You’re eating clean. You’re working out. You’re getting your steps in. And still… you’re exhausted. At a certain point, the question isn’t “what am I missing?” It’s “What am I overlooking?” Because, from a functional nutrition lens, energy issues are rarely random. They’re usually a reflection of how well your foundations are actually working.
Before Hormones, Consider This:
Before we talk supplements or hormones, I ask my clients these questions:
How long after waking are you eating?
Are you waiting hours, running on coffee, doing a fasted workout, and then wondering why you crash later?
Are you getting morning sunlight within 60 minutes of waking?
Or is your first light exposure your phone screen, followed by your inbox?
Are you going too long between meals?
Because even “healthy” undereating or spacing meals too far apart can create low, unstable energy.
Are your meals actually anchored?
Or are they light, snacky, and missing enough protein and fiber to keep you steady?
Are you ever truly in a parasympathetic state?
Or are you eating, working, scrolling, and living in constant low-grade “go mode”?
Because you can check all the “wellness” boxes… and still be missing the things that actually regulate energy.
Let’s Start Here: Blood Sugar
You may think your blood sugar isn’t a problem because you eat a healthy diet. However, it’s not just the food we’re eating; it’s also a lot of what foods we’re pairing together and how we’re preparing them.
For example, starting your day off with a fasted workout or coffee before breakfast can signal stress to your body, altering blood sugar levels.
Ok, that may not be new news. But, did you know that your morning smoothie or oatmeal could also be spiking your blood sugar if there’s too much fruit or carbohydrate and not enough fiber and protein? It’s not just the foods you eat, but how you pair them that’s key.
Maybe it’s not even what you’re eating… it’s how you’re eating it. If you’re going too long between meals or grazing throughout the day, your blood sugar won’t respond well.
Alternatively, if you’re eating “on the go,” when your body is in “fight or flight,” this can also alter blood sugar metabolism.
These combinations quietly drive:
- Energy dips
- Brain fog
- Cravings
- That “tired but wired” feeling
If this is you, here’s where to start:
- Aim to eat within ~60 minutes of waking.
- Try to get in 20-30 grams of protein and 5-10 grams of fiber.
- If you need to eat something lighter before a workout, that’s ok but still aim to get a bit of protein and healthy fats in there.
- Create a meal structure throughout the day so you’re eating every 3-4 hours, and build your plate with protein and fiber first.
- Stable blood sugar = stable energy. It’s that foundational.
Next Up: Your Circadian Rhythm (a.k.a your body’s internal clock)
This is one of those things that you’ve probably seen trending on social media that sounds “wellness-y”… but it’s actually deeply physiological.
If you’ve heard or follow Dr.Huberman, he’s a huge proponent of supporting your body’s circadian rhythm, and I totally understand why!
You can be getting enough sleep on paper and still feel off if your body isn’t anchored to a consistent rhythm.
So, I ask my clients the following to learn more:
Are you getting morning sunlight within 60 minutes of waking?
Or is your first light exposure on your phone, and then you don’t get outside until noon?
Do you usually go to bed and wake up at the same time?
Or do you go with the flow, get hung up watching your favorite TV show, and then snooze your alarm until the last minute?
Do you dim the lights at night, wear blue-light glasses, and escape from technology?
Or do you keep the overhead lights on and sink into the couch while scrolling on TikTok?
All of these things deeply impact your circadian rhythm, aka your body’s 24-hour clock. When this is in sync with sunrise and sunset and your body is in a routine, both sleep and energy improve.
What this can look like:
- Step outside within 60 minutes of waking, even for 5-10 minutes.
- Open your windows right away (it won’t work through a closed one)
- Keep sleep and wake times relatively consistent
- Dim the lights at night and turn on “night shift” on your devices
- When you’re in the “reset” mode, aim to see the sunrise and sunset as much as you can
It’s simple, but it’s one of the fastest ways to shift energy. While you don’t have to be perfect, consistency goes a long way here, and I promise your body will thank you!
Nutrient Status As An Indicator
You can be eating a “really healthy” diet and still come up short here. As a Dietitian, I even supplement my diet as it feels nearly impossible to get it all through food.
Three labs I almost always look at when someone says they’re exhausted:
Iron + Ferritin (iron storage)
This impacts how well your body can carry oxygen, which directly affects energy production.
Vitamin D
This plays a role in mood, immune signaling, and overall vitality.
When these are low or even suboptimal, it’s not always dramatic. It’s more like… everything just feels harder than it should (think: afternoon crashes and slower workout recovery).
Especially if you’re dealing with brain fog or low focus. This supports energy at a cellular level.
Where to start:
Test, don’t guess, and supplement as needed. This is one of those areas where data really matters.
Another Big One, Your Nervous System
This is the piece most people skip, and also the thing that tends to improve it all.
You can be doing everything “right,” but if your body is constantly in a low-grade state of stress, it changes how you produce and use energy.
And that impacts:
- Sleep quality
- Digestion and Gut Health
- Metabolism
- Hormone signaling
- Energy output
So I’ll ask clients:
Do you ever actually feel relaxed in your body?
Do you take time to unwind?
How do you support your nervous system?
What’s your calendar look like?
But in all honesty, these are formalities. Everyone can benefit from nervous system support, yet 95% of us neglect it.
Where to start:
- Eat without distractions when you can (no phone, no tv, just a moment to pause)
- Take 5 Deep Belly Breaths whenever you feel stress come on
- Find a nervous system practice that works for you: meditation, breathwork, reading, painting, etc.
- Find pockets in the day for a reset – maybe it’s a quick walk around the block, listening to nature
If you’re still asking, “Why am I so tired?”…This is where I Look Next
Ok, so you checked off the boxes above and built the foundation, but something still feels off. This is where a bit more data can help.
A few things I’ll typically look at:
A full thyroid panel
Not just TSH. Energy is tightly tied to metabolic function. (Think: T3, T4, Free T3, T4, Reverse T3, TPO, TpAb)
Blood sugar markers
Fasting glucose, insulin, or A1C to confirm what we’re seeing day to day.
Cortisol rhythm (when needed)
If you feel exhausted in the morning but wired at night, this can give insight into your daily rhythm. A DUTCH Hormone test can help with this.
By running these labs and focusing on the foundations listed above, you can better understand where your body needs support and how it all comes together. Most fatigue isn’t one big issue; it’s a few small things… all pulling in the same direction.
In short, energy isn’t just about doing more. Sometimes it’s about supporting your body in the right places so it can function optimally.
