If you've typed "why am I always tired" into a search bar more than once this month, you're far from alone. Persistent fatigue is one of the most common reasons people in Los Angeles bring up concerns with their doctor — and one of the most frustrating to sort out, because "tired" can mean a dozen different things depending on what's actually going on underneath it.
This article walks through the most common reasons people experience ongoing fatigue, what standard medical workups typically check, and where functional lab testing may add useful information. The goal isn't to hand you a diagnosis — only a licensed healthcare provider can do that — but to help you understand your options before your next appointment or consultation.
Common Reasons People Feel Tired All the Time
Fatigue is a symptom, not a diagnosis, and it can stem from several overlapping categories.
Sleep Quality and Quantity
Not getting enough sleep is the obvious culprit, but sleep quality matters just as much as duration. Conditions like sleep apnea, restless leg syndrome, or simply irregular sleep schedules — common in a city where long commutes and late work hours are the norm — can leave someone technically "in bed" for eight hours but still waking up exhausted.
Nutritional and Mineral Factors
Low iron, vitamin D, B12, or broader mineral imbalances are frequently discussed in relation to low energy. Standard blood panels check some of these markers, but not always all of them, and reference ranges used to flag "normal" don't always reflect what feels optimal for an individual. This is one reason some people continue to feel fatigued even after a standard panel comes back "normal."
Hormonal Changes
Thyroid function, cortisol patterns, and reproductive hormones (estrogen, progesterone, testosterone) all influence energy levels. Hormonal shifts — such as those associated with perimenopause, andropause, or chronic stress — are a common but sometimes overlooked contributor to daytime fatigue.
Chronic Stress and Nervous System Load
Ongoing psychological or physical stress can affect energy regulation over time. This is an area of ongoing research, and while terms like "adrenal fatigue" are used colloquially, it's worth noting that this specific label is not a recognized clinical diagnosis in conventional endocrinology — the underlying experience of stress-related exhaustion, however, is real and worth discussing with a provider.
Underlying Medical Conditions
Fatigue can also be a sign of conditions such as anemia, thyroid disorders, diabetes, depression, autoimmune disease, or sleep disorders. Persistent, unexplained fatigue — especially when paired with other symptoms like unexplained weight change, chest pain, or shortness of breath — should always be evaluated by a physician promptly, since some causes require timely medical treatment.
What Standard Bloodwork Typically Covers — and What It May Miss
A routine physical often includes a complete blood count (CBC), basic metabolic panel, and sometimes a thyroid-stimulating hormone (TSH) test. These are useful screening tools and can catch conditions like iron-deficiency anemia or significant thyroid dysfunction.
However, some people continue to feel fatigued despite "normal" results. This doesn't mean nothing is happening — it may mean the specific panel run didn't capture the full picture. This is where a broader look at nutrient absorption, mineral status, and hormone patterns can sometimes add helpful context, particularly for people who have already had a standard workup without clear answers.
Where Functional Lab Testing May Add Information
Functional lab testing generally looks at a wider set of biomarkers than a standard annual panel, and may include:
- Hair tissue mineral analysis (HTMA): looks at longer-term mineral patterns, including minerals not typically checked on standard bloodwork.
- Comprehensive hormone panels: can assess cortisol rhythm and reproductive hormones beyond a single-point TSH check.
- Nutrient and micronutrient testing: evaluates absorption-related markers that may explain why supplementation alone hasn't resolved symptoms.
- Gut health testing: since digestive function affects nutrient absorption, gut markers are sometimes relevant to unexplained fatigue.
It's important to be clear about what this testing can and cannot do: functional lab testing does not diagnose disease, and no lab panel or wellness program can guarantee a specific outcome. These tools are best understood as ways to gather more information to discuss with a qualified provider, not as a replacement for medical evaluation.
A Root-Cause Approach for Los Angeles Residents
For people living and working in and around Los Angeles — where long commutes, demanding work schedules, and high-stress industries are common — fatigue often has more than one contributing factor. A root-cause approach means looking at sleep, nutrition, mineral status, hormones, and lifestyle together, rather than treating "tired" as a single problem with a single fix.
Mineral Rebalance Method™ offers this kind of personalized, root-cause-oriented support, including functional lab testing and mineral balance programs, for clients in the Los Angeles area and virtually. This isn't a substitute for a relationship with your primary care physician — it's meant to work alongside standard medical care, adding a layer of testing and personalized guidance for people who want a deeper look at what's contributing to their fatigue.
If you're curious whether this kind of testing might be useful for you, you can visit our Chronic Fatigue symptom page to go deeper on this exact topic, or explore functional lab testing options. For those specifically interested in hormone-related fatigue, our local hormone testing guide covers what a hormone panel can reveal. You can also read about afternoon energy crashes if your fatigue follows a specific daily pattern.
When to See a Doctor First
Before pursuing any functional testing, it's a good idea to rule out more urgent causes of fatigue with your physician — especially if you're also experiencing:
- Unexplained weight loss or gain
- Chest pain, palpitations, or shortness of breath
- Fainting or severe dizziness
- Signs of depression or significant mood changes
- Fever, night sweats, or unexplained pain
These symptoms warrant prompt medical attention and shouldn't wait on a wellness consultation.
Conclusion
Ongoing fatigue is rarely explained by one single factor, and for many people in the Los Angeles area, it's a combination of sleep, nutrition, hormones, and daily stress load. Standard bloodwork is an important first step, but for those who still feel exhausted after a "normal" result, a broader functional testing approach may offer additional insight.
If you'd like to explore whether personalized testing and a root-cause program could be a helpful next step for you, take the Root-Cause Fit Assessment — a brief, no-obligation way to see whether the 12-Week Mineral Rebalance Method™ is the right fit for your symptoms.