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Ketogenic Diets – A Fat Lot of Good?

Where did it all go wrong? In the infamous olden days people didn’t worry what they ate, they worried if there was enough. Can you imagine a medieval peasant talking about going vegan, or cutting out carbs? They just ate whatever they could, and yet they didn’t die of Western diseases nearly as readily as we do.

We’ve never had better access to cheap and plentiful food, but nor have we ever had so much obesity, diabetes, heart disease, cancer, Alzheimer’s… This is probably why there are more diets than religions these days (and why discussing them is just as heated!).

Fats vs. carbs, meat vs. plant-based, GAPS, Paleo,… – every faction of the nutritional world is doing their research and touting the benefits, making food a minefield for the rest of us.

In the fat camp is the Ketogenic diet. Ketogenic eating is all about harnessing our body’s capacity to be dual fuel machines, not purely reliant on glucose but also able to run on fat. Why else do we store the stuff?

Clean Burning Energy

There’s evidence that a ketogenic (‘keto’) diet improves conditions like autism, obesity, type II diabetes, heart disease, cholesterol, cancer, Alzheimers, Parkinson’s, IBS, heartburn, fatty liver disease, anxiety, depression, epilepsy….

Studies suggest that in a state of ketosis the body is running 25% more efficiently, and levels of inflammation are reduced. In turn this leads, it is argued, to a recovery from illness. The keto diet is also well known anecdotally as being effective for weight loss.

Keto fans say they feel great while they’re doing it, with reports of better athletic performance, faster healing, increased mental clarity, more energy and greater stamina.

Get the diet right and they say your body behaves in a similar way to when it’s fasting. Not by breaking itself down in ‘starvation mode’, but with many of the healing benefits.

Do I Only Eat Lard?

The diet requires you to get the majority of your calories from fat, eat reduced amounts of protein, and very low amounts of carbs.

The exact proportions vary from person to person but the typical macronutrient breakdown is around 70% of calories coming from fat, 15-30% from protein, and just 5-10% from carbs.

Eating this way causes insulin levels to fall and fat stores to be released. The liver turns the fat into ketones and the body enters ketosis. Now you’re running on a totally different fuel – ketones instead of glucose – with some seemingly radical benefits.

Foods that are typically popular for a keto diet are coconut oil, butter, olive oil, seafood, cheese, eggs, meat, dairy and veggies (the majority of veggies are low in carbs, particularly those that grow above ground).

The trick is to keep carbs down below about 20-50 grams, which isn’t particularly easy. You can blow it just by eating a banana or two.

But I’m Plant-Based!

It’s true that ketogenic diets typically include seafood and animal products due to their high fat and low carb status, but it is possible to stay in ketosis on a plant-based diet, by eating plenty of fats and ‘above ground vegetables’, while omitting grains, sweet fruits and legumes.

Can I Upgrade My Organs Too?

One of the more recent suggestions is that when we enter ketosis, we burn the fat in and around our organs first, and so improve their ability to perform better.

How Will I Know If I’m In The Zone?

Many of us enter mild ketosis during the night, which contributes to morning breath. Your partner might keep you updated on your breath, but you can more accurately measure ketosis via urine, blood, or proper breath analysis.

Each can be tested with a simple strip or device, and each mode of measurement varies in cost, with urine testing being the cheapest but least reliable in terms of the body’s actual state.

Ketosis starts when our blood levels of ketones reach about 0.6mmol (‘millimoles’) per litre of blood. Levels can go up above 3.0 on a serious keto diet or fasting. Generally you’re getting benefits if you’re sitting between 1.5 and 3.0mmol.

Will Keto Make Me Live Longer?!

One of the key benefits of ketosis may be the reduction in mTOR. mTOR is an ‘accelerator’ that helps increase metabolic activity and build muscle but also increases the negative and damaging byproducts of metabolism, including ageing and possibly even cancer.

Lower levels of mTOR (seen in fasting and ketogenic diets) cause the body to increase ‘autophagy’, a process in which the body clears out unwanted cells that are no longer helpful.

Current thinking is that, in this way, the body prioritises the scavenging of pre-cancerous cells, cysts, weak mitochondria, and general junk that has built up from all the boom times.

Is This Too Good To Be True?

There’s certainly evidence that long-term ketogenic eating can start to send your health in the wrong direction.

Ketogenic diets are low in the all-important fibre, and also cause changes to our microbiome that we don’t yet fully understand.

We can sometimes reduce the impact of unfriendly inhabitants of our gut by lowering our carb intake. However at the very low carb levels of a keto diet we may also weaken our friendly gut bugs and lose out on some important benefits they provide.

Is It Practical?

Perhaps the main drawback is that it’s an extremely fiddly diet, and not the most sociable way to eat. Your hosts, partner or waiter might not want to weigh out your carbs for you! And one slip on a banana can send you out of ketosis.

Keep in mind that it takes a lot of work to calculate your correct macronutrient levels (fats, carbs and protein), and you’ll need to monitor your ketone status regularly in order to remain in the zone.

Learning From The Past

If we follow periodic or intermittent fasting our body will naturally dip into ketosis for a few hours each day. This is certainly a good way to get some of the benefits without all the hard work of actually following the keto diet.

