{| class="wikitable"
|-
! Compound
! Comments
! In whole blood (g/cm<sup>3</sup>)
! In plasma or serum (g/cm<sup>3</sup>)
|-
| Water
| Solvent
| 0.81-0.86
| 0.93-0.95
|-
| Acetoacetate
| Produced in liver
| 8-40
| 4-43
|-
| Acetone
| product of bodyfat breakdown
| 3-20
|
|-
| Acetylcholine
| Neurotransmitter of the parasympathetic nervous system
| 6.6-8.2
|
|-
| rowspan=3 | Adenosine triphosphate
| colspan=3 | Energy storage
|-
| total
| 3.1-5.7
| rowspan=2 |
|-
| phosphorus
| 5-10
|-
| rowspan=5 | Adrenocorticotrophic hormone
| colspan=2 | Stimulates the adrenal cortex
| 2.5-12
|-
| @ 6AM, mean
| rowspan=4 |
| 5.5
|-
| @ 6AM, maximum
| 12
|-
| @ 6PM, mean
| 3.5
|-
| @ 6PM, maximum
| <7.5
|-
| Alanine
| Amino acid
| 2.7-5.5
| 2.4-7.6
|-
| Albumin
| Blood plasma protein
|
| 3.5-5.0
|-
| Aluminum
|
| 1-40
| 1-88
|-
| Selenium
|
| 60–150 ng/mL
|
|-
| rowspan=4 | Aldosterone
| colspan=3 | Regulates electrolyte balance
|-
| supine
| rowspan=3 |
| 3-10
|-
| standing, male
| 6-22
|-
| standing, female
| 5-30
|-
| rowspan=3 | Amino acids
| colspan=3 | Protein building blocks
|-
| total
| 3.8-5.3
|
|-
| nitrogen
| 4.6-6.8
| 3.0-5.5
|-
| alpha-Aminobutyric acid
|
| 1-2
| 1-2
|-
| δ-Aminolevulinic acid
|
|
| 1.5-2.3
|-
| Ammonia nitrogen
|
| 1-2
| 1.0-4.9
|-
| rowspan=3 | cAMP
| colspan=3 | Intracellular signal transduction molecule
|-
| male
| rowspan=2 |
| 5.6-10.9
|-
| female
| 3.6-8.9
|-
| rowspan=3 | Androstenedione
| colspan=3 | Steroid hormone
|-
| male >18 yrs
| rowspan=2 |
| 2-30
|-
| female >18 yrs
| 8-30
|-
| Androsterone
| Steroid hormone
|
| 1.5
|-
| Angiotensin I
| Angiotensin II precursor
|
| 1.1-8.8
|-
| Angiotensin II
| Vasoconstrictor
|
| 1.2-3.6
|-
| Alpha 1-antitrypsin
| Serine protease inhibitor
|
| 7.8-20
|-
| Arginine
| Amino acid
| 6-17
| 1.3-3.6
|-
| rowspan=3 | Arsenic
| normal range
| 2-62
| rowspan=3 |
|-
| chronic poisoning
| 100-500
|-
| acute poisoning
| 600-9300
|-
| Ascorbic acid (Vitamin C)
| Important vitamin
| 1-15
| 6-20
|-
| rowspan=2 | Aspartic acid
| Amino acid
|
| 0-3
|-
| In WBCs
| 2.5-4.0
| 9-12
|-
| Bicarbonate
| Buffer in blood
|
| 5-5.7
|-
| Bile acids
| Digestive function, bilirubin excretion
| 2-30
| 3-30
|-
| Bilirubin
| Hemoglobin metabolite
| 2-14
| 1-10
|-
| Biotin (Vitamin H)
| Gluconeogenesis, metabolize leucine, fatty acid synthesis
| 7-17
| 9-16
|-
| Blood Urea Nitrogen (BUN)
|
|
| 8-23
|-
| Bradykinin
|
|
| 7
|-
| Bromide
|
|
| 7-10
|-
| rowspan=2 | Cadmium
| normal
| 1-5
| rowspan=2 |
|-
| toxic
| 0.1-3
|-
