Depression can feel confusing and isolating, especially when symptoms blur with everyday stress or fatigue.
In this article, you’ll learn about causes and contributors to depression (such as stress, hormones, sleep, and medical factors), common signs, and safe, evidence-based options for support.
What Is Depression?
Depression (major depressive disorder) is a mood condition that goes beyond temporary sadness. It can cause lasting feelings of emptiness, hopelessness, and loss of interest in daily activities. [1]
Depression is not just in your head. It can affect your whole life.
- Body: you might feel worn out, have body aches, sleep too much or too little, or notice changes in your appetite.
- Thinking: it may be hard for you to focus, make choices, or remember things.
- Daily life: you may pull away from people or find work and home tasks harder.
A depressive episode can last weeks or months. Without help, it can return or get worse.
But depression is manageable. Getting support early, like talking with a professional or someone you trust, can make a real difference.
Why Does Depression Happen?
There are many factors that can contribute to causing or worsening depression; here are some of them:
Brain & Stress Systems
Depression isn’t just feeling sad. It often begins deep in the body, in a system called the Neuroaffect Circuit. This circuit links your brain, nervous system, and gut.
When stress sticks around for too long, it can throw this system off and may contribute to depression. [2]
Here’s how that happens:
- Your Stress Response Gets Stuck. Your body is made to handle short periods of stress, not pressure all the time. It’s hard for your nervous system to calm down when you’re always on edge.
- Sleep and Energy Get Disrupted. Stress messes with your body clock. You might have trouble going to sleep or feel tired when you wake up. Over time, not getting enough sleep can make you less motivated and energetic.
- Mood Chemicals Drop. Chronic stress affects brain chemicals like serotonin and dopamine, which help you feel calm, focused, and balanced. When these chemicals drop, you may feel more anxious, numb, or depressed.
- Your Gut Stops Supporting Your Brain. Stress also affects your gut health, which plays a significant role in your mood. An unhealthy gut can raise inflammation and worsen symptoms like fatigue, brain fog, and emotional ups and downs.
- Negative Feedback Loop. When sleep suffers, stress rises. When your gut is off, your brain feels it. Low mood leads to less activity, which makes everything harder. These cycles are what make you feel so stuck.
Life Events & Environment
Depression can happen after a traumatic event, loss of a loved one, relationship problems, feeling isolated, problems at work or with money, or big changes in your life or identity.
Having friends and family around can help protect you from depression. When people’s support decreases, the chance of getting depressed goes up. [3]
Getting back in touch with people, even if it’s just one trustworthy person, can help you feel better.
Biology Link
- Thyroid: Hypothyroidism, or low thyroid activity, may leave you feeling tired or depressed, and can cause weight changes.
- Iron, Vitamin B12, and Folate: Deficiencies can cause anemia or impair neurotransmitter synthesis, showing up as low energy, brain fog, and mood changes. [4]
- Chronic, Low-Grade Inflammation: When the immune system stays mildly activated, it can alter neurotransmitter function and motivation. [5]
Hormones & Life Stage
Shifts in hormones can change mood circuits and stress responses.
Perimenopause: Fluctuating estrogen and progesterone can disturb sleep, increase anxiety, and lower mood.- Postpartum: Steep hormonal changes, sleep loss, and identity shifts can trigger depression beyond “baby blues.” [6]
- Men’s hormone changes: Age-related testosterone decline or medical factors can affect drive, energy, and mood. [7]
Sleep & Circadian Rhythm
Your body clock follows light. When your sleep and wake times change a lot, when you use screens late at night, or when you miss morning light, your body clock can get off track. This can affect your mood and energy.
Small habits can help: go to bed and wake up at about the same time every day, lower screen use in the evening, and get a bit of morning light.
Medications & Substances
Some prescription medications list depression or fatigue as potential side effects.
Alcohol, cannabis, and other substances can initially feel calming but may worsen sleep quality, lower next-day mood, or increase anxiety over time.
Safety Note: Never stop a prescription on your own; discuss options with your clinician.
Symptoms and Warning Signs of Depression
If you’ve been wondering whether what you feel could be depression, here’s a simple list of some of the symptoms.
