Biomarker Library

Every biomarker we measure, in plain language.

Curious about what biomarkers are or what a specific marker means? This page walks you through it in three steps.

1Learnwhat a biomarker is and why it matters2Findsearch every biomarker we measure3Get testedsee how to get yours measured
Step 1 · Learn

What is a biomarker?

A biomarker is a measurable signal in your blood, like ferritin, vitamin D or cholesterol, that shows how your body is actually working. Search the full library below, or open any one to learn what it means and what your result is telling you.

Spot deficienciesLow iron, vitamin D or B12, often before you feel a thing.
Catch risk earlyHeart, metabolic and organ markers move before symptoms do.
See what's workingTrack how diet, training or treatment changes your numbers.
Step 2 · Find

Search the full library.

By name, symptom or lab code. Every result opens a plain-language explainer of what it measures and what your result means.

Try:vitamin Dfatiguecholesterolthyroidtestosterone
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These markers are tested together in the panel→
Showing all biomarkers
1-Methylhistidine
1-MeHis, Nt-methylhistidine, Pi-methylhistidine
1MHIS
usually no specific symptoms
3-Methylhistidine
3-MeHis, tau-methylhistidine, N-tau-methylhistidine
3MHIS
usually no specific symptoms
Alanine
L-alanine, Ala
ALA
tiredness, rapid breathing, muscle weakness, poor feeding in babies
Alanine Aminotransferase (ALT)
ALT, GPT, alanine transaminase, SGPT
ALT
often none, sometimes fatigue, upper right belly discomfort, nausea
Albumin
Serum albumin, ALB
ALB
swelling in legs or belly, fatigue, often none
Albumin-corrected Calcium
Corrected calcium, adjusted calcium, calcium corrected for albumin
CACORR
muscle cramps, tingling, fatigue, excessive thirst, constipation
Albumin/Globulin Ratio
A/G ratio, albumin to globulin ratio
AGRATIO
fatigue, swelling, frequent infections
Alkaline Phosphatase (ALP)
ALP, alk phos, AP
ALP
often none, sometimes itching, yellowing of skin, bone pain
Alpha-Aminoadipic Acid
Alpha-aminoadipate, 2-aminoadipic acid, AAA
AADA
usually no specific symptoms, sometimes low muscle tone or developmental delay
Alpha-Aminobutyric Acid
Alpha-aminobutyrate, 2-aminobutyric acid, AABA
AABA
usually no specific symptoms
Alpha-Fetoprotein (AFP), Tumor Marker
AFP, alpha-fetoprotein, alpha fetoprotein
AFP
abdominal swelling, unexplained weight loss, fatigue, jaundice
Alpha-fetoprotein, MoM
AFP MoM, maternal serum AFP, MSAFP, alpha-fetoprotein multiple of median
AFPMOM
none, this is a routine pregnancy screening result
ALT/AST Ratio
ALT to AST ratio, inverse De Ritis ratio
ALTAST
fatigue, upper right abdominal discomfort
Aluminum, whole blood mixture
Whole blood aluminium, Al
AL
usually none, bone pain, weakness, confusion at high levels
Anti-Mullerian Hormone (AMH)
AMH, Mullerian inhibiting substance, MIS
AMH
trouble conceiving, irregular periods, family planning questions
Antinuclear Antibodies (ANA), Screen
ANA, antinuclear antibodies, ANA screen, antinuclear factor
ANA
joint pain, fatigue, skin rash, prolonged fever, hair loss
Apolipoprotein A1 (ApoA1)
ApoA1, Apolipoprotein A-I, ApoA-I
APOA1
Usually none on its own
Apolipoprotein B
ApoB, Apolipoprotein B-100, ApoB-100
APOB
Usually none until cardiovascular disease develops
APRI test
AST to platelet ratio index, APRI score
APRI
