Phosphorus Dosage Guide
Recommended daily intake by age and gender — based on NIH Dietary Reference Intakes.
Our assessment
Based on the data provided, high phosphorus intakes from all sources seldom cause problems in healthy people. However, the safety profile is defined by strict daily upper limits, which include intakes from food, beverages, and supplements. Exceeding these limits is not recommended unless a healthcare provider advises it. Data not available on specific adverse event report counts from FDA data.
How it works
Phosphorus is an essential mineral that works with calcium to build bones and teeth. The body regulates phosphorus levels carefully, but interactions with certain medications can alter its absorption. Based on FDA data, specific side effect reports are not provided in the available data.
Safety profile
Side effects from FDA data: Data not available — no specific adverse event reports or counts were provided in the data set for phosphorus. The data confirms that healthy people seldom experience problems from high phosphorus intakes, but this may not apply to individuals with kidney disease or those taking certain medications.
Our recommendation
Do not exceed the daily upper limits for phosphorus from all sources unless your healthcare provider recommends it. Be cautious if you take antacids containing aluminum hydroxide or calcium carbonate (such as Maalox), as these can reduce the amount of phosphorus your body absorbs FDA FAERS ↗. Individuals with kidney conditions should consult their doctor before consuming phosphorus supplements. Data not available on specific dose thresholds for adverse effects.
AI-assisted analysis. Data sourced from NIH ODS.
Understanding RDAs
Dietary Reference Intakes (DRIs) are a set of reference values used to plan and assess nutrient intakes of healthy people. They include:
- RDA (Recommended Dietary Allowance) — The average daily intake sufficient to meet the nutrient requirements of nearly all (97-98%) healthy individuals.
- AI (Adequate Intake) — Established when evidence is insufficient to develop an RDA. Based on observed nutrient intake by healthy people.
- UL (Tolerable Upper Intake Level) — The maximum daily intake unlikely to cause adverse health effects. Exceeding the UL increases the risk of toxicity.
Values vary by age, gender, and life stage (pregnancy, lactation).
Source: National Academies of Sciences, Engineering, and Medicine
Recommended Dietary Allowance
| Life Stage | Recommended Amount |
|---|---|
| Birth to 6 months | 100 mg |
| Infants 7–12 months | 275 mg |
| Children 1–3 years | 460 mg |
| Children 4–8 years | 500 mg |
| Children 9–13 years | 1,250 mg |
| Teens 14–18 years | 1,250 mg |
| Pregnant and breastfeeding teens | 1,250 mg |
| Adults 19 years and older | 700 mg |
| Pregnant and breastfeeding women | 700 mg |
Source: National Academies of Sciences, Engineering, and Medicine