Skip to main content
Supplement ScienceSupplementScience

Types of Phosphorus: Forms & Bioavailability

Evidence:Strong
·

This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer

Forms Comparison

FormBioavailabilityBest For
Calcium PhosphateModerateProvides both calcium and phosphorus — used in bone support formulas
Sodium PhosphateHighUsed medically as a laxative (Fleet enema) and in sports performance research for pH buffering
Potassium PhosphateHighMedical use for treating hypophosphatemia

Calcium Phosphate

Bioavailability: Moderate. Best for: Provides both calcium and phosphorus — used in bone support formulas.

Sodium Phosphate

Bioavailability: High. Best for: Used medically as a laxative (Fleet enema) and in sports performance research for pH buffering.

Potassium Phosphate

Bioavailability: High. Best for: Medical use for treating hypophosphatemia.

Full Phosphorus Guide

References

  1. 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
  2. ReviewBuck CL, Wallman KE, Dawson B, Guelfi KJ (2013). Sodium phosphate as an ergogenic aid. Sports Medicine. DOI PubMed
  3. ReviewTakeda E, Yamamoto H, Yamanaka-Okumura H, Taketani Y (2012). Dietary phosphorus in bone health and quality of life. Nutrition Reviews. DOI PubMed
  4. 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
  5. 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
  6. 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