‘Macros' are short for macronutrients; fat, carbohydrates, and protein. When you are eating a ketogenic/low-carb high-fat diet, it is essential that you are hitting your macros in order to trigger the body to be in a fat burning state &/or losing weight if that is also your goal. So how do you find your keto macros for weight loss? There are lots of options and variations for finding your macros and different macro calculators will give you some different answers. I have experimented around and found the best and most comprehensive keto calculator to be from Keto Gains.com
how to find your keto macros
Go to the Macro Calculator on the Keto Gains webpage. If you do not have a body fat calculating smart scale then use the link on that page for how to visually estimate body fat. Then work your way down the page, following each instruction. At the end, you will get your macronutrients based on your age, activity level, current body composition and goals. Take special note of your BMR or basal metabolic rate. This is the number of calories that your body needs to fuel each day without any extra exercise.
In order to lose weight, your total calories eaten must be less than this number. Since your carbohydrates are always set to be less than 25 grams, and your protein needs are also fixed, then your fat calories are what decrease in order to run on calorie deficit in order to lose weight eating keto.
It really is that simple. Now that you have your macros, you need to plug them into My Fitness Pal and track your food in GRAMS. If you do it this was your calories will work themselves out naturally.
If you're good and ready to set My Fitness Pal up, you can skip the rest and go here. Otherwise, read on to understand why in order to lose weight on keto your daily protein & carbohydrate macros never change, and you manipulate your dietary fat to either maintain, gain or lose weight.
why dietary carbohydrates are not necessary
Unlike all other organs which happily run on ketones (fat) for fuel, your brain is an exception in that certain brain cells require glucose (about 50 grams per day) because those brain cells can't run on ketones (fat). This causes a lot of confusion and is why some say that you must fuel your brain's glucose requirements by eating carbohydrates, which turn into glucose in the body. But here's why that's wrong.
If you are in nutritional ketosis, the process of converting fat (dietary or stored) to ketones will naturally produce 1 gram of glucose for every 10 grams of fat burned for fuel, which means that you will naturally produce enough glucose for your brain's daily needs while in nutritional ketosis (a fat burning state). The body has the capability and mechanisms for fueling itself without relying on you to eat carbs.
Eating 20-30 grams of total carbohydrate per day is enough to trigger nutritional ketosis, produce your brain's daily requirement for glucose in the process, and keep most people satisfied with their diet.
Keeping carbohydrate under 25 grams for (most) women is essential for triggering your body to run on fat for fuel.
The body does have a daily minimum requirement for protein. This will vary depending on how active you are, how much muscle currently have, and if you are trying to build muscle. If you don't eat at least 30 grams of protein a day, your body will cannibalize the muscle you already have on your body in order to fuel its daily needs. So, you want to eat enough protein daily so that you don't lose muscle.
- To maintain muscle, leave protein ratio between 0.69 to 0.8. It is not recommended to drop below 0.69 or muscle loss may occur. Maintain my muscle is very important to me, so I personally use .9 to calculate my protein requirement.
- To gain muscle, the protein ratio should be between 0.8 to 1.2.
You can find your lean body mass by using a scale that will tell you your body fat percentage. If you don't have a scale, you can guess by comparing how your body looks to these examples.
making your macros work
Following your macros is THE KEY to successful weight loss with keto, but they are completely useless unless you track and log your food intake daily in a food tracking app like My Fitness Pal to determine how what you are actually consuming daily matches up with your macro goals. Now that you know your macros, let's set up your weight loss goal in My Fitness Pal using your macros.