| Calciferol (vitamin D<sub>2</sub>)
| Maintain calcium and phosphorus levels
|
| 1.7-4.1
|-
| Calcitonin (CT)
| Hormone
|
| <1.0
|-
| rowspan=3 | Calcium
| colspan=3 |Bones,
|-
| ionized
| 4.48-4.92
| 4.25-5.25
|-
| total
|
| 8.4-11.5
|-
| rowspan=3 | Carbon dioxide
| colspan=3 |Respiratory gas
|-
| arterial
| 8.8-10.8
| 3.0-7.9
|-
| venous
| 9.8-11.8
| 3.3-8.3
|-
| rowspan=5 | Carboxyhemoglobin(as HbCO)
| nonsmokers
| 0.5-1.5% total Hb
| rowspan=5 |
|-
| smokers, 1-2 packs/day
| 4-5% total Hb
|-
| smokers, 2 packs/day
| 8-9% total Hb
|-
| toxic
| >20% total Hb
|-
| lethal
| >50% total Hb
|-
| Carcinoembryonic antigen
|
|
| <2.5
|-
| beta-Carotene
| colspan=2 | Vitamin A dimer
| 3-25
|-
| Carotenoids
| Antioxidant
| 2.4-23.1
|
|-
| Cephalin
|
| 3-11.5
| 0-1
|-
| Ceruloplasmin
|
|
| 1.5-6
|-
| Chloride, as NaCl
|
| 4.5-5
| 3.5-3.8
|-
| rowspan=3 | Cholecalciferol (Vitamin D3)
| 1, 25-dihydroxy
| rowspan=3 |
| 2.5-4.5
|-
| 24,25-dihydroxy
| 1.5
|-
| 25-hydroxy
| 1.4-8
|-
| Cholecystokinin (pancreozymin)
| colspan=2 | Stimulates fat and protein digestion
| 6.04
|-
| rowspan=4 | Cholesterol
| colspan=3 | Steroid lipid
|-
| LDLC
| rowspan=2 |
| 0.5-2.0
|-
| HDLC
| 2.9-9.0
|-
| total
| 1.15-2.25
| 1.2-2
|-
| Choline, total
|
| 1.1-3.1
| 3.6-3.5
|-
| rowspan=6 | Chorionic gonadotropin
| colspan=3 |Progesterone secretion during pregnancy
|-
| Menstrual
| rowspan=5 |
| 0-3
|-
| Pregnancy, 1st trimester
| 5-3300
|-
| Pregnancy, 2nd trimester
| 20-1000
|-
| Pregnancy, 3rd trimester
| 20-50
|-
| Menopausal
| 3-30
|-
| Citric acid
|
| 1.3-2.5
| 1.6-3.2
|-
| Citrulline
|
|
| 2-10
|-
| rowspan=15 | Coagulation Factors
| Fibrinogen
| 1.2-1.6
| 2-4
|-
| Prothrombin
| rowspan=14 |
| 1
|-
| Tissue thromboplastin
| 1
|-
| Proaccelerin
| 5-12
|-
| Proconvertin
| 1
|-
| Antihemophilic factor
| 1
|-
| Christmas factor
| 4
|-
| Stuart factor
| 5
|-
| Plasma thrmb. anteced.
| 4
|-
| Hageman factor
| 2.9
|-
| Fibrin-stabilizing factor
| 1
|-
| Fibrin split products
| <1
|-
| Fletcher factor
| 5
|-
| Fitzgerald factor
| 7
|-
| von Willebrand factor
| 7
|-
| Cobalamin (Vitamin B<sub>12</sub>)
| Needed for nerve cells, red blood cells, and to make DNA
| 6-14
| 1-10
|-
| Cocarboxylase
|
|
| 7-9
|-
| rowspan=14 | Complement system
| C1q
| rowspan=14 |
| 5.8-7.2
|-
| C1r
| 2.5-3.8
|-
| C1s (C1 esterase)
| 2.5-3.8
|-
| C2
| 2.2-3.4
|-
| C3( b1C-globulin)
| 8-15.5
|-
| factor B (C3 proactivator)
| 2-4.5
|-
| C4 (b1E-globulin)
| 1.3-3.7
|-
| C4 binding protein
| 1.8-3.2
|-
| C5 (b1F-globulin)
| 5.1-7.7
|-
| C6
| 4.8-6.4
