots of other issues. It's the best and most satisfying work I've ever done; helping clients make profound changes to their lives is an honour and a privilege.

5 thoughts on “(Why) Is Fat Bad For You?

  • All fat isn’t bad for you it depends on what it is, if you are eating a bunch of candy bars then yeah that is bad fat and you shouldn’t do it but if you are eating an avocado or something like that then you are making the right choice when it comes to fat. Keep up the good work I love these kinds of blog posts and I learn so much from them.

    • Thanks for your comment Jacob.

      I’m assuming that you mean chocolate type candy bars, rather than ones that are almost all sugar?

      If that’s the case, then yep, bad fats.

      But the point of the article was mainly to suggest that our view of saturated fats as being bad needs to change, and it’s processed foods and processed fats that are the enemy we need to deal with.

  • Thank you for breaking this down the way you did I have been struggling with my weight for sometime now and muscle that I had seems to be covered by fat now which makes me very unhappy but I am still eating very low carb. I must be eating to many calories period if I am still gaining fat right? I am going to sign up for weight watchers or something this is crazy.

  • I feel for Derek because I have had this struggle or roller coaster myself for quite some time and the fact of the matter is there is to much information out there that contradicts each other and all it does is confuse the situation for everyone on what they need to do. We need someone to simply break it down and make it cut and dry as far what you need to eat etc.

  • I think the key to creating a caloric deficit (besides exercising) is using an appetite suppressant supplement. I don’t mean any of the unhealthy pills. I am talking about meal replacement shakes. Some are engineered to include appetite suppressant so you get full with nutrition and you reduce the cravings you might have because of the caloric deficit. You also should do something that makes you happy and not miserable.

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