In This Article
A quick guide to the four root causes behind many chronic symptoms, and how to know where to start.
Jump to the section that sounds most like you:
- Stress Physiology: when your body is stuck in stress mode
- Inflammation: when your immune system stays switched on
- Oxidative Stress: when your cells’ protection can’t keep up
- Hormone Dysregulation: when your hormones are out of balance
- How the four root causes connect
- Where to start, and which program may fit you best
Have you ever wondered why you can do everything “right” and still not feel like yourself?
Maybe your lab work looks normal, but you are exhausted. Maybe you are eating well, exercising, and taking supplements, yet you still struggle with digestive issues, hormone symptoms, poor sleep, brain fog, or difficulty maintaining a healthy weight.
This is where functional medicine takes a different approach.
Instead of simply asking, “What diagnosis does this person have?” we also ask the more important question:
“Why is this happening in the first place?”
At Best Life Functional Medicine, we believe that looking beneath the surface can help us understand the patterns contributing to chronic symptoms and disease.
While there are many factors that influence health, our approach, the Best Life Method, focuses on four major root causes of chronic symptoms throughout the body:
- Stress Physiology (how your body handles stress)
- Inflammation (when your immune system stays switched on)
- Oxidative Stress (wear and tear on your cells)
- Hormone Dysregulation (when your hormones are out of balance)
These four areas are connected. When one gets out of balance, it can put extra strain on the others, creating a cycle that makes it hard for your body to get back to balance.
Let’s take a closer look.
1. Stress Physiology: When the Body Is Stuck in Stress Mode
Stress is a normal part of life.
Your body is designed to respond to it and then return to a state of rest and recovery.
Problems can start when stress becomes chronic, or when you face more stress than your body can recover from. Your stress response is run by a communication system between your brain and your adrenal glands, often called the HPA axis.
Your adrenal glands, two small glands that sit on top of your kidneys, play a key role here. The hormones they make help your body respond to stress and keep your energy and blood pressure steady.
You can think of the HPA axis as your body’s alarm system. When your brain senses a threat, your adrenal glands release adrenaline, which raises your heart rate and alertness within seconds, and cortisol, which raises your blood sugar to give you energy.
This is helpful when you need to react quickly, like stepping out of the way of a swerving car.
But your body can’t always tell real danger from deadlines, poor sleep, or blood sugar swings, and it wasn’t designed to stay on high alert all day, every day.
What Can Drive the Stress Response?
Stress is not limited to emotional stress.
Your body responds to the total amount of stress it is experiencing, which can include:
- Emotional stress
- Poor sleep
- Under-eating or inadequate nutrition
- Excessive exercise
- Illness or infection
- Blood sugar fluctuations
- Digestive issues
- Environmental stressors
- Work and relationship stress
- Major life changes
When these stressors continue without enough recovery, your stress response can get stuck in the “on” position.
Over time, this may contribute to symptoms such as:
- Fatigue and low energy
- Feeling “tired but wired”
- Difficulty falling or staying asleep
- Energy crashes at certain times of day
- Difficulty recovering from exercise
- Digestive changes
- Changes in appetite
- Hormonal changes
- Brain fog
- Difficulty handling additional stress
It’s tempting to think of your adrenals as simply “working” or “not working.” It’s usually more helpful to look at your whole stress response and how well your body is adapting to what’s being asked of it.
That’s why stress is about more than feeling overwhelmed. Your body is always reacting to what’s happening around you, like work and relationships, and within you, like sleep, blood sugar, and inflammation.
The goal isn’t to remove every source of stress, because that isn’t possible. The goal is to build resilience: helping your body handle stress better and making sure it gets enough time to recover.
Feeling stuck in stress mode?
Our Energy Accelerator Deep Dive focuses on helping your body handle stress better and recover.
2. Inflammation: When the Fire Stays Lit
Inflammation is a normal and necessary part of how your body defends and heals itself.
For example, when you sprain an ankle, the redness and swelling are signs of inflammation at work. Your immune system sends extra blood flow and repair cells to the area to start healing the damage.
The problem starts when inflammation becomes chronic.
Instead of switching on when needed and then calming down, your immune system keeps sending out “alarm” signals. Over time, this low-level, ongoing inflammation can put stress on your tissues.
Chronic inflammation doesn’t always look like redness and swelling. It may show up as:
- Joint pain or stiffness
- Muscle aches
- Bloating or other digestive issues
- Skin issues, like rashes, acne, or eczema flares
- Puffiness or fluid retention
- Fatigue
- Brain fog
Many things can affect inflammation, including diet, gut health, infections, environmental toxins, poor sleep, stress, and blood sugar or metabolic problems.
Your Gut Plays an Especially Important Role
Your digestive tract is home to trillions of bacteria and other microbes, called your microbiome, that constantly interact with your immune system. Your gut lining also acts as a barrier, letting nutrients in while keeping unwanted substances out. When your microbiome or gut lining is disrupted, it may trigger inflammation throughout your body.
Chronic inflammation has been linked to many health conditions, so finding where it’s coming from can be an important part of a root cause approach.
Rather than simply asking, “How do we manage inflammation?”
We ask: “What may be causing the inflammation in the first place?”
Our Gut Restoration Deep Dive is built around that question, starting with one of the most common sources: your gut.
3. Oxidative Stress: When Your Body’s Protection Can’t Keep Up
Every cell in your body needs energy to do its job.
Much of that energy is made by your mitochondria, tiny “power plants” inside your cells. Making energy naturally gives off byproducts called reactive oxygen species, sometimes called free radicals. You can think of them like the exhaust a car’s engine gives off.
These molecules aren’t automatically harmful. In small amounts, they help your cells communicate and help your immune system fight infection.
