Back to the Basics: Calories
There’s so much noise out there about food: counting this, cutting that, skipping meals, eating “clean.” No wonder eating can feel more stressful than satisfying! But here’s the truth: at the heart of all nutrition advice is one simple concept — energy balance.
So today, we’re going back to the basics to talk about calories what they are, why they matter, and how to use them to build balanced, nourishing meals that keep you energized and thriving.
What Is a Calorie, Really?
A calorie is simply a unit used to measure the energy we get from food. Calories are the fuel that power every function in your body, from breathing to brain power.
Think of calories like your body’s currency. You “spend” them on movement, digestion, and daily life, and you “earn” them through food and drink.
We’ve all heard the saying “Calories in, Calories out.”, but the truth is, that isn’t the whole story. Sure, energy balance matters, but your body isn’t a simple calculator. Hormones, sleep, stress, and even the types of foods you eat all play a role in how efficiently you use energy.
The source of calories (carbs, fats, and protein) differ in how much energy they provide.
Here’s the breakdown:
Carbs and protein hold the same energy value, even though they both serve different purposes for nourishing our body.
Fats (and alcohol) have the highest energy value because they have a structure that is full of energy.
Why is this important? It helps us to understand how our bodies use the energy we give it based on what and how much we eat/drink.
Why Calories Matter for Your Health
Calories give your body the energy it needs to thrive, not just survive.
We get calories by eating food and drinking beverages that have calories. By doing so, we give our bodies energy to function. Just like your phone needs a charge or your car needs gas, your body needs calories to keep you running smoothly.
Too many or too few can throw off your body’s balance:
- Too many calories: your body stores extra energy for later (hello, fat cells).
- Too few calories: your body goes into conservation mode, slowing metabolism, stealing energy from muscle, and making you feel sluggish.
The goal isn’t to count every bite, it’s to give your body enough energy to function well and feel good.
How Many Calories Do You Need?
We’ve all googled it: “How many calories should I eat?” But here’s the thing: no online calculator can know you like you do.
Your needs depend on factors like:
- Age
- Sex assigned at birth
- Height & body composition
- Physical activity
- Health status
Signs You Might Not Be Eating Enough
Over time, an imbalance in how much energy we give our bodies can cause health concerns like:
- Fatigue or brain fog
- Feeling cold often
- Loss of menstrual cycle
- Irritability or trouble focusing
Dietitian Tip: The general recommendation for adults is around 2,000 calories per day, but that’s just an average starting point, not a rule. What matters most is how your body responds to the energy you give it. Some people need a little more, and some a little less. Listen to your hunger, fullness, and energy levels over the numbers.
Grab your free Balanced Plate Guide — a printable resource to help you plan balanced meals that nourish your body and support lasting energy (without the calorie math).
[Download the Balanced Plate Guide here]
At the end of the day, the purpose of calories are for nourishing our bodies with enough energy, regardless of how we get them.
So, go ahead and fuel your body well, one plate at a time.
As always take good care and live well nourished.