Bloodwork & Biomarkers
Explore plain-English guides to common blood tests, metabolic markers, hormones, organ-function panels, cardiovascular risk markers, nutrients, and strategies for tracking results over time.
Filters the bloodwork guides shown on this page.
Major areas covered
Find the markers that matter to your question
Blood tests become easier to understand when they are organized by purpose rather than treated as isolated numbers.
Getting Started
Essential markers, testing frequency, and tracking results.
Explore 3 guides →Metabolic Markers
Glucose regulation, insulin sensitivity, and long-term trends.
Explore 5 guides →Organ Function
Liver, kidney, thyroid, and broader chemistry panels.
Explore 4 guides →Hormones & Growth
Testosterone, estradiol, SHBG, IGF-1, and PSA.
Explore 5 guides →Cardiovascular Risk
Lipids, ApoB, lipoprotein(a), inflammation, and homocysteine.
Explore 5 guides →Nutrients & Iron
Vitamin D, vitamin B12, ferritin, and related context.
Explore 3 guides →Research Planning
Baselines for GLP-1, longevity, and performance research.
Explore 3 guides →Tracking Over Time
Compare trends, testing conditions, and repeated results.
Learn how →Begin with the markers people ask about most
These guides provide useful context before exploring more specialized hormone, cardiovascular, or research-specific testing.
Blood Markers Everyone Should Know
A practical overview of commonly measured markers related to metabolic, cardiovascular, liver, kidney, hormone, and general health.
Read the overview → Metabolic healthHbA1c
Learn what HbA1c estimates, why it is useful, and why it should be considered alongside other glucose markers.
Read the guide → Heart healthLipid Panel
Understand total cholesterol, LDL-C, HDL-C, triglycerides, and why advanced markers may add context.
Read the guide →Browse every bloodwork guide
These links use the permanent URLs in the TalkingPeps roadmap. Guides will become available as each page is completed and published.
Getting Started & Tracking
Foundational testing, frequency, and interpreting changes over time.
Blood Markers Everyone Should Know
A practical introduction to commonly monitored health markers.
Read guide → PlanningHow Often Should Bloodwork Be Repeated?
Learn why testing frequency depends on context and purpose.
Read guide → TrackingComparing Results Over Time
Learn how trends can be more useful than isolated test results.
Read guide →Core Blood Panels
Broad panels frequently included in routine laboratory testing.
Metabolic Markers
Glucose regulation, insulin sensitivity, and long-term metabolic trends.
HbA1c
An estimate of average blood glucose exposure over recent months.
Read guide → MetabolicFasting Glucose
A snapshot of blood glucose after a period without food.
Read guide → MetabolicFasting Insulin
Context for how much insulin may be required to maintain fasting glucose.
Read guide → Calculated MarkerHOMA-IR
A calculated estimate using fasting glucose and fasting insulin.
Read guide →Organ Function
Markers related to liver, kidney, and thyroid function.
Liver Enzymes
Learn how common liver-associated markers are interpreted together.
Read guide → KidneyKidney Function
Creatinine, eGFR, BUN, and the limitations of single measurements.
Read guide → ThyroidThyroid Panel
TSH, thyroid hormones, and why multiple markers may be considered.
Read guide →Hormones & Growth
Sex hormones, binding proteins, growth signaling, and prostate monitoring.
Testosterone
Total testosterone, free testosterone, timing, and interpretation.
Read guide → HormoneEstradiol
A key estrogen marker relevant across male and female physiology.
Read guide → Binding ProteinSHBG
A protein that influences the amount of circulating free sex hormones.
Read guide → Growth AxisIGF-1
A marker commonly used to assess growth-hormone-related signaling.
Read guide → ProstatePSA
A prostate-associated marker that requires clinical context and trend review.
Read guide →Cardiovascular & Inflammation Markers
Lipids, particle-related risk markers, inflammation, and methylation context.
Lipid Panel
Total cholesterol, LDL-C, HDL-C, and triglycerides.
Read guide → Particle MarkerApoB
A marker reflecting the number of atherogenic lipoprotein particles.
Read guide → Inherited RiskLipoprotein(a)
A largely inherited cardiovascular risk marker.
Read guide → InflammationC-Reactive Protein (CRP)
A nonspecific marker that may rise with inflammation.
Read guide → Metabolic RiskHomocysteine
A sulfur-containing amino acid influenced by several nutritional and genetic factors.
Read guide →Nutrients & Iron Status
Common tests related to vitamins, nutrient status, and iron storage.
Research-Specific Bloodwork
Baseline and follow-up considerations for different research goals.
Bloodwork Before GLP-1 Research
Common baseline markers considered in metabolic and GLP-1-related research.
Read guide → LongevityBloodwork for Longevity
Markers often discussed in healthy-aging and healthspan research.
Read guide → PerformanceBloodwork for Performance
Laboratory markers commonly considered in training and performance contexts.
Read guide →A result is only one piece of the picture
Laboratory values can be influenced by testing conditions, hydration, recent exercise, illness, medications, age, sex, and laboratory methods. Trends and clinical context usually matter more than reacting to one isolated number.
Understand the data. Then discuss the context.
TalkingPeps connects organized bloodwork guides with community discussions about testing, trends, research questions, and the limitations of interpreting biomarkers without context.