Phosphorus

Essential macromineral crucial for bone health, energy metabolism, cellular function, and DNA synthesis, working closely with calcium for optimal skeletal health

Scientific namePhosphorus FormulaP Molecular weight30.97 g/mol CAS7723-14-0

80 absorption score

8 safety / 10

15 USD per month

5 documented interactions

Check it against something

Evidence level A

Phosphorus with:

46 out of 100

Needs attention Separate by 2-4 hours to avoid the interaction below.

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What it does

mechanism and evidence for each claim

Bone and teeth formation and strength

Essential for proper bone and tooth development and maintenance

Forms calcium phosphate crystals providing bone matrix strength Evidence A-grade 8-24 weeks

Energy metabolism and ATP production

Critical for cellular energy production and metabolism

Component of ATP, ADP, and phosphocreatine energy systems Evidence A-grade 1-4 weeks

Cellular membrane structure and function

Essential for cell membrane integrity and cellular processes

Key component of phospholipids forming cell membrane structure Evidence A-grade 2-8 weeks

DNA and RNA synthesis

Required for genetic material synthesis and cellular reproduction

Essential component of nucleic acid backbone structure Evidence A-grade 1-4 weeks

Acid-base balance regulation

Helps maintain proper pH balance in blood and tissues

Phosphate buffer system regulates acid-base homeostasis Evidence A-grade 1-2 weeks

Others take these for the same thing

Same goal, different mechanism — check any of them against this one

Calcium Bone health & muscle function 1,000-1,200 mg A 30% Turmeric Anti-inflammatory & antioxidant 300-1000mg A 3% Ashwagandha Stress management & energy 300-600mg A 75% Vitamin B12 (Cyanocobalamin) Energy & nerve support 250-1000 mcg A 70% Coenzyme Q10 (CoQ10) Heart health & cellular energy 100-200mg A 10% Vitamin D3 Bone health & immune support 1000-2000 IU A 85%

Every pair we checked

12 combinations scored by the engine

Phosphorus + Calcium Carbonate Very high calcium may reduce phosphorus absorption Needs attention 64

Phosphorus + Caffeine No documented interaction either way No known interaction 70

Phosphorus + Creatine Monohydrate No documented interaction either way No known interaction 70

Phosphorus + Whey Protein No documented interaction either way No known interaction 70

Phosphorus + Lactase No documented interaction either way No known interaction 70

Phosphorus + Bovine Collagen No documented interaction either way No known interaction 70

Phosphorus + DHA No documented interaction either way No known interaction 70

Phosphorus + Turmeric No documented interaction either way No known interaction 70

Phosphorus + Fish Oil (EPA/DHA) No documented interaction either way No known interaction 70

Phosphorus + Marine Collagen No documented interaction either way No known interaction 70

Phosphorus + Magnesium Oxide Improved bone health and mineral metabolism Works better together 78

Phosphorus + Vitamin D3 Enhanced phosphorus absorption and bone mineralization Works better together 82

Dosage

With meals

Daily700-1250mg

Bone health support700-1250mg daily

Energy metabolism700-1000mg daily

Cellular function700-1000mg daily

Deficiency correctionAs medically directed

Upper limit 4000 mg NIH ODS

Before you take it

VeganYes

When to expect it

First Effects1-2 weeks for initial energy and cellular function improvements

Peak Benefits8-16 weeks for sustained bone health and metabolic benefits

Deficiency DevelopmentRare due to widespread food sources

Toxicity OnsetRisk mainly with kidney disease or excessive supplementation

How to measure it

$50-100

MarkerSerum phosphorus, parathyroid hormone, alkaline phosphatase, kidney function

OptimalSerum phosphorus 2.5-4.5 mg/dl, normal PTH levels

Deficient belowSerum phosphorus <2.5 mg/dl

FrequencyEvery 6-12 months, more frequent with kidney disease

What people actually reported to the FDA

CAERS, 1 reports naming it as the suspect

Most reported effects

Gait disturbance 1

Muscle spasms 1

Tremor 1

Named as the suspect 1 reports of 2 that mention it at all

Serious outcome 100% hospitalisation, emergency room or worse

Other Serious or Important Medical Event1

Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →

What actually reaches you

The label counts the carrier, your body does not

Absorption Very high 80 of 100 · best absorbed form of this compound

Delivered daily 780 mg

Cost per 100 mg delivered $0.06 comparative — uses the absorption score, not a measured percentage