fatigue, abdominal swelling, jaundice
Arginine
L-arginine, Arg
ARG
vomiting, lethargy, confusion from high ammonia; stiff legs and walking problems
Arsenic, whole blood mixture
Whole blood arsenic, As
AS
usually none, nausea, abdominal pain, tingling, skin changes at high levels
Asparagine
L-asparagine, Asn
ASN
usually no specific symptoms
Aspartate Aminotransferase (AST)
AST, GOT, aspartate transaminase, SGOT
AST
often none, sometimes fatigue, upper right belly discomfort, muscle aches
Aspartic Acid
Aspartate, L-aspartic acid, Asp
ASP
usually no specific symptoms
Atherogenic Coefficient
AC, non-HDL to HDL ratio
ATHCOEFF
usually none
Atherogenic Index
AIP, atherogenic index of plasma, log TG/HDL
AIP
usually none
Basophils
Absolute basophil count, Basophil count
BASO#
Itching, hives, rash, swelling
Basophils (%)
Basophil percentage, Basophils relative, BASO%
BASO%
Itching, hives, rash, swelling
Beta-Alanine
3-aminopropanoic acid, b-alanine
BALA
usually no specific symptoms
Beta-Aminoisobutyric Acid
BAIBA, 3-aminoisobutyric acid
BAIBA
usually no specific symptoms
Beta-HCG, Tumor Marker
beta-hCG, β-hCG, beta human chorionic gonadotropin, hCG beta subunit
BHCG
testicular lump, pelvic mass, abdominal swelling, missed period
Bilirubin / Albumin Ratio
B/A ratio, bilirubin to albumin ratio
BILALB
jaundice, yellowing of skin or eyes
Bioavailable Testosterone
bioavailable testosterone, non-SHBG-bound testosterone
BIOTEST
low energy, low libido, mood changes, reduced muscle mass
Biological Age
biological age, metabolic age, phenotypic age
BIOAGE
none specific
Branched chain amino acid Total
BCAA, branched-chain amino acids, leucine isoleucine valine total
BCAA
poor feeding, vomiting, lethargy, sweet smelling urine, low muscle tone
Calcium
Ca, total calcium, serum calcium, kalzium
CA
fatigue, excessive thirst, muscle cramps, tingling, constipation, bone pain
Calcium/Albumin Ratio
calcium to albumin ratio, corrected calcium aid
CAALB
muscle cramps, tingling, fatigue, bone aches
Calcium, extracellular
Total calcium, serum calcium, Ca, calcium extracellular
CA
muscle cramps, tingling, fatigue, excessive thirst, constipation
Cancer Antigen 125 (CA-125)
CA-125, CA 125, cancer antigen 125, MUC16
CA125
bloating, pelvic or abdominal pain, feeling full quickly, changes in periods
Cancer Antigen 15-3 (CA 15-3)
CA 15-3, CA15-3, cancer antigen 15-3
CA153
breast lump, breast changes, fatigue, bone pain
Cancer Antigen 19-9 (CA 19-9)
CA 19-9, CA19-9, cancer antigen 19-9, carbohydrate antigen 19-9
CA199
abdominal pain, jaundice, unexplained weight loss, fatigue
Carcinoembryonic Antigen (CEA)
CEA, carcinoembryonic antigen
CEA
unexplained weight loss, change in bowel habits, fatigue, abdominal discomfort
Carnosine
beta-alanyl-L-histidine
CARN
usually no specific symptoms, sometimes developmental delay, seizures, low muscle tone
Chloride
Cl, Cl-, serum chloride, chlorid
CL
fatigue, weakness, excessive thirst, breathing changes
Citrulline
L-citrulline, Cit
CIT
vomiting, lethargy, confusion, poor feeding from high ammonia
Conjugated (Direct) Bilirubin
Direct bilirubin, conjugated bilirubin, DBIL
DBIL
yellowing of skin and eyes, dark urine, pale stools, itching
Copper, whole blood mixture
Whole blood copper, Cu
CU
fatigue, anaemia, tingling, weakness, poor coordination
Cortisol
Hydrocortisone, serum cortisol, compound F
CORT
fatigue, stress, poor sleep, weight gain, weight loss, low blood pressure, high blood pressure
