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Phosphorus

Supplement mineral bone & jointenergy
Aka: phosphate, dicalcium phosphate
Brands seen in Singapore: Eidon Ionic Minerals, Boiron
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Bones and teeth; part of atp, DNA and cell membranes
Pros & cons
Pros
  • RDA is 700 mg — most people already exceed it from food
  • Phosphate salts are about 70% absorbed
  • Deficiency is rare and almost never dietary
Cons
  • SG cap of 800 mg sits under the US dv of 1,250 mg
  • Additives add 300–1,000 mg a day on top of food
  • As kidney function falls, phosphate rises
Sources
  1. NIH ODS — Phosphorus Fact Sheet for Health Professionals (Updated: May 4, 2023), Introduction · read 2026-08-27
    what it says
    “Phosphorus is a component of bones, teeth, DNA, and RNA. In the form of phospholipids, phosphorus is also a component of cell membrane structure and of the body’s key energy source, adenosine triphosphate (ATP).”
  2. NIH ODS — Phosphorus Fact Sheet (May 4, 2023), Table 1 RDAs, 19+ years · read 2026-08-27
    what it says
    “Table 1: Recommended Dietary Allowances (RDAs) for Phosphorus … 19+ years 700 mg 700 mg 700 mg 700 mg”
  3. NIH ODS — Phosphorus Fact Sheet (May 4, 2023), Daily Value · read 2026-08-27
    what it says
    “The DV for phosphorus is 1,250 mg for adults and children age 4 years and older”
  4. NIH ODS — Phosphorus Fact Sheet (May 4, 2023), Dietary supplements · read 2026-08-27
    what it says
    “Phosphorus in supplements is usually in the form of phosphate salts … Products typically provide 10% or less of the DV for phosphorus … The bioavailability of phosphate salts is approximately 70%”
  5. NIH ODS — Phosphorus Fact Sheet (May 4, 2023), Phosphorus Intakes and Status · read 2026-08-27
    what it says
    “Most Americans consume more than the recommended amounts of phosphorus.”
  6. NIH ODS — Phosphorus Fact Sheet (May 4, 2023), phosphate additives · read 2026-08-27
    what it says
    “Phosphate additives are estimated to contribute 300 to 1,000 mg to total daily phosphorus intakes, or about 10%–50% of phosphorus intakes in Western countries. The use of phosphate additives is rising”
  7. NIH ODS — Phosphorus Fact Sheet (May 4, 2023), Phosphorus Deficiency · read 2026-08-27
    what it says
    “Phosphorus deficiency (hypophosphatemia) is rare in the United States and is almost never the result of low dietary intakes”
  8. NIH ODS — Phosphorus Fact Sheet (May 4, 2023), Phosphorus and Health — chronic kidney disease · read 2026-08-27
    what it says
    “As kidney function declines, phosphate excretion becomes less efficient and serum phosphate concentration rises. … Increased phosphorus retention often leads to CKD mineral and bone disorder.”
  9. NIH ODS — Phosphorus Fact Sheet (May 4, 2023), Health Risks from Excessive Phosphorus + Table 3 ULs · read 2026-08-27
    what it says
    “High phosphorus intakes rarely produce adverse effects in healthy people. … 19–50 years 4,000 mg … 51–70 years 4,000 mg … 71+ years 3,000 mg”
  10. NIH ODS — Phosphorus Fact Sheet (May 4, 2023), Interactions with Medications · read 2026-08-27
    what it says
    “Antacids that contain aluminum hydroxide … bind phosphorus in the intestines, and their chronic use for 3 months or longer can therefore lead to hypophosphatemia … Antacids containing calcium carbonate … also decrease instestinal absorption of dietary phosphorus”
  11. HSA Singapore — Health Supplements Guidelines (January 2026), clause 4.8 + Table 5 Minerals Limits · read 2026-08-27
    what it says
    “HS for use by the general adult population should not contain vitamins and minerals exceeding the stipulated limits stated in Tables 4 and 5 … Phosphorus 800 mg”
  12. HSA Singapore — Prohibited and Restricted Ingredients in HS and TM, GL-CHPB-1-012 Rev. 001 (Oct 2025), Annex A row 78 · read 2026-08-27
    what it says
    “78. Phosphorus — Restricted use in HS and TM — Maximum Daily Dose: When for oral use by general adult population, the maximum recommended daily dose should not provide more than 800mg”
  13. iHerb Singapore — Phosphorus category page, default “Featured” order, only 4 results (2 of them homeopathic Boiron pellets, 1 an unrelated sulforaphane product) · read 2026-08-27
    what it says
    “Eidon Ionic Minerals, Phosphorus, Liquid Concentrate, 2 oz (60 ml) … Boiron, Phosphorus, 30C, Sleep Aid … Boiron, Phosphorus, 200CK … Metagenics, SulforaClear, 60 Capsules”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.