Your body also has its own antioxidant defenses that keep these molecules in check.
Oxidative stress happens when your body produces more of these reactive molecules than it can neutralize. You can think of it as a balance: on one side is the wear and tear on your cells, and on the other is your body’s ability to protect and repair itself.
Things that can tip this balance include environmental toxins, poor nutrition, chronic inflammation, blood sugar or metabolic problems, too much alcohol, smoking, and other ongoing stress on the body.
When oxidative stress continues over time, it can damage cells and may play a role in the processes behind chronic disease.
Oxidative stress doesn’t cause one clear set of symptoms, but it may play a role in:
- Fatigue and low energy
- Slow recovery from exercise or illness
- Brain fog
- Signs of faster aging, like skin changes
That’s why supporting your antioxidant defenses is about more than taking an antioxidant supplement.
It starts with the basics:
- Eating a nutrient-dense diet
- Eating a variety of colorful fruits and vegetables, which are natural sources of antioxidants
- Getting enough protein and essential nutrients
- Supporting your body’s natural detox pathways, mainly your liver, kidneys, and gut
- Getting enough sleep
- Managing chronic stress
- Cutting down on unnecessary exposure to chemicals and pollutants
The goal is to give your body the resources it needs to protect itself, repair, and work at its best.
Want to give your cells more support?
Mito Boost focuses on your mitochondria and your body’s natural antioxidant defenses.
4. Hormone Dysregulation: More Than Just Your Sex Hormones
Hormones are chemical messengers. They travel through your bloodstream and help coordinate nearly every major system in your body.
They affect your energy, metabolism, blood sugar, reproductive health, sleep, mood, appetite, and how you respond to stress.
Hormones also don’t work alone. A change in one often affects others.
Two important groups we look at are metabolic hormones, such as insulin, and sex hormones, including estrogen, progesterone, and testosterone.
Insulin and Metabolic Health
Insulin is a hormone made by your pancreas. It works like a key, unlocking your cells so glucose (sugar) can move out of your bloodstream and into your cells, where it’s used for energy.
When your cells stop responding well to insulin, your pancreas has to make more of it to keep your blood sugar normal. This is called insulin resistance.
Importantly, metabolic problems can start long before your blood sugar is noticeably high. Your blood sugar can come back “normal” on a standard lab test while your body is working harder behind the scenes to keep it there.
Over time, insulin resistance affects more than blood sugar. It can also influence inflammation, body composition (how much muscle and fat you carry), energy, and hormone balance.
That’s why looking at metabolic health can help explain hormone symptoms.
Sex Hormones
Estrogen, progesterone, and testosterone play important roles in both women and men.
For women, hormone changes become especially important around and after menopause. Lower levels of estrogen, progesterone, and testosterone can affect more than reproductive health. They can also affect sleep, mood, energy, muscle mass, body composition, and overall well-being.
But hormone health is about more than your hormone levels. We also look at how your body makes, processes, and clears hormones, which depends heavily on your liver and gut.
Hormone imbalances may show up as:
- Irregular, heavy, or painful periods
- PMS
- Hot flashes or night sweats
- Low libido
- Weight gain, especially around the middle
- Energy crashes or cravings after meals
- Mood changes, anxiety, or irritability
- Trouble sleeping
Hormone health is closely connected to metabolic health, stress, inflammation, gut health, and detoxification.
That’s why the bigger picture matters. Rather than focusing on one hormone or one symptom, we want to understand how your hormones interact with the rest of your body and what may be driving the changes you’re feeling.
If your hormones feel out of sync, Hormone Mastery takes a closer look at both your metabolic and sex hormones and how they connect to the rest of your body.
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How the Root Causes of Chronic Symptoms Connect
These four areas aren’t separate boxes.
They influence one another, and one can set off the next:
- Chronic stress can disrupt your sleep, digestion, and hormones.
- An unhealthy gut can fuel inflammation, which can then increase oxidative stress.
- Insulin resistance can add to inflammation and throw off other hormones.
And the cycle can continue.
That’s why treating one symptom on its own may not create lasting change. Your body is an interconnected system, and when you address the underlying patterns, you can begin to change the environment those symptoms come from.
So Where Do You Start?
You don’t need to change everything at once. In fact, trying can feel overwhelming and make it hard to know what’s actually helping.
In functional medicine, the goal is to understand your unique health picture and identify where your body may need the most support.
- Sometimes that means starting with your stress response.
- Sometimes the gut is the biggest piece of the puzzle.
- Sometimes your hormones need attention.
- And sometimes several systems need to be addressed together.
Every program at Best Life Functional Medicine is built on the Best Life Method and these four root causes.
Our 12-month Root Cause Resolution Program works through all four, with one phase dedicated to each.
If you already have a good idea of where your biggest concerns are, our four Deep Dive programs let you focus on one area at a time:
- Energy Accelerator (stress physiology): for fatigue, poor sleep, and feeling stuck in stress mode
- Gut Restoration (inflammation): for gut issues, aches, and inflammation you can’t seem to calm down
- Mito Boost (oxidative stress): for supporting your cells’ energy, protection, and repair
- Hormone Mastery (hormone dysregulation): for blood sugar, metabolism, and sex hormone changes
The goal isn’t simply to put a band-aid over a symptom. It’s to understand why your body is struggling and give it the support it needs to move toward better function.
Because feeling “normal” isn’t necessarily the same thing as feeling your best. Your body is constantly communicating with you. The question is: Are you listening?
Not sure where to start?
Whether it’s Deep Dives or Root Cause Resolution, we’ll help you find the right fit for your body and your goals.
This article is for educational purposes only and is not a substitute for medical advice. Talk with your healthcare provider before making changes to your health care.
