Phosphate
Mineral for bone, energy (ATP), and cell membranes.
What it is
Inorganic phosphate in mmol/L; often reviewed with calcium and vitamin D/PTH when abnormal.
Inorganic phosphate in blood is only a small fraction of total body phosphate, most of which sits in bone and inside cells as ATP and phospholipids. Labs report mmol/L. Abnormalities are often explored with calcium, vitamin D, PTH, and kidney function.
Inorganic phosphate in blood is only a small fraction of total body phosphate, most of which sits in bone and inside cells as ATP and phospholipids. Labs report mmol/L. Abnormalities are often explored with calcium, vitamin D, PTH, and kidney function.
Why it matters
Abnormal phosphate can relate to vitamin D, parathyroid status, kidney disease, refeeding, or diet. Marked shifts need medical care.
This guide is educational only and cannot diagnose you. Discuss results, especially anything outside your laboratory’s reference interval, or that does not match how you feel, with a GP or other appropriately qualified clinician.
Low phosphate can appear with vitamin D deficiency, hyperparathyroidism, refeeding after undernutrition, or certain medicines. High phosphate is common in advanced kidney disease. Symptoms of low phosphate can include muscle weakness; severe derangements are hospital territory.
Dietary phosphate is abundant in protein foods; deficiency from diet alone is uncommon in mixed UK diets but possible with disordered eating or phosphate binders.
This guide is educational only and cannot diagnose you. Discuss results, especially anything outside your laboratory’s reference interval, or that does not match how you feel, with a GP or other appropriately qualified clinician.
This guide is educational only and cannot diagnose you. Discuss results, especially anything outside your laboratory’s reference interval, or that does not match how you feel, with a GP or other appropriately qualified clinician.
Low phosphate can appear with vitamin D deficiency, hyperparathyroidism, refeeding after undernutrition, or certain medicines. High phosphate is common in advanced kidney disease. Symptoms of low phosphate can include muscle weakness; severe derangements are hospital territory.
Dietary phosphate is abundant in protein foods; deficiency from diet alone is uncommon in mixed UK diets but possible with disordered eating or phosphate binders.
This guide is educational only and cannot diagnose you. Discuss results, especially anything outside your laboratory’s reference interval, or that does not match how you feel, with a GP or other appropriately qualified clinician.
How it affects the body
Phosphate is integral to ATP and bone mineral. Hormones move phosphate between bone, gut, and kidney.
Phosphate is inseparable from cellular energy: ATP, creatine phosphate, and glycolytic intermediates all depend on it. Bone mineral (hydroxyapatite) stores vast amounts. Hormones (PTH, FGF23, vitamin D) move phosphate between gut, bone, and kidney to keep blood levels workable for nerves and muscle.
Phosphate is inseparable from cellular energy: ATP, creatine phosphate, and glycolytic intermediates all depend on it. Bone mineral (hydroxyapatite) stores vast amounts. Hormones (PTH, FGF23, vitamin D) move phosphate between gut, bone, and kidney to keep blood levels workable for nerves and muscle.
For athletes
Relative energy deficiency and disordered eating can disturb phosphate: medical and dietetic care beat self-supplementation.
Relative energy deficiency in sport (RED-S) and restrictive eating can disturb phosphate and bone markers together. Refeeding after extreme restriction needs medical supervision because phosphate can fall dangerously. Do not self-prescribe high-dose phosphate.
Relative energy deficiency in sport (RED-S) and restrictive eating can disturb phosphate and bone markers together. Refeeding after extreme restriction needs medical supervision because phosphate can fall dangerously. Do not self-prescribe high-dose phosphate.
Related tests
No published panels currently list this marker.