|-
| C7
| 4.9-7
|-
| C8
| 4.3-6.3
|-
| C9
| 4.7-6.9
|-
| Properdin
| 2.4-3.2
|-
| Compound S
|
|
| 1-3
|-
| rowspan=3 | Copper
|
| 9-15
|
|-
| male
| rowspan=2 |
| 7-14
|-
| female
| 8-15.5
|-
| Corticosteroids
| colspan=2 | Steroid hormones
| 1-4
|-
| Corticosterone
|
|
| 4-20
|-
| rowspan=4 | Cortisol
| colspan=2 | Inhibits CRH secretion
| 3-23
|-
| 8 AM
| rowspan=3 |
| 6-23
|-
| 4 PM
| 3-15
|-
| 10 PM
| ~50% of 8 AM value
|-
| rowspan=2 | C-peptide
| fasting
| rowspan=2 |
| 0.5-2.0
|-
| maximum
| 4
|-
| C-reactive protein
| colspan=2 | Plasma protein
| 6.8-820
|-
| rowspan=3 | Creatine
| colspan=3 |Assists muscle cell energy supply
|-
| male
| rowspan=2 |
| 1.7-5.0
|-
| female
| 3.5-9.3
|-
| rowspan=2 | Creatinine
| male
| rowspan=2 |
| 0.8-1.5
|-
| female
| 0.7-1.2
|-
| rowspan=5 | Cyanide
| nonsmokers
| rowspan=5 |
| 4
|-
| smokers
| 6
|-
| nitroprusside therapy
| 10-60
|-
| toxic
| >100
|-
| lethal
| >1000
|-
| Cysteine
| Amino acid
| 6-12
| 1.8-5
|-
| rowspan=9 | Dehydroepiandrosterone(DHEA)
| colspan=3 | Steroid hormone
|-
| aged 1–4 yrs
| rowspan=8 |
| 0.2-0.4
|-
| aged 4–8 yrs
| 0.1-1.9
|-
| aged 8–10 yrs
| 0.2-2.9
|-
| aged 10–12 yrs
| 0.5-9.2
|-
| aged 12–14 yrs
| 0.9-20
|-
| aged 14–16 yrs
| 2.5-20
|-
| male
| 0.8-10
|-
| female, premenopausal
| 2.0-15
|-
| rowspan=7 | DHEA sulfate
| male
|
| 1.99-3.34
|-
| female
| colspan=2 |
|-
| newborn
| rowspan=5 |
| 1.67-3.64
|-
| pre-pubertal children
| 1.0-6.0
|-
| premenopausal
| 8.2-33.8
|-
| pregnancy
| 2.3-11.7
|-
| postmenopausal
| 1.1-6.1
|-
| 11-Deoxycortisol
|
|
| 1-7
|-
| rowspan=2 | Dihydrotestosterone (DHT)
| male
| rowspan=2 |
| 3-8
|-
| female
| 1-10
|-
| Diphosphoglycerate (phosphate)
|
| 8-16
|
|-
| DNA
| colspan=2 | The molecule of heredity
| 0-1.6
|-
| Dopamine
| colspan=2 | Neurotransmitter
| <1.36
|-
| Enzymes, total
|
|
| <6
|-
| Epidermal growth factor (EGF)
|
|
| <1
|-
| rowspan=3 | Epinephrine
| colspan=3 | Neurotransmitter of the sympathetic nervous system
|-
| after 15 min rest
|
| 3.1-9.5
|-
| when emitted
| 3.8
| 2-2.5
|-
| Ergothioneine
|
| 1-20
|
|-
| rowspan=4 | Erythrocytes (#/cm<sup>3</sup>)
| adult male, avg. (range)
| 5.2 (4.6-6.2)
| rowspan=4 |
|-
| adult female, avg. (range)
| 4.6 (4.2-5.4)
|-
| children, varies with age
| 4.5-5.1
|-
| reticulocytes
| 25-75
|-
| rowspan=3 | Erythropoietin
| adult, normal
| rowspan=3 |
| 0.5-2.5
|-
| pregnant
| 2.7-6.2
|-
| hypoxia or anemia
| 0.8-8.0
|-
| rowspan=8 | Estradiol (E2)
| male
| rowspan=8 |
| 8-36
|-
| female, follicular(days 1-10)
