Current promotion
Blood Tests for Unexplained Weight Gain and Fatigue
Put numbers behind the symptoms your body keeps sending.
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Metabolic Discovery Comprehensive Panel: $331.96 with the promotion (regular $414.95, a savings of $82.99), promotional pricing at time of writing.
At a glance
Unexplained weight change and persistent fatigue often trace back to how your body processes energy, and blood testing measures the biomarkers involved. This 77-biomarker metabolic discovery panel screens blood sugar regulation, lipids, and organ function markers in one draw, giving adults with lingering symptoms concrete data to review with their doctor. It's currently 20% off through a partner promotion.
Best suited for
- Adults gaining weight, or unable to lose it, despite consistent healthy habits
- Anyone with persistent tiredness that rest doesn't fix
- People noticing mood or energy swings that seem tied to meals
- Those with frequent bloating or digestive changes alongside energy issues
- Anyone who wants lab data in hand before a doctor's appointment about these symptoms
What's included
Metabolic Discovery Comprehensive Panel
15 blood tests covering 77 biomarkers; full test-by-test contents are listed on the partner's order page
Deep-dive the key markers: Fasting Glucose, HbA1c, LDL-C, HDL-C, Triglycerides, eGFR, ALT
Key biomarker ranges
Commonly used adult reference ranges for markers this panel measures, labs vary, so always interpret results against your lab's stated ranges and with your doctor.
Commonly used reference ranges place fasting glucose at 70–99 mg/dL; results vary with sleep, stress, and recent illness, and labs differ slightly.
| Zone | Range |
|---|---|
| Low | 50–70 mg/dL |
| Optimal | 70–100 mg/dL |
| Prediabetic range | 100–126 mg/dL |
| Diabetic range | 126–160 mg/dL |
Commonly used reference ranges place HbA1c below 5.7%; conditions affecting red blood cells can skew results, so labs and clinicians interpret in context.
| Zone | Range |
|---|---|
| Optimal | 4–5.7 % |
| Prediabetic range | 5.7–6.5 % |
| Diabetic range | 6.5–10 % |
Commonly used reference ranges label LDL-C under 100 mg/dL optimal; ideal targets depend on your overall cardiovascular risk profile.
| Zone | Range |
|---|---|
| Optimal | 0–100 mg/dL |
| Near optimal | 100–130 mg/dL |
| Borderline high | 130–160 mg/dL |
| High | 160–190 mg/dL |
| Very high | 190–220 mg/dL |
The importance of testing
When weight changes without an obvious cause, or fatigue lingers no matter how much you sleep, the frustrating part is not knowing where to look. These symptoms are non-specific, they can trace back to blood sugar regulation, lipid metabolism, organ function, or simple lifestyle factors. Broad biomarker testing turns that guessing game into a structured checklist.
The Metabolic Discovery Comprehensive Panel screens 77 biomarkers across 15 tests in a single blood draw. Instead of testing one hypothesis at a time, you and your doctor get a wide view of the systems most often involved in energy and weight regulation, so patterns across related markers can surface imbalances a single test would miss.
Testing is a starting point, not an answer. Normal results are genuinely useful, they narrow the search, while out-of-range values are flags to review with your doctor, who can connect them to your symptoms, history, and next steps. Either way, you walk into your next appointment with data instead of just a description of how you feel.
Promo code
ULTA128BSave 20% on Discovery Panels with code ULTA128B, current promotion; confirm final pricing on the partner page.
Ready to get your numbers? Order online, visit a nearby draw site, and receive private results to review with your doctor.
Order NowFrequently asked questions
Which blood tests help investigate unexplained weight gain and fatigue?
Broad metabolic testing, blood sugar regulation, lipid, and organ function markers, is a common starting point, and this discovery panel covers 77 such biomarkers in one draw. Weight change and fatigue are non-specific symptoms, so breadth matters more than any single test. The results give you and your doctor concrete data to narrow down what's worth investigating.
Can a blood test tell me why I'm always tired?
Not by itself, blood tests measure biomarkers and flag values associated with fatigue-related imbalances, but only a clinician can determine the cause. What a panel like this does well is help rule things in or out and give your doctor a data-rich starting point. Persistent fatigue that isn't relieved by rest is always worth discussing with a professional.
Do I need a doctor's visit to order this testing?
No, the panel is ordered online directly, with results delivered securely to you at home. That makes it a practical first data-gathering step before, or between, doctor's appointments. Bring your results to your physician to interpret alongside your symptoms.
Is this testing available in my state?
In most US states, yes, but direct-to-consumer lab testing is restricted or prohibited in New York, New Jersey, and Rhode Island, so residents there may be blocked at the partner's checkout. Availability rules are set at the state level, not by the lab. Check the partner page for current details.
What symptoms suggest metabolic testing might be useful?
The partner page highlights unexplained weight change, persistent fatigue not relieved by rest, frequent digestive issues, and mood fluctuations that seem tied to food intake or energy levels. These are signals that markers may be worth checking, not medical conclusions. If symptoms are severe or worsening, see a doctor first rather than starting with a lab panel.
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