General Dosage
700mg daily (RDA for adults); most people exceed this through diet alone
Maximum dose: 4,000mg/day (NIH UL for adults 19-70); 3,000mg for those over 70
Phosphorus Dosage Guide
Evidence:Strong
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Dosage Recommendations
General recommendation: 700mg daily (RDA for adults); most people exceed this through diet alone
Timing: With meals; maintain balanced intake with calcium for optimal bone health • Take with food for best absorption.
Dosage by Condition
Hypophosphatemia
As directed by physician — typically IV or oral phosphate saltsStrong
Athletic pH buffering
50mg/kg sodium phosphate loading over 3-6 days before competitionEmerging
General bone health
Adequate dietary intake (700mg) with balanced calcium:phosphorus ratioStrong
| Condition | Recommended Dose | Evidence |
|---|---|---|
| Hypophosphatemia | As directed by physician — typically IV or oral phosphate salts | Strong |
| Athletic pH buffering | 50mg/kg sodium phosphate loading over 3-6 days before competition | Emerging |
| General bone health | Adequate dietary intake (700mg) with balanced calcium:phosphorus ratio | Strong |
Upper limit: 4,000mg/day (NIH UL for adults 19-70); 3,000mg for those over 70
Timing & Absorption
With meals; maintain balanced intake with calcium for optimal bone health
Best taken with food for optimal absorption.
References
- ReviewCalvo MS, Uribarri J (2013). Public health impact of dietary phosphorus excess on bone and cardiovascular health in the general population. American Journal of Clinical Nutrition. DOI PubMed
- ReviewBuck CL, Wallman KE, Dawson B, Guelfi KJ (2013). Sodium phosphate as an ergogenic aid. Sports Medicine. DOI PubMed
- ReviewTakeda E, Yamamoto H, Yamanaka-Okumura H, Taketani Y (2012). Dietary phosphorus in bone health and quality of life. Nutrition Reviews. DOI PubMed
- Meta-analysisWu Y, Chen C, Wang G (2024). Inoculation with arbuscular mycorrhizal fungi improves plant biomass and nitrogen and phosphorus nutrients: a meta-analysis.. BMC plant biology. DOI PubMed
- Meta-analysisHuang LL, Zhou HL, Wang QF, Zhao XR, et al. (2024). Responses of plant carbon, nitrogen, and phosphorus content in terrestrial ecosystems to warming: A Meta-analysis.. Ying yong sheng tai xue bao = The journal of applied ecology. DOI PubMed
- Nessel MP, Konnovitch T, Romero GQ, González AL (2021). Nitrogen and phosphorus enrichment cause declines in invertebrate populations: a global meta-analysis.. Biological reviews of the Cambridge Philosophical Society. DOI PubMed