If several of these happen most days for two weeks or more, it’s worth seeking help:
- Persistent sadness, emptiness, or hopelessness
- Loss of interest or joy in daily activities
- Sleep problems (too little or too much)
- Fatigue or slowed movement/thinking
- Appetite or weight changes
- Trouble focusing, remembering, or making decisions
- Irritability, anxiety, or restlessness
- Physical complaints (headaches, gut upset, aches)
- Thoughts of death or suicide
Special Considerations by Age & Stage
- Children/teens often show irritability, withdrawal, poor school performance, or risky behavior. [8]
- Older adults are more likely to report body aches [9], memory issues, or loss of interest in leaving home.
- Postpartum/perinatal women can experience mood swings, anxiety, or persistent sadness beyond normal newborn exhaustion.
When to Seek Professional Help
Reach out if:
- Symptoms last 2 weeks or more.
- Mood changes interfere with work, school, or relationships.
- You have thoughts of self-harm or suicide.
Call 911 or your local emergency number and get help right away.
You can also reach out in other ways that are safe and immediate:
- In the U.S., call or text 988 to connect with the Suicide & Crisis Lifeline. It’s free, confidential, and available anytime.
- Call your doctor or a therapist if you have one.
- Talk to someone you trust.
It’s not weak to ask for help; it’s human. Asking for help is actually one of the bravest things you can do. And there are people out there who genuinely want to help you through it.
What Can You Do About Depression?
Start with small, steady steps. Each one builds momentum.
Foundational Care
- Sleep & Light: Go to bed and wake up around the same time each day. Get 10–15 minutes of outdoor light within an hour of waking. Dim screens in the evening to signal to your body that it’s time to rest.
- Movement: Begin with short walks. Gradually aim for 90–150 minutes of moderate activity per week. What matters is regularity, not intensity.
Nutrition: Eat balanced meals that include protein, fiber, and healthy fats. Add omega-3-rich foods like salmon, walnuts, or flaxseeds for brain support.- Stress Skills: Take 5 to 10 minutes each day to do things that help you relax, such as breathing, journaling, meditating, or praying.
- Connection: Choose one supportive person and set a weekly touchpoint—a call, coffee, or walk together.
Psychotherapy
Talking therapies are highly effective. Options include:
- Cognitive Behavioral Therapy (CBT): helps individuals reframe negative thinking and develop new coping skills.
- Behavioral Activation: gradually re-engages in enjoyable activities.
- Interpersonal Therapy: improves relationships and communication.
Medications
Antidepressants can help rebalance brain chemistry: [10]
- SSRIs (like sertraline, fluoxetine)
- SNRIs (like venlafaxine, duloxetine)
- Other options (like bupropion or mirtazapine)
They usually take a few weeks to really start working, so give it time. Sometimes it takes a few tries to find a medication and dose that works for you.
And if you ever want to stop taking them, don’t quit all at once. You’ll need to gradually lower the dose with your doctor’s guidance to avoid withdrawal symptoms or a sudden crash.
Supportive Supplements
Supplements can be supportive for select people, especially when lab results show specific gaps. But they’re not a replacement for professional care or safety planning.
Common options include:
Omega-3s
These healthy fats are linked to brain health and may help with mood balance. Omega Max is made with a highly absorbable fish oil (MaxSimil®), so your body can actually use what you’re taking, including EPA, DHA, and DPA, all known for their anti-inflammatory and cognitive support benefits.
Vitamin D
Many people with depression have low vitamin D levels, especially in winter or if they don’t get much sun [11]. D3K2 combines vitamin D3 with K2 and calcium to help your body absorb and use it properly. It also includes BioPerine® for better absorption.
Iron, B12, and Folate
Low levels of these nutrients can drain your energy and leave you feeling foggy, fatigued, or worn out. These nutrients support red blood cell production, healthy oxygen delivery, and overall nervous system function.
Choosing gentle, well-absorbed forms of iron and B vitamins can help support energy and replenish low levels without causing common digestive discomfort that some iron products may trigger.
Magnesium
Magnesium may help you sleep better, deal with stress, and relax your muscles.
Mag Three combines three types of magnesium that work together to help your body relax and feel better.
5-HTP (avoid with SSRIs)
As a direct serotonin precursor, 5-HTP may help support mood balance, ease stress-related ups and downs, and promote more restful sleep. Because it can raise serotonin, it shouldn’t be combined with SSRIs or other serotonergic medications. Always check with your healthcare provider first.
HTPro uses a thoughtfully dosed 5-HTP to gently support your body’s own serotonin pathway, helping you cultivate emotional steadiness and a sense of well-being.