Cortisol
cortisol, serum cortisol, hydrocortisone
CORT
fatigue, weight changes, low blood pressure, mood changes
Cortisol/DHEA-Sulfate Ratio
cortisol to DHEA-S ratio, stress hormone ratio
CORTDHEA
fatigue, low mood, poor sleep, low resilience to stress
Creatinine
Serum creatinine, Krea
CREA
usually none early, later swelling, fatigue, reduced urination
CRP/HDL
CRP to HDL ratio, hs-CRP/HDL
CRPHDL
usually none
Cyfra-21-1
Cyfra 21-1, CYFRA 21-1, cytokeratin 19 fragment, CK19 fragment
CYFRA
persistent cough, shortness of breath, chest discomfort, unexplained weight loss
CYP1A1 (Cancer Risk)
Cytochrome P450 1A1, CYP1A1 m1, rs4646903, aryl hydrocarbon hydroxylase
CYP1A1
No direct symptoms, gene variant studied for how the body processes tobacco-smoke and environmental carcinogens
CYP1A2 (Caffeine Metabolism)
Cytochrome P450 1A2, CYP1A2*1F, rs762551, caffeine metabolism gene
CYP1A2
Caffeine sensitivity, jitteriness, disrupted sleep
CYP2R1 (Vitamin D Activation)
Vitamin D 25-hydroxylase, CYP2R1, rs10741657
CYP2R1
Fatigue, low vitamin D, bone discomfort
Cystathionine
L-cystathionine
CYSTA
usually no specific symptoms
Cystatin C
Cystatin C, CysC
CYSC
usually none early, later swelling, fatigue, reduced urination
Cystine
L-cystine, dicysteine
CYST
kidney stones, back or side pain, blood in urine
De Ritis ratio
AST/ALT ratio, AST to ALT ratio
ASTALT
fatigue, upper right abdominal discomfort, jaundice
DHEA-Sulfate
DHEA-S, DHEAS, Dehydroepiandrosterone sulfate
DHEAS
excess hair growth, acne, irregular periods, hair thinning, early puberty
Dihydrotestosterone (DHT)
DHT, Androstanolone, 5-alpha-dihydrotestosterone
DHT
hair loss, excess hair growth, acne, oily skin
eGFR (Creatinine)
Estimated GFR, eGFR creatinine, CKD-EPI eGFR
EGFR
usually none early, later swelling, fatigue, reduced urination
eGFR (Cystatin C)
eGFR cystatin C, eGFRcys, estimated GFR cystatin C
EGFRCYS
often none early, later tiredness, swelling, changes in urination
Eosinophils
Absolute eosinophil count, AEC, Eosinophil count
EOS#
Itching, rash, wheeze, runny nose, hives
Eosinophils (%)
Eosinophil percentage, Eosinophils relative, EOS%
EOS%
Itching, rash, wheeze, runny nose, hives
Estradiol (E2)
E2, Oestradiol, 17-beta-estradiol
E2
irregular periods, hot flushes, low libido, mood changes, vaginal dryness, fatigue
Ethanolamine
Monoethanolamine, 2-aminoethanol
ETHA
usually no specific symptoms
Ferritin
Serum ferritin, iron stores
FERR
fatigue, hair loss, low stamina, brittle nails, pale skin, restless legs
Ferritin / Albumin Ratio
ferritin to albumin ratio, FAR
FERRALB
fatigue, signs of inflammation or illness
Ferritin/Cortisol Ratio
ferritin to cortisol ratio
FERRCORT
fatigue, stress
Follicle-Stimulating Hormone (FSH)
FSH, Follitropin
FSH
irregular periods, trouble conceiving, hot flushes, low libido, delayed or early puberty
Free Prostate-Specific Antigen (Free PSA)
fPSA, free PSA, free prostate specific antigen
FPSA
trouble urinating, weak stream, frequent urination at night, pelvic discomfort
Free Testosterone Index (FTI)
FTI, free androgen index, FAI
FTI
in women acne, excess hair, irregular periods; in men low libido, fatigue
Free Thyroxine (Free T4)
Free T4, FT4, Free Thyroxine
FT4
fatigue, weight change, feeling cold, feeling too hot, racing heart, dry skin
Free Triiodothyronine (Free T3)
Free T3, FT3, Free Triiodothyronine
FT3
racing heart, weight loss, anxiety, feeling too hot, tremor, fatigue