Works better with

3 documented

Calcium

Essential synergy for optimal bone health and formation

Forms calcium phosphate crystals providing bone strength · level A

Vitamin D

Enhanced phosphorus absorption and bone mineralization

Vitamin D increases phosphorus absorption and utilization · level A

Magnesium

Improved bone health and mineral metabolism

Magnesium supports bone formation and mineral balance · level B

What not to take with Phosphorus

2 documented

Excessive Calcium

Very high calcium may reduce phosphorus absorption

Calcium-phosphorus balance affects mutual absorption · moderate significance

Aluminum Antacids

Aluminum binds phosphorus reducing absorption

Aluminum forms insoluble phosphorus compounds · moderate significance

Medication interactions

Discuss these with a pharmacist before combining

phosphate-binders High

Medications used to reduce phosphorus absorption

What to do: Avoid phosphorus supplements with phosphate binders

vitamin-d-analogs Moderate

May increase phosphorus absorption significantly

What to do: Monitor phosphorus levels with vitamin D therapy

Available forms

bioavailability compared

Dicalcium Phosphate (Most Common Supplemental Form) 80

Dicalcium Phosphate (Most Common Supplemental Form): Essential bone health, Energy metabolism, Cellular function, Well absorbed

Food sources

before you supplement

Meat, poultry, fish 200-400mg per 100g · 85

Dairy products 90-200mg per 100g · 80

Nuts and seeds 300-600mg per 100g · 70

Whole grains 100-400mg per 100g · 60

Too little

deficiency signs

Phosphorus deficiency symptoms (very rare):
Bone pain, weakness, and increased fracture risk
Muscle weakness and respiratory failure
Loss of appetite and general weakness
Increased susceptibility to infections
Altered mental status and confusion
Rickets in children (extremely rare)

Too much

toxicity signs

Phosphorus excess symptoms:
Calcium absorption interference and deficiency
Elevated parathyroid hormone levels
Bone demineralization and weakness
Kidney function impairment
Soft tissue calcification
Most problematic in kidney disease patients

Who benefits most

bone-health-support

Bone and tooth development and maintenance support

700-1250mg daily

energy-metabolism-enhancement

Cellular energy production and ATP synthesis support

700-1000mg daily

growing-children-adolescents

Essential for rapid bone growth and development

500-1250mg daily (age-dependent)

cellular-function-optimization

Cell membrane integrity and DNA synthesis support

700-1000mg daily

phosphorus-deficiency-rare

Very rare deficiency correction in malabsorption

As medically directed

Where to buy it

compare forms first

Look for Phosphorus at 700-1250mg per serving. The form that matters here is Dicalcium Phosphate (Most Common Supplemental Form).

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What else affects it

Beyond other supplements

Excessive calcium

Very high calcium may reduce phosphorus absorption

Calcium-phosphorus balance affects mutual absorption

How it works

Forms hydroxyapatite crystals with calcium providing bone matrix strength
Essential component of ATP, ADP, and phosphocreatine energy storage systems
Key structural component of phospholipids forming cell membrane bilayers
Critical component of DNA and RNA nucleic acid backbone structure
Functions as phosphate buffer system maintaining pH homeostasis
Required for protein phosphorylation regulating cellular processes

Key findings

what the evidence supports

Extensive evidence for essential bone health and formation
Critical for cellular energy metabolism and ATP production
Important for DNA synthesis and cellular reproduction
Deficiency extremely rare due to widespread food sources

Sources: NIH Examine.com · data reviewed 2026-08-02

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of Phosphorus?

Documented effects: Bone and teeth formation and strength; Energy metabolism and ATP production; Cellular membrane structure and function; DNA and RNA synthesis. Essential for proper bone and tooth development and maintenance

How much Phosphorus should you take per day?

The common daily range is 700-1250mg. By goal — bone health support: 700-1250mg daily; energy metabolism: 700-1000mg daily; cellular function: 700-1000mg daily; deficiency correction: As medically directed.

When is the best time to take Phosphorus?

With meals. First effects are typically reported within 1-2 weeks for initial energy and cellular function improvements.

What are the side effects of Phosphorus?

At excessive doses: Phosphorus excess symptoms:, Calcium absorption interference and deficiency, Elevated parathyroid hormone levels, Bone demineralization and weakness, Kidney function impairment. Safety rating at normal doses is 8 out of 10.

What should you not take with Phosphorus?

Separate it from Excessive Calcium, Aluminum Antacids by two to four hours. Very high calcium may reduce phosphorus absorption

Does Phosphorus interact with medications?

Documented interactions with phosphate-binders, vitamin-d-analogs. Discuss these with a pharmacist before combining.

How much Phosphorus is too much?

The tolerable upper intake level is 4000 mg per day for adults, per NIH ODS. Above that, the risk of adverse effects rises: Phosphorus excess symptoms:, Calcium absorption interference and deficiency, Elevated parathyroid hormone levels.

How do you know if you need Phosphorus?

The marker is Serum phosphorus, parathyroid hormone, alkaline phosphatase, kidney function, optimal range Serum phosphorus 2.5-4.5 mg/dl, normal PTH levels. Common deficiency signs: Phosphorus deficiency symptoms (very rare):, Bone pain, weakness, and increased fracture risk, Muscle weakness and respiratory failure, Loss of appetite and general weakness.

Taken for

62 Energy & Metabolism

Vitamin B12 (Methylcobalamin) · Ashwagandha · Vitamin B12 (Cyanocobalamin)

38 Joints & Bones

Vitamin D3 · Calcium Carbonate · Bovine Collagen