Biomarkers
Which blood tests should you measure? Useful baseline values for longevity and health
Not every blood value is equally important. A useful baseline covers metabolism, lipids, inflammation, iron, B12/folate, vitamin D and context-specific values.
2026-05-17
Key takeaways
What to take away now
Not every blood value is equally important. A useful baseline covers metabolism, lipids, inflammation, iron, B12/folate, vitamin D and context-specific values.
- ✓One isolated value or tip is rarely enough. Context, trend and goal matter.
- ✓The next useful step is often a better measurement, a small test or a re-check.
- ✓If you have your own values, they should not be interpreted in isolation.
Apply this to your data
Do you have your own values or supplements?
Do not just keep reading in general. Enter your data and get a first structured interpretation.
How LongLifeScan interprets
Careful, context-based and without diagnosis promises.
LongLifeScan does not replace medical advice, diagnosis or treatment. For medical conditions, medication, pregnancy, strong symptoms or abnormal values, clarify clinically.
Our interpretation follows 4 rules:
- ✓Understand context first: goal, symptoms, medication, nutrition and trend.
- ✓Measurement before action when a value meaningfully changes the decision.
- ✓Food first and routine first before another product purchase is recommended.
- ✓Plan a re-check so actions do not run blindly long-term.
What you can enter
Values such as HbA1c, ApoB, LDL, ferritin, B12, vitamin D, CRP plus goal and trend.
Free interpretation
Interpret your lab values for free
Enter HbA1c, ApoB, LDL, ferritin, B12, vitamin D or other values and see what next step makes sense.
Next step
Turn this article into a plan
If you want to know what has priority for you, use the Free Check or Premium for concrete todos and re-checks.
Which blood tests should you measure? Useful baseline values for longevity and health
Many people want to measure “everything.” That sounds thorough, but it is not always useful. A better question is: which values would change your next decision?
Short answer
A useful baseline often covers metabolism, lipids, inflammation, CBC, iron status, B12/folate, vitamin D and depending on goal thyroid, liver/kidney, blood pressure, body metrics or wearables. The number of values matters less than fit to goal, risk, symptoms and re-check.
Why more values are not automatically better
More values can create confusion. Good testing answers a question: goal, symptoms, risk, baseline values, gaps, re-check.
Useful baseline values
| Area | Values | |---|---| | Metabolism | HbA1c, fasting glucose | | Lipids | ApoB, LDL-C, HDL-C, triglycerides, non-HDL-C | | Inflammation | hs-CRP or CRP depending on context | | CBC | hemoglobin, MCV, MCH, leukocytes, platelets | | Iron status | ferritin, transferrin saturation, CRP context | | B vitamins | B12, holo-TC, folate, possibly MMA | | Vitamin D | 25-OH vitamin D | | Liver/kidney | context-specific standard values | | Thyroid | TSH, possibly fT3/fT4 and antibodies |
Cardiovascular values
ApoB, LDL-C, HDL-C, triglycerides, non-HDL-C, blood pressure, HbA1c/glucose, waist and hs-CRP may be relevant. ApoB can be especially useful when triglycerides, HDL, HbA1c or abdominal fat matter.
Fatigue and energy values
CBC, ferritin, transferrin saturation, CRP, B12/holo-TC, folate, TSH, HbA1c/glucose and vitamin D may be useful. Fatigue does not prove one deficiency.
Values before supplements
| Supplement topic | Values | |---|---| | Vitamin D | 25-OH vitamin D, calcium context | | Iron | ferritin, transferrin saturation, CBC, CRP | | B12/folate | B12, holo-TC, MMA, folate, CBC | | Omega-3 | omega-3 index, triglycerides | | Iodine/selenium/thyroid | TSH, fT3/fT4, antibodies, selenium status | | Lipid products | ApoB, LDL-C, triglycerides, HDL-C |
Beyond blood tests
Blood pressure, resting HR, HRV, sleep, steps, training, waist, nutrition, medication, symptoms and family history matter too.
How often should you measure?
It depends on value and goal. Decide what action a re-check should inform.
What LongLifeScan does
LongLifeScan helps view values as patterns. Free Check captures values and goals. Premium adds gaps, priorities, re-checks, clinician questions and todos.
FAQ
Which blood tests matter for longevity?
Often HbA1c, ApoB, LDL-C, HDL-C, triglycerides, hs-CRP, CBC, ferritin, B12/folate and vitamin D.
Do I need ApoB?
It can be useful with cardiovascular focus, abnormal lipids or metabolic context.
Which values before supplements?
Vitamin D, iron, B12/folate, omega-3 and thyroid/selenium/iodine topics often benefit from values.
Are home tests useful?
Some can be practical, but quality, interpretation and re-check matter.
Read next
Build a more complete picture.
One article is rarely enough. Combine knowledge about values, measurements, nutrition, movement and supplements.
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The next step is not more reading, but interpretation.
Use the article as a starting point. Then check which personal values, wearable data or measurement gaps fit your goal.
Biomarkers
Understand values
View HbA1c, ApoB, LDL, triglycerides, hs-CRP, ferritin or vitamin D in context.
Measurements
Measure correctly
Which measurement actually helps: labs, blood pressure, wearable, body composition or trends.
Plans
Concrete plan
Turn knowledge into priorities: nutrition, movement, supplements, re-check or clinician questions.
Read the article?
Now apply it to your own values.
Many health articles stay generic. LongLifeScan helps connect the key points with your labs, wearables and goals.
Personal interpretation
Do you have your own values and want to understand them better?
A Longevity Report helps you interpret biomarkers, supplement questions, and health areas in one clear context — understandable, prioritized, and without overwhelm.