fT3/fT4 Ratio
free T3 to free T4 ratio, fT3 to fT4 ratio
FT3FT4
fatigue, cold intolerance, weight change, low mood
fT4 / TSH Ratio
free T4 to TSH ratio, fT4 to TSH ratio
FT4TSH
fatigue, weight change, temperature sensitivity, low mood
Gamma-Aminobutyric Acid (GABA)
GABA, gamma-aminobutyrate, 4-aminobutyric acid
GABA
seizures, developmental delay, low muscle tone
Gamma-Glutamyl Transferase (GGT)
GGT, gamma-GT, GGTP, gamma-glutamyl transpeptidase
GGT
often none, sometimes fatigue, upper right belly discomfort, yellowing of skin
GGT / HDL Cholesterol Ratio
GGT to HDL ratio, GGT/HDL-C
GGTHDL
usually none
GGT-to-Platelet Ratio (GPR)
GPR, gamma-glutamyl transferase to platelet ratio
GPR
fatigue, abdominal swelling, jaundice
Globulin
Serum globulin, total globulins
GLOB
often none, sometimes frequent infections, fatigue
Glucose
Fasting plasma glucose, fasting blood sugar, FPG
GLUC
increased thirst, frequent urination, fatigue, blurred vision, shakiness, sweating
Glucose, estimated average (eAG)
eAG, A1c-derived average glucose, ADAG
EAG
excessive thirst, frequent urination, tiredness, blurred vision
Glutamic Acid
Glutamate, L-glutamic acid, Glu
GLU
usually no specific symptoms; glutamate acts as a brain signalling chemical
Glutamine
L-glutamine, Gln
GLN
confusion, drowsiness, vomiting when ammonia is high; can be low in serious illness
Glycine
L-glycine, Gly, aminoacetic acid
GLY
lethargy, seizures, low muscle tone, poor feeding
HDL Cholesterol
HDL-C, high-density lipoprotein cholesterol, good cholesterol
HDL
usually none on its own
HDL Cholesterol (Electrophoresis)
High-density lipoprotein cholesterol, good cholesterol, HDL-C electrophoresis, alpha lipoprotein
HDLE
Usually no symptoms, low levels can contribute to chest pain or leg pain over time with advanced artery disease
Hematocrit
Hct, PCV, packed cell volume, hämatokrit
HCT
fatigue, shortness of breath, dizziness, pale skin, headache
Hemoglobin
Hb, Hgb, haemoglobin, hämoglobin
HGB
fatigue, shortness of breath, pale skin, dizziness, weakness
Hemoglobin A1c (HbA1c)
HbA1c, glycated haemoglobin, glycosylated haemoglobin, A1c
HBA1C
increased thirst, frequent urination, fatigue, blurred vision, slow healing
Hepatitis C Antibodies (Anti-HCV)
anti-HCV, HCV antibody test, hepatitis C antibody screen
ANTIHCV
fatigue, often no symptoms, jaundice, abdominal discomfort
Hepatitis C virus core IgG Ab
HCV core IgG, anti-HCV core, hepatitis C core antibody IgG
HCVCORE
fatigue, often no symptoms, jaundice, abdominal discomfort
High-Sensitivity C-Reactive Protein (hs-CRP)
High-sensitivity CRP, hs-CRP, cardiac CRP
HSCRP
often none, sometimes general fatigue
Histidine
His, H
HIS
usually no specific symptoms
HIV 1,2 Ag/Ab Combo
HIV combo test, fourth-generation HIV test, HIV Ag/Ab, HIV antigen/antibody test
HIVCMB
fever, sore throat, swollen glands, rash, night sweats, often no symptoms
HIV 1,2 Ag/Ab Combo p24-antigen Signal/Cutoff
HIV p24 antigen, p24 S/Co, HIV antigen signal to cutoff
P24SCO
fever, sore throat, rash, swollen glands, often no symptoms
HIV 1 & 2 Antibody Screening
HIV antibody test, anti-HIV, HIV-1/2 antibody screen
HIVAB
fever, sore throat, rash, swollen glands, often no symptoms
No biomarker matches that. Try a different name, a symptom like “fatigue”, or clear the search to browse them all.
Step 3 · Get tested

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