Supplement
Phosphorus is a mineral that pairs with calcium to build bones and teeth and helps cells store energy. People look at it mainly for supportive care in acute liver failure, where blood phosphorus often runs low as the liver regenerates, and the evidence is moderate. Most other research looked at too much rather than too little, and human studies found high intake raised parathyroid hormone, including in kidney disease.
Sources: PMID 9647491; PMID 28378123
- Updated
- How we grade
- 19 studies cited
- Best evidence
- Grade B
- Conditions studied
- 4
- Outcomes
- 6
- Graded outcomes
- 0240
Evidence by condition
- Strong
- Moderate
- Limited
- Very limited
General
| Grade | Outcome | Effect | Size | Studies | People | Studies list |
|---|---|---|---|---|---|---|
| Parathyroid Hormone Elevation Multiple human clinical studies demonstrate that high phosphorus intake stimulates parathyroid hormone (PTH) secretion, contributing to secondary hyperparathyroidism. Conversely, very low dietary phosphate intake with calcium carbonate supplementation corrected secondary hyperparathyroidism in severe CRF patients. Dietary phosphorus restriction is a well-established clinical intervention. | Improves (the measure goes up) | Moderate effect | 5 studies | |||
Studies that measured parathyroid hormone elevation
| ||||||
| Grade | Outcome | Effect | Size | Studies | People | Studies list |
|---|---|---|---|---|---|---|
| Hyperphosphatemia Management in CKD Multiple human clinical studies in CKD and dialysis patients demonstrate that dietary phosphorus restriction and modified cooking methods effectively reduce serum phosphorus levels. Improving diet recipes and cooking methods attenuated hyperphosphatemia in peritoneal dialysis patients. Very low protein diets supplemented with keto-analogues also reduced phosphorus burden. | Improves (the measure goes up) | Moderate effect | 5 studies | |||
Studies that measured hyperphosphatemia management in ckd
| ||||||
Cardiovascular Disease
- Cardiovascular Disease Risk: worsens
| Grade | Outcome | Effect | Size | Studies | People | Studies list |
|---|---|---|---|---|---|---|
| Cardiovascular Disease Risk Multiple observational and mechanistic studies associate high serum phosphorus with increased cardiovascular disease risk and mortality, even within the normal reference range. Elevated phosphate intake, particularly from processed food additives, promotes vascular calcification and endothelial dysfunction through FGF23 and Klotho-related pathways. | Worsens (the measure goes up) | Moderate effect | 5 studies | |||
Studies that measured cardiovascular disease risk | ||||||
Atherosclerosis
- Vascular Calcification: improves
| Grade | Outcome | Effect | Size | Studies | People | Studies list |
|---|---|---|---|---|---|---|
| Vascular Calcification Mechanistic and observational studies demonstrate that excess phosphorus promotes pathological vascular calcification by inducing osteogenic differentiation of vascular smooth muscle cells. Clinical studies in CKD patients show phosphate burden accelerates arterial calcification and vascular stiffness. | Improves (the measure goes up) | Moderate effect | 4 studies | |||
Studies that measured vascular calcification | ||||||
Bone Health
- Bone Mineralization: improves
- Bone Mineral Density (Excess Intake): changes; see studies
| Grade | Outcome | Effect | Size | Studies | People | Studies list |
|---|---|---|---|---|---|---|
| Bone Mineralization Phosphorus is essential for hydroxyapatite crystal formation in bone. An RCT found phosphate and carbonate salts of calcium supported robust bone building in osteoporosis. However, adequate calcium co-intake is required; phosphorus supplementation without sufficient calcium may paradoxically impair bone health by stimulating PTH secretion. | Improves (the measure goes up) | Moderate effect | 4 studies | |||
| Bone Mineral Density (Excess Intake) Observational studies associate excessive phosphorus intake (particularly phosphoric acid from soft drinks) with lower bone mineral density. The mechanism involves chronic PTH elevation from high phosphorus-to-calcium ratio, leading to increased bone resorption. This effect is most pronounced when calcium intake is inadequate relative to phosphorus. | Changes; see studies | Small effect | 3 studies | |||
Studies that measured bone mineral density (excess intake) | ||||||
Key findings
- Parathyroid Hormone ElevationImproves (the measure goes up)
- Hyperphosphatemia Management in CKDImproves (the measure goes up)
- Cardiovascular Disease RiskWorsens (the measure goes up)
Safety notes in the studies
- Multiple observational and mechanistic studies associate high serum phosphorus with increased cardiovascular disease risk and mortality, even within the normal reference range.
Shop the evidence-backed picks
Third-party tested Phosphorus products, in the forms the graded studies used where we can match them.
- Grade B
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Studies cited
19 studies from PubMed
- Hyperphosphatemia
- Phosphate Metabolism in Health and Disease
- Phosphate disorders and clinical management of hypophosphatemia and hyperphosphatemia
- Vitamin D and kidney disease
- Secondary Hyperparathyroidism: Pathogenesis, Diagnosis, Preventive and Therapeutic Strategies
- Plant phosphates, phytate and pathological calcifications in chronic kidney disease
- Phosphate-a poison for humans?
- Very low protein diets supplemented with keto-analogues in ESRD predialysis patients and its effect on vascular stiffness and AVF Maturation
- Phosphorus: a new cardiovascular risk factor?
- Improving diet recipe and cooking methods attenuates hyperphosphatemia in patients undergoing peritoneal dialysis
- Canaries in the Phosphate-Toxicity Coal Mines
- Phosphate control in peritoneal dialysis
- Phosphate and carbonate salts of calcium support robust bone building in osteoporosis
- The skeleton: endocrine regulator of phosphate homeostasis
- Phosphorus nutrition and the treatment of osteoporosis
- Primary Disorders of Phosphate Metabolism
- Secondary hyperparathyroidism in severe chronic renal failure is corrected by very-low dietary phosphate intake and calcium carbonate supplementation
- Effect of short-term hypomagnesemia on the chemical and mechanical properties of rat bone
- Calcium homeostasis