SAMe
S-adenosyl-L-methionine (SAMe) plays a role in methylation and helps your body make and regulate neurotransmitters involved in mood, focus, and energy. For some, optimizing SAMe status can support a more positive outlook and mental clarity.
Sameplex combines SAMe with vitamin B12 plus broccoli flower and dandelion root. This trio is designed to support methylation, gentle detox support, and overall vitality, while B12 helps with red blood cell formation and nervous system function.
Safety Note:
Supplements may interact with medications and may not be safe during pregnancy without advice from a doctor. Talk to your healthcare provider to adjust your choices and dosages.
Functional Testing for Depression: Looking Deeper Into the Condition
Sometimes, your mood doesn’t get better even though you’re doing everything right, like getting more sleep, eating well, and trying to stay positive. When that happens, it’s worth asking why.
Functional testing gives us clues about what’s happening inside your body: your gut health, hormones, neurotransmitters, and nutrient levels.
Here are some functional tests offered at the Lam Clinic:
1. Gut–Brain Connection and Comprehensive Stool Testing
Most people don’t know that about 90% of serotonin (the chemical that helps you feel calm and happy) comes from your gut.
When the gut isn’t healthy, serotonin production can slow down, leaving you tired, foggy, or just “off.” So, before we focus only on the brain, we look at what’s happening in the digestive system. A healthy gut often leads to a healthier mind.
We use comprehensive stool panels to explore this connection. These tests map out all your gut microbiome, including parasites, viruses, good bacteria, bad bacteria, and yeast. It also checks digestive enzymes, inflammatory markers, immune responses, and leaky gut antibodies.
When your gut is healthy, it absorbs nutrients better, reduces inflammation, and provides your brain with the materials it needs to produce serotonin and other mood-related chemicals.
2. Neurotransmitter and Stress Hormone Testing
Your mood depends on a delicate mix of calming and energizing brain chemicals. Our neurotransmitter and cortisol rhythm testing can help reveal whether stress, exhaustion, or nutrient depletion is disrupting that mix.
You can test for neurotransmitters like epinephrine, norepinephrine, serotonin, GABA, glutamate, and dopamine in urine test kits. In addition, you can look at your adrenal health with saliva cortisol tests. Results may indicate how your brain and adrenal glands respond to stress.
If serotonin or GABA is low, you might have a depressed mood or feel flat. If norepinephrine, epinephrine, or dopamine is elevated, you might have underlying anxiousness. If cortisol is too low or doesn’t follow a normal rhythm, that could mean your adrenals are struggling.
Often, the best way to bring these back in line is by healing the gut, rebalancing nutrients, and giving the adrenals time to recover.
3. Hormone Panels
Mood is closely tied to the hormones your body runs on. That’s why we often look at:
- Cortisol: Adrenal rhythm and inflammation
- Progesterone: Mood and sleep quality
- Estrogen: Energy, cognition, and balance
- DHEA: Resilience and vitality
- Testosterone: Drive, focus, and motivation
- Ratio Pg/E2: A measure of hormonal balance in women
- Nutrients like low iron, B12, folate, vitamin D, or magnesium can also make you feel tired and down.
Simple testing can reveal those gaps, allowing us to correct them safely and effectively.
4. Genetic SNP Testing
In more complex or long-standing cases, genetic SNP testing can show how your body handles nutrients, detoxification, or neurotransmitter metabolism.
This isn’t about identifying depression; it’s about seeing where extra nutritional support might help your system run more smoothly.
How the Right Clinic Can Help
At Lam Clinic, we believe depression care should be personalized and integrative.
- Natural care first: We start with natural, low-risk options first. We look at sleep, nutrition, movement, stress tools, and targeted supplements. If medication is the right choice, we use it carefully and check in often.
- Targeted testing: When it’s beneficial, we check for hidden causes by looking at hormones, the thyroid, nutrition, or inflammation.
- Therapeutic support: We personalize care, from advice on supplements and nutrition to IV nutrient therapy when needed.
- Medication support and lowering doses: If you are already on psychiatric meds, we can help you lower the dose slowly when it is appropriate. We adjust the pace to how you feel and work with your prescribing clinician so you are supported the whole way.
Conclusion
Depression can make daily life feel challenging, but it doesn’t have to stay that way. With the right support, recovery is possible, and you can begin to feel like yourself again.
At Lam Clinic, we are here to listen and support you. Together, we can create a plan that helps your health and gives you hope. If you are ready, please reach out today. You don’t have to go through this alone.
