If you haven’t been living under a rock for the past year or so, then you’ve most likely heard of the ketogenic (or keto) diet.
If you have been living under one, I’m going to need you to crawl out from under it and take a seat because Ketogenic Dieting 101 is about to begin.
Keto is a diet with high fats, moderate protein, and restricted carbohydrates. Initially designed to help children with epilepsy, it’s garnered attention for its effectiveness in regards to fat loss.
The traditional ketogenic diet (also known as the therapeutic ketogenic diet), mimics the effects of starvation by forcing the body to burn its own fat stores rather than glucose. When you restrict carbohydrates, the body enters into a metabolic state known as ketosis, where the liver converts stored fat (triglycerides) into ketones.
These ketones are what the body uses to fuel your brain, organs, and muscles.
On the therapeutic ketogenic diet, the macro breakdown looks like this:
However, as the ketogenic diet’s grown in popularity, especially among people who are looking to lose fat and build muscle, a new form of the diet’s emerged.
While the traditional ketogenic diet is an extremely high-fat diet with sufficient protein intake, the physique ketogenic diet is a high-fat diet but with adequate protein intake.
This is where a lot of the confusion arises around the ketogenic diet, and it’s important to understand the difference.
When the goal is fat loss, the concomitant goal is to preserve muscle mass. On a therapeutic ketogenic diet, protein is set to around 10-15% of total calorie intake. This is the sufficient amount of protein required to keep the body functioning and you healthy – basically so you don’t die.
The problem is, this is far lower than what is optimal for those who engage in regular high-intensity training, like weight lifting. For people who engage regular strength training, the protein requirements are much higher (between 0.8 – 1.2g/lb of body weight). This is the adequate intake. It’ll help preserve and grow muscle while aiding with recovery.
With these alterations, the macro breakdown looks like this:
Fat intake still makes up the majority of the diet, but is slightly reduced so that protein intake can be brought up to a sufficient amount.
Quick note: In the examples above, I’ve used percentages to denote the breakdown of the macro intakes. This is only to give you an overview of the differences between the two different ketogenic diets. I prefer using bodyweight (instead of percentages) to set calories and macro intake, as it’s far more accurate.
Based on this, carbohydrate intake is usually set between 30-50 grams per day.
Protein intake is set between 0.7 – 1.2g per pound of bodyweight per day.
And then the rest of your calorie intake is filled with dietary fats. We’ll figure out this number by subtracting the carbohydrates and protein from total number of calories you should be eating per day.
Don’t worry if you’re confused right now, this will all make sense by the end.
Great question. And the truth is, you don’t have to.
Yup. I know this sounds totally crazy because the internet loves to tell you that you must do this or that, but the ketogenic diet, like any diet, is simply a tool.
That said, it’s a super effective tool. When I experimented with the diet, I discovered these benefits:
Healthy Food Focus
Look, I know healthy food and healthy eating has become the butt-end of lame jokes in the fitness world, but eating healthfully is important. Due to Keto’s low carb, high fat nature, you’re inevitably going to be eating more veggies, lean meats, and healthy fats – all of which are conducive to looking and living better.
This is perhaps one of the most-documented benefits of the ketogenic diet. The number one enemy to the success of a diet is hunger. And the ketogenic diet has a very strong appetite suppression effect. As a result, you’ll find adhering to a calorie deficit far easier
Improve Insulin Sensitivity:
Good insulin sensitivity means better partitioning of nutrients and poor insulin sensitivity (also known as insulin resistance) means poor partitioning of food, this can lead to increased fat gain and worse, metabolic syndromes like diabetes. Now, if you’re already lean, chances are your insulin sensitivity is good, but if you’re overweight, lowering carbohydrate intake can help improve poor insulin sensitivity.
Stable Energy Levels
Due to the reduction of carbohydrates, people tend to see fewer swings in energy levels and resultantly tend to feel better throughout the day.
One of the reasons the ketogenic diet gets such a bad rap is because people give it a try, make these common mistakes, and then they feel like crap and their performance suffers. Don’t fall into these same traps.
This is where I’m annoyingly ambiguous and say, “It depends”. The ketogenic diet is an extremely restrictive diet, and it isn’t for everyone, here are some people who could benefit from it.
But, there are also people who probably wouldn’t do so well on a Ketogenic Diet.
Whew. Ok, now that we’ve got all that theory out of the way, if you’re still reading this, chances are you’re considering trying it for yourself, which is excellent because that’s what we’re now going to talk about.
First thing we need to do is determine your calorie intake. While there are a myriad of online calculators that you could use, I find the simplest way to be the best.
To set your calories, simply, take your bodyweight (in pounds) and multiply it by 10-14. Women should stick to the lower end (10) and men to the higher end (14).