| 1-9
|-
| female, mean
| 5
|-
| female, pre-fertile (days 10-12)
| 10-15
|-
| female, fertile (days 12-14)
| 35-60
|-
| female, luteal (days 15-28)
| 20-40
|-
| female, pregnancy
| 3-70
|-
| female, postmenopausal
| 1-3
|-
| rowspan=4 | Estriol (E3)
| nonpregnant
| rowspan=4 |
| <2
|-
| pregnancy, weeks 22-30
| 3-5
|-
| pregnancy, weeks 32-37
| 6-11
|-
| pregnancy, weeks 38-41
| 25-170
|-
| rowspan=6 | Estrogen
| male
| rowspan=6 |
| 4-11.5
|-
| female, prepubertal
| <4
|-
| female, 1–10 days
| 6.1-39.4
|-
| female, 11–20 days
| 12.2-43.7
|-
| female, 21–30 days
| 15.6-35
|-
| female, postmenopausal
| <4
|-
| rowspan=8 | Estrone (E1)
| male
| rowspan=8 |
| 2.9-17
|-
| female, follicular
| 2-15
|-
| female, 1–10 days of cycle
| 4.3-18
|-
| female, 11–20 days of cycle
| 7.5-19.6
|-
| female, 20–29 days of cycle
| 13.1-20.1
|-
| pregnancy, weeks 22-30
| 3-5
|-
| pregnancy, weeks 32-37
| 5-6
|-
| pregnancy, weeks 38-41
| 7-10
|-
| rowspan=6 | Ethanol
| social high
| rowspan=6 |
| 0.5
|-
| reduced coordination
| 0.8
|-
| depression of CNS
| >1
|-
| confusion, falling down
| 2.0
|-
| loss of consciousness
| 3.0
|-
| coma, death
| >4
|-
| rowspan=3 | Fatty acids
| nonesterified (free)
|
| 8-25
|-
| esterified
| 2.5-3.9
| 7-20
|-
| total
|
| 1.9-4.5
|-
| rowspan=2 | Ferritin
| male
| rowspan=2 |
| 1.5-30
|-
| female
| 0.9-18
|-
| alpha-1-Fetoprotein
|
|
| 0-2
|-
| Flavin adenine dinucleotide
|
|
| 8-12
|-
| Fluoride
|
| 1-4.5
| 1-4.5
|-
| rowspan=2 | Folate
|
|
| 2.2-17.3
|-
| in erythrocyte
|
| 1.67-7.07
|-
| Folic acid
|
| 2.3-5.2
| 1.6-2
|-
| Fructose
|
| 0-5
| 7-8
|-
| Furosemide glucuronide
|
|
| 1-400
|-
| Galactose
| children
|
| <2
|-
| Gastric inhibitory peptide (GIP)
|
|
| <1.25-4.0
|-
| rowspan=2 | Gastrin
| mean
| rowspan=2 |
| 7
|-
| maximum
| <20
|-
| rowspan=5 | Globulin
|
|
| total 2.2-4
|-
| alpha-1-Globulin
|
| 1-4
|-
| alpha-2-Globulin
|
| 4-10
|-
| beta globulin
|
| 5-12
|-
| gamma globulin
|
| 6-17
|-
| rowspan=2 | Glucagon
| range
| rowspan=2 |
| 5-15
|-
| mean
| 7.1-7.9
|-
| rowspan=4 | Glucosamine
| fetus
| 4-6
| 4.2-5.5
|-
| child
| 5-7
| 5.2-6.9
|-
| adult
| 6-8
| 6.1-8.2
|-
| aged
| 7-9
| 7.0-8.9
|-
| rowspan=3 | Glucose
| newborn
| 2-3
|
|-
| adult
| 6.5-9.5
| 7-10.5
|-
| diabetic
| 14-120
|
|-
| Glucuronic acid
|
| 4.1-9.3
| 8-11
|-
| Glutamic acid
|
|
| 2-28
|-
| Glutamine
|
|
| 4.6-10.6
|-
| Glutathione
| reduced
| 2.5-4.1
| 0
|-
| Glycerol
| free
|
| 2.9-17.2
|-
| Glycine
|
| 1.7-2.3
| 8-54
|-
| Glycogen
|
| 1.2-16.2
| 0
|-
| Glycoprotein, acid
