First–what are macronutrients? Macro means “large” so macronutrients are large nutrients.
There are three basic components of every diet and they are carbohydrates, fat, and protein. You can also include a fourth one which is water. We need large amounts of the three basic components in our diet to keep our bodies well and to keep them going–energy, metabolism, and bodily functions. We need carbohydrates to keep our brain (which is why people on the Keto diet get brain fog) and muscles working.
We need fats–and it’s best when it comes to fat to eat unsaturated plant-based fat(nuts, avocadoes, and olive oil) mostly and only some times consume fats like butter and cream. Healthy fat helps you to absorb the vitamins in your food. Again–concerning the Keto diet, and likely why everyone I know who has ever been on it gained back + weight soon as they went off of it–the fats that are recommended with this diet are all the wrong fats. There isn’t a plant-based fat among the fats listed that keto dieters are to include in their diets. The list includes butter, ghee, meat, high fat cheese, cream, and eggs.
Protein breaks down in your gut into amino acids which help to repair tissues like muscle and skin. Amino acids are also used for making essential hormones and enzymes in our body that support our immune system.
If you are about to try dieting, regardless of which one, please see a nutritionist–if even for a consultation (some are free) and learn about basic nutrition. I am not a nutritionist but I have studied nutrition from the very basic roots (science, biology, anatomy) of it to just about everything in our present day food chain and would not go on a diet, or drink some magic elixir sold through social media, without consulting a nutritionist and talking with my physician or naturopath or both. Also, it doesn’t hurt to start a conversation with the farmer who grows your food, or someone selling what they’ve grown at a local Farmer’s Market, and even a local chef. You will be very surprised and forever grateful for what many of them can teach you about nutrition. Everyone’s body is different and everyone’s physical health–immune system, metabolism, organ health, skin, and bodily functions are completely different from everyone else’s. I know the ads, pics, profiles, and sales pitches can be pretty convincing but remember you aren’t seeing everything going on behind the scenes. Everyone I know that has gone on some fad diet also worked out a lot. The second they couldn’t work out they started feeling fatigued, sore and achy muscles, and the weight started coming back. When you reduce one macronutrient and increase another there are consequences. Many people I know drinking magic elixirs also spend an unusual amount of time in the restroom. While others are constantly crashing from the protein powders and drinks and supplementing with large doses of caffeine. Have some people benefitted from fad dieting and magic elixirs? Maybe? But remember they are doing way more than just drinking juice or having butter/ghee in their morning coffee. There are gym memberships, enzymes, supplements, vitamins, energy drinks, regular running/walking/jogging and often times an income (from selling said supplements/books/gym memberships) and so much more behind their weight loss. Ok lecture over and back to macronutrients!
Second—how do I get them? Through the food in your diet.
Third-what do they do? Macronutrients help us grow, heal, repair, and they give us energy.
Macro Calculator-free macro calculator from Transparent Labs here
Macro Diets– Counting macros–a wonderful article and recipes at Cooking Light here
Macronutrient recommended %– 45-60% of your daily calories from carbs, 20-35% from fat, and 10-35% from protein. Source