If you’re a 170lb male, multiply your bodyweight by 13-14:
So, 170 x 13 = 2210. These are your calories for fat loss.
If you’re a 140lb female, go with 10-12 as a multiplier:
So, 140 x 10 = 1400. These are your calories for fat loss.
Once your fat loss calories are set, we then need to set up your ketogenic macros. If at this point you’re staring blankly into the screen wondering what a macro is, don’t fret because RFS has you covered.
Go read that quickly and then come back. Don’t worry, I’ll wait.
Done? Good. Let’s carry on.
We know that on a ketogenic diet, carbohydrates are set between 30-50 grams, for the sake of simplicity we’ll go with 50 grams. After carb intake, we’ll set protein intake.
Important note: during the first few weeks of transitioning into ketosis keep your protein intake close to 150 grams (for both male and female). As you restrict carbohydrates and the body transitions into ketosis, it will use muscle protein to make glucose, the 150 gram mark will offset any muscle loss while not interfering with the transition.
After this time – usually the first 4 weeks – you can increase protein intake up to 1.2 grams per pound if you wish. If not, you can keep protein at 150 grams.
And lastly, you’ll set your fat intake with the remainder of calories left (in your previously calculated daily total) after carbohydrate and protein intakes are set.
Let’s put this all together using a hypothetical example.
First, we’ll need to figure out this hypothetical person’s fat loss calorie intake. Let’s assume he’s male and weighs 180 lbs.
Calorie intake: 180 x 14 = 2520 calories per day
That’s his calorie intake for fat loss. Now we can start setting his macros.
Set carbs first: 50 grams (because it’s 50 for everyone).
Protein intake second: 180 x 0.7 = 126 grams
And finally, we set his fat intake by simply following these four steps.
50g (carbs) x 4 (number of calories in one gram of carbohydrates) = 200 calories
126g (protein) x 4 (number of calories in one gram of protein) = 504 calories
So, our hypothetical person’s calorie and ketogenic macros look like this:
Calorie intake: 2,016 calories per day
Carbs: 50 grams per day
Protein: 126 grams per day
Fat: 145 grams per day
This is an extremely low carb diet, and so you’ll be best served restricting carbohydrates strictly to vegetables and fruits like berries. There isn’t any need to track these. Some people will claim that you should track things like tomatoes, carrots, and peppers. Honestly, this is silly to me. Feel free to consume all veggies without worrying about tracking them – they’re all extremely low in calories, and unless you plan on eating truckloads, there’s nothing to worry about.
Nobody has gotten fat, or been unable to lose fat because they overate on a damn salad. You get the idea. Veggies, they’re good for you. Eat them.
Earlier in the article, I touched on the importance of electrolytes, and seeing that they’re of utmost importance on this diet, it’s only right I dedicate a section to them.
Some of the questions I’m commonly asked about the ketogenic diet.
Won’t I lose muscle if I cut out carbs? When calories are reduced there’s always a chance of muscle loss, but as long as you’ve set up your diet properly and are resistance training, you won’t lose any muscle mass.
But, I need carbs for energy, don’t I? while I won’t deny that carbs can most definitely aid performance, they’re not as necessary as you might think. And as long as you set your ketogenic diet up properly – including electrolytes – you’ll be surprised by the amount of energy you have.
Won’t I die if I eat large amounts of fat? Perhaps if you were also consuming high amounts of carbs, but seeing that dietary fat is the main energy source on the ketogenic diet, you have nothing to fear about a high fat intake. Further, there isn’t any evidence to suggest that consuming high fat leads to any health risk.
Are you sure? Yes. I’m sure. I had my blood tested after 6 weeks on almost 200 grams of fat, most of which was of the saturated kind. And everything was in order.
Do calories still count? Yep. Some in the keto world will claim that you can eat as much fat as you like, which is patently false – calories still count on a ketogenic diet. And if fat loss is your goal, you’re going to have to create a calorie deficit.
Hey, so I’m on keto and I…uh…can’t poop? It’s because you’re not consuming enough fiber. Make sure you’re eating ample amounts of fibrous veggies like broccoli, cauliflower, courgettes, mushrooms, etc. You can also supplement with a fiber supplement like psyllium husk.
Can I build muscle on keto? Maybe. I’m not convinced it’s the best thing, though. Keto works great for fat loss, but if you’re wanting to build muscle, I recommend having a moderate amount of carbs in the diet (100-150 grams).
While the ketogenic diet can work brilliantly for fat loss, just remember that it’s not for everyone. Give it a go and see how you feel. If you find it doesn’t suit you, that’s cool, stop doing it.
The number one key to success with any diet is adherence, and what you can stick to is what will help you with your health, fitness, and body composition goals.