|
|
| 4-15
|-
| cGMP
|
|
| 0.6-4.4
|-
| Gonadotropin-releasing hormone
|
|
| 1-80
|-
| Guanidine
|
| 1.8-2.3
|
|-
| Haptoglobin
|
|
| 3-22
|-
| rowspan=7 | Hemoglobin
|
| 1.2-1.75
| 1-4
|-
| newborn
| 1.65-1.95
| rowspan=6 |
|-
| children, varies with age
| 1.12-1.65
|-
| adult, male
| 1.4-1.8
|-
| adult, female
| 1.2-1.6
|-
| inside erythrocyte
| ~3.3
|-
| per red blood cell
| 27-32 picograms
|-
| Hexosephosphate P
|
| 1.4-5
| 0-2
|-
| Histamine
|
| 6.7-8.6
|
|-
| Histidine
|
| 9-17
| 1.1-3.8
|-
| Hydrogen ion(pH 7.4)
|
| 4
|
|-
| beta-Hydroxybutyric acid
|
| 1-6
| 1-9
|-
| 17α-Hydroxycorticosteroids
|
| 4-10
|
|-
| rowspan=5 | 17α-Hydroxyprogesterone
| male
| rowspan=5 |
| 20-250
|-
| female, follicular
| 20-80
|-
| female, luteal
| 80-300
|-
| female, postmenopausal
| 4-50
|-
| female, child
| 20-140
|-
| rowspan=5 | Antibodies
|Immunoglobulin A (IgA)
| rowspan=5 |
|5-39
|-
|Immunoglobulin D (IgD)
|0.5-8.0
|-
|Immunoglobulin G (IgG)
|5.0-19
|-
|Immunoglobulin M (IgM)
|3.0-30
|-
|Immunoglobulin E (IgE)
|<5
|-
|Indican
|
|
|8-50
|-
|Inositol
|
|
|3-7
|-
|Insulin
|
|
|2.0-8.4
|-
|Insulin-like growth factor
|
|
|9.9-50
|-
|Iodine
| total
|2.4-3.2
|4.5-14.5
|-
|Iron
| adult
|4-6
|6-18
|-
|Isoleucine
|
|9-15
|1.2-4.2
|-
|Ketone bodies
|
|2.3-10
|1.5-30
|-
|alpha-Ketonic acids
| adult
|1-30
|
|-
| rowspan=2 | L-Lactate
|arterial
|<11.3
|4.5-14.4
|-
|venous
|8.1-15.3
|4.5-19.8
|-
| rowspan=2 | Lead
| normal
|1-5
|1-7.8
|-
|toxic
|>6-10
|
|-
|Lecithin
|
|1.1-1.2
|1-2.25
|-
|Leptin
|
|1.2
|
|-
|Leucine
|
|1.4-2
|1.2-5.2
|-
| rowspan=29 | Leukocytes (#/cm<sup>3</sup>) Total:
| total, birth
|9.0-30.0
| rowspan=29 |
|-
| total, pediatric
|4.5-15.5
|-
| total, adult, range
|4.3-11.0
|-
| total, adult, median
|7.0
|-
|Neutrophil granulocytes, birth
|6.0-26.0
|-
|Neutrophils, pediatric
|1.5-8.5
|-
|Neutrophils, adult, range
|1.83-7.25
|-
|Neutrophils, adult, median
|3.65
|-
|Eosinophil granulocytes birth
|0.4
|-
|Eosinophils, pediatric
|0.2-0.3
|-
|Eosinophils, adult, range
|0.05-0.7
|-
|Eosinophils, adult, median
|0.15
|-
|Basophil granulocytes, adult, range
|0.015-0.15
|-
|Basophils, adult, median
|0.03
|-
|Lymphocytes, birth
|2-11
|-
|Lymphocyte, pediatric
|1.5-8.0
|-
|Lymphocyte, adult, range
|1.5-4.0
|-
|Lymphocyte, adult, median
|2.5
|-
|Monocytes, birth, range
|0.4-3.1
|-
|Monocytes, birth, median
|1.05
|-
|Monocytes, pediatric
|0.4
|-
|Monocytes, adult, range
|0.21-1.05
|-
|Monocytes, adult, median
|0.43
|-
|Phagocytes, birth, range
|6-26
|-
|Phagocytes, birth, median
|11