And keto diets seem to be very healing for some. Anecdotal success stories are certainly common, with claims of easy weight loss, lowered inflammation, and the healing or easing – or even disappearance – of chronic health conditions.

The keto diet might also be a reminder of lessons to be learned from our ancestors. During Summer and Autumn, food was plentiful and they ate as much as possible. They put on fat and their bodies would amp up, building muscle and laying down precious fat reserves for the hard winter ahead.

Once the stores of foods ran low during late Autumn and early Winter, our ancestors were potentially dipping in and out of ketosis or even staying in it continually. During that time their bodies were naturally clearing out unwanted metabolic by-products and excess fat, experiencing the benefits, and priming their bodies for the next season of plenty.

But they didn’t stay in ketosis indefinitely. They experienced seasonal and intermittent cycles of boom and bust.

In contrast, most of us in the 21st century stay in boom all the time, never giving our gut and metabolism a break, and we wind up with a host of health problems.


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52 thoughts on “Ketogenic Diets – A Fat Lot of Good?”

  1. Jenjen Balatico

    Heard and read so much about keto diet and this one has a lot information to give. I know a lot who love and seen results after they start keto, but I guess this is not for me.

  2. I was at my heaviest between 2020 and 2021, and a friend suggested I read more about the keto diet. It works! I was physically active and worked out before the pandemic, so I wasn’t used to skipping workouts until we were all made to remain indoors.

  3. Thanks for sharing! I have been off and on diets for 30 years. Keto is one of them. Or least my version of it. I never understood the fat based part but followed it.

  4. As an intermittent Faster, I love and utilize many of the principles found in a Keto diet. Though as a body builder, I tend to eat a higher amount of Protein than most Keto dieters.
    I do love the health benefits that both diets have to offer beyond just losing weight as well.

  5. Melanie Edjourian

    It’s interesting to read the conditions a ketogenic diet can help with. I’ve not tried this properly but am considering it.

  6. I’ve always wondered about a keto diet especially since everyone around me went on one! Although I’m all about eating in moderation and exercising, I’m still quite curious about trying it out.

  7. Many friends of mine have tried keto and were able to drop weight very quickly. I tried a few times but its very hard to stick to it!

  8. The only time I tried keto was when I was pregnant last year and I was able to maintain the weight I wanted to. The only reason I don’t keep it up is because I love my fruits and have no desire to give them up. I did love finding new recipes and trying them with my kiddos who loved all of them too.

  9. I have heard so much about keto, however i suggest to consult your doctor first. I have a friend who overdo it and ended up having kidney stones. This diet needs discipline and determination in order to work.

  10. I have heard a lot of great stories about the Keto diet. I think it’s about time that I give it a try

  11. I definitely would love being in the good ‘ole days where people ate what they wanted without having to worry about weight lol. I have heard so many great things about the keto diet and would love to test it out!

  12. I did a keto-lite diet for a bit but it was difficult to maintain with no one else in the family on it! I would love to do intermittent fasting but I am on a strict timeline for my medications which seem to not fit with any timelines that I have seen. I am still looking! Great post!

  13. Well, I know a lot of people for whom Keto helped but it requires a lot of discipline and one I can only promise for Intermittent Fasting. However, this is a very informative blog.

  14. blair villanueva

    I never tried Keto (and honestly I’m not sure if this is for me), however, it is good learning about Keto and its goodness. I love to eat anything and be happy 🙂

  15. really like the tone of your writing! very interesting! thanks for sharing! Since I have started my travel cycling I met people following this diet, and I don’t stop to hear about it… in spite that I have been suggested for more than 10 years to reduce and even stop consuming carb!! I am a bread addict and a nomad… which makes me… anyway really enjoyed this reading! thanks again!

  16. I have some colleagues who have been to keto and have lost tons of weight. Although I don’t know if I can do it

  17. I’m somewhere between keto and low-carb and it has made such a huge difference in our family’s lifestyle. My diabetes is able to be managed without meds (I’m not a severe diabetic though) and my husband’s glucose intolerance is barely an issue. Such a life changer!

  18. In my mid-forties, I have given up on diets. Lifestyle changes are where it is at and most recently, I have been doing intermittent fasting. My definition of that is not eating breakfast so early in the AM. I generally don’t eat my first meal until after 11am, sometimes not until after 1pm. It depends and while this may not be the best way to go, it is working for me as I am 2.5 pounds away from a goal weight I have been working towards since 2014.

  19. Fantastic approach to explaining Keto. As someone who knows very little, this was engaging and clear. Thank you, kudos to you for your writing skills and knowledge!

  20. I’ve tried keto but it doesn’t work for me. I need an extremely high fiber low to almost zero fat diet to help with gut issues I have. So keto is pretty much the exact opposite and makes me feel terrible. For the people it works for though it can do some amazing things

  21. I have a few friends who have done keto and have seen great results. I have mixed feelings about it, but to each their own. This post is great and super informative. I will most definitely share with my Keto Friends

  22. I always follow diet. I am not fat but a bit curvy. However there are many things I wanted to know always has been answered here.

  23. I have friends on Keto and it works wonders for them. My problem is discipline in keeping up with a diet. Especially this one. Thanks for the great read, and making think that it’s not as hard as it can be.

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