|-
|Phagocytes, pediatric, range
|1.5-8.5
|-
|Phagocytes, pediatric, median
|4.1
|-
|Phagocytes, adult, range
|3.5-9.2
|-
|Phagocytes, CD4 cell count
|0.5-1.5
|-
|Lipase P
|
|1.2-1.4
|
|-
|Lipids
| total
|4.45-6.1
|4-8.5
|-
|Lipoprotein (Sr 12-20)
|
|
|1-10
|-
|Lithium
|
|1.5-2.5
|
|-
|Lysine
|
|1.3-3
|2-5.8
|-
|Lysozyme (muramidase)
|
|
|1-15
|-
| rowspan=3 | alpha 2-macroglobulin
|pediatric
| rowspan=3 |
|2-7
|-
| male, adult
|0.9-4.0
|-
|female, adult
|1.2-5.4
|-
|Magnesium
|
|3.2-5.5
|1.8-3.6
|-
|Malic acid
|
|4.6
|1-9
|-
|Manganese
|
|0-2.5
|0-1.9
|-
| rowspan=2 | Melatonin
|Day
| rowspan=2 |
|1.35-1.45
|-
|Night
|6.07-7.13
|-
| rowspan=2 | Mercury
|normal
|<1
| rowspan=2 |
|-
|chronic
|>20
|-
|Methemoglobin
|
|4-6
|
|-
|Methionine
|
|4-6
|1-15
|-
|Methyl guanidine
|
|2-3
|
|-
|beta-2-microglobulin
|
|
|8-24
|-
|MIP-1a
|
|
|2.3
|-
|MIP-1b
|
|
|9
|-
|Mucopolysaccharides
|
|
|1.75-2.25
|-
|Mucoproteins
|
|
|8.65-9.6
|-
|Nerve growth factor (NGF)
|
|
|6-10
|-
|Niacin
|
|5-8
|2-15
|-
| rowspan=2 | Nitrogen
|respiratory gas
|8.2
|9.7
|-
|total, nonrespiratory
|3-3.7
|
|-
| rowspan=3 | Norepinephrine
| colspan=3 | Neurotransmitter of the sympathetic nervous system
|-
|after 15 min rest
|
|2.15-4.75
|-
|when emitted
|8.1
|8.5
|-
|Nucleotide
| total
|3.1-5.2
|
|-
|Ornithine
|
|
|4-14
|-
|Oxalate
|
|
|1-2.4
|-
| rowspan=2 | Oxygen (respiratory gas)
|arterial
|2.4-3.2
|3.9
|-
|venous
|1.6-2.3
|1.6
|-
| rowspan=3 | Oxytocin
|male
| rowspan=3 |
|2
|-
|female, nonlactating
|2
|-
|female, pregnant 33-40 wks
|32-48
|-
|Pancreatic polypeptide
|
|
|5-20
|-
|Pantothenic acid (vitamin B<sub>5</sub>)
|
|1.5-4.5
|6-35
|-
|Para-aminobenzoic acid
|
|3-4
|
|-
|Parathyroid hormone (PTH)
|
|
|2-4
|-
|Pentose
| phosphorated
|
|2-2.3
|-
|Phenol
| free
|7-10
|
|-
|Phenylalanine
|
|8-12
|1.1-4
|-
|Phospholipid
|
|2.25-2.85
|5-12
|-
|Phosphatase
| acid, prostatic
|
|<3
|-
| rowspan=3 | Phosphorus
|inorganic, adult
|2-3.9
|2.3-4.5
|-
|inorganic, children
|
|4.0-7.0
|-
|total
|3.5-4.3
|1-1.5
|-
|Phytanic acid
|
|
|<3
|-
| rowspan=2 | Platelets (#/cm<sup>3</sup>):
|range
|1.4-4.4
| rowspan=2 |
|-
|median
|2.5
|-
|Platelet-derived growth factor
|
|
|5.0
|-
|Polysaccharides
| total
|
|7.3-13.1
|-
|Potassium
|
|1.6-2.4
|1.4-2.2
|-
|Pregnenolone
|
|
|3-20
|-
| rowspan=6 | Progesterone (female)
| female, follicular
| rowspan=6 |
|0.4-0.9
|-
| female, midluteal
|7.7-12.1
|-
|pregnancy, weeks 16-18
| 30-66
|-
|pregnancy, weeks 28-30
|70-126
|-
|pregnancy, weeks 38-40
|131-227
|-
| male
| 12-20
|-
| rowspan=2 | Proinsulin
|fasting
| rowspan=2 |
|0.5-5
|-
|mean
|1.42-1.70
|-
| rowspan=2 | Prolactin (male) <20
|while awake
| rowspan=4 |
|1-7
|-
|during sleep
|9-20
|-
| rowspan=2 | Prolactin (female)
|follicular
|<23
|-
|luteal
|5-40
|-
|Proline
|
|
|1.2-5.7
|-
| rowspan=4 | Prostaglandins
|PGE
| rowspan=4 |
|3.55-4.15
|-
|PGF
|1.26-1.56
|-
|15-keto-PGF2a
|5
|-
|15-keto-PGE2
|<5
|-
|Protein
| total
|1.9-2.1
|6.0-8.3
|-
|Protoporphyrin
|
|2.7-6.1
|
|-
|Prostate specific antigen
|
|0-5
|
|-
|Pseudoglobulin I
|
|
|8-19
|-
|Pseudoglobulin II
|
|
|2-8
|-
|Purine
| total
|9.5-11.5
|
|-
|Pyrimidine nucleotides
|
|2.6-4.6
|2-12
|-
|Pyridoxine (Vitamin B6)
|
|
|3.6-90
|-
|Pyruvic acid
|
|3-10
|3-12
|-
|RANTES
|
|
|7
|-
| rowspan=4 | Relaxin
|day <100 preparturition
| rowspan=4 |
|<2
|-
|day 100 to 2 days preceding
|5-40
|-
|day preceding parturition
|100-200
|-
|day following parturition
|<2
|-
|Retinol (Vitamin A)
|
|
|1-8
|-
|Riboflavin (Vitamin B<sub>2</sub>)
|
|1.5-6
|2.6-3.7
|-
|RNA
|
|5-8
|4-6
|-
|Secretin
|
|
|2.9-4.5
|-
|Serine
|
|
|3-20
|-
|Serotonin (5-hydroxytryptamine)
|
|1.55-1.81
|0.8-2.1
|-
|Silicon
|
|1.4-2.95
|2.2-5.7
|-
|Sodium
|
|
|3.1-3.4
|-
|Solids, total
|
|2-2.5
|8-9
|-
|Somatotropin
| growth hormone
|
|4-140
|-
|Sphingomyelin
|
|1.5-1.85
|1-4
|-
|Succinic acid
|
|
|5
|-
|Sugar, total
|
|7-11
|
|-
|Sulfates
| inorganic
|
|8-12
|-
|Sulfur
| total
|3.8-5
|3.1-3.8
|-
|Taurine
|
|
|3-21
|-
| rowspan=2 | Testosterone (male)
|free
| rowspan=5 |
|5.6-10.2
|-
|total
|275-875
|-
| rowspan=3 | Testosterone (female)
|free
|0.24-0.38
|-
|total
|23-75
|-
|pregnant
|38-190
|-
|Thiamine (Vitamin B<sub>1</sub>)
|
|3-10
|1-9
|-
| rowspan=3 | Thiocyanate
|
|5-14
|
|-
|nonsmoker
| rowspan=2 |
|1-4
|-
|smoker
|3-12
|-
|Threonine
|
|1.3-2
|0.9-3.2
|-
|Thyroglobulin (Tg)
|
|
|<5
|-
|Thyroid hormones
|
|
|4-8
|-
|Thyrotropin-releasing hormone
|
|
|5-60
|-
| rowspan=2 | Thyroxine (FT4)
|free
| rowspan=2 |
|8-24
|-
|total
|4-12
|-
|Thyroxine-binding prealbumin
|
|
|2.8-3.5
|-
|Thyroxine-binding globulin
|
|
|1.0-3.4
|-
|Tin
|
|0-4
|0-1
|-
|alpha-Tocopherol (Vitamin E)
|
|
|5-20
|-
| rowspan=2 | Transcortin
|male
| rowspan=2 |
|1.5-2
|-
|female
|1.6-2.5
|-
| rowspan=3 | Transferrin
|newborn
| rowspan=3 |
|1.3-2.75
|-
|adult
|2.2-4
|-
|age >60 yrs
|1.8-3.8
|-
|Triglycerides
|
|8.5-23.5
|2.5-30
|-
| rowspan=2 | Triiodothyronine
|free
| rowspan=2 |
|2.3-6.6
|-
|total (T3)
|0.75-2.50
|-
|Tryptophan
|
|5-10
|9-30
|-
|Tyrosine
|
|8-14
|4-25
|-
|Urea
|
|2-4
|1.5-4.7
|-
|adult, male
|3.4-7.2