Leena Watts
Phosphorus is an essential mineral that is naturally present in many foods. It is particularly important for bone health, but also for many other bodily functions. Phosphate additives are also commonly found in processed foods, which can increase shelf life and enhance taste and texture. While phosphorus is good when consumed in moderation, excessive phosphorus intake has been linked to bone loss, and can be dangerous for those with kidney disease. Therefore, it is important to understand how to increase or decrease phosphorus in your diet, depending on your circumstances.
| Characteristics | Values |
|---|---|
| Phosphate deficiency symptoms | Weakness, anemia, increased risk of infection, confusion, weak bones, and muscle damage |
| Phosphate daily intake | Adults: 700 mg, Youth (9-18) and pregnant people: 1250 mg |
| Phosphate-rich foods | Dairy, meat, fish, eggs, vegetables, seeds, grains, processed foods, and sodas |
| Phosphate supplements | Oral supplements, intravenous supplements, and over-the-counter phosphate salts |
| Kidney disease and phosphate | People with kidney disease should limit phosphate intake as their kidneys cannot remove excess phosphorus |
| Phosphate binder | Medication prescribed by a doctor to control phosphate absorption during digestion |
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What You'll Learn
- Phosphate-rich foods: meat, fish, dairy, eggs, vegetables, seeds, grains
- Phosphate supplements: oral, intravenous, over-the-counter, prescription
- Phosphate additives: phosphoric acid, sodium aluminium phosphate, polyphosphates
- Bone health: phosphorus and calcium work together to build strong bones
- Kidney function: kidneys remove excess phosphorus, kidney disease affects this
Phosphate-rich foods: meat, fish, dairy, eggs, vegetables, seeds, grains
Phosphorus is an essential mineral that can be found in many foods. Phosphate-rich foods include meat, fish, dairy, eggs, vegetables, seeds, and grains. Here are some examples of foods from each category that are rich in phosphorus:
Meat:
Processed meats, such as beef, lamb, pork, and chicken, often contain added phosphates to preserve tenderness and juiciness. Light poultry meat, such as chicken and turkey, are also good sources of phosphorus, especially when roasted. Organ meats, like brain and liver, are incredibly nutrient-dense and provide large amounts of phosphorus.
Fish:
Seafood is a great source of phosphorus. Cuttlefish, a mollusk related to squid and octopus, is one of the richest sources, providing 387 mg of phosphorus per 100 g serving. Other phosphorus-rich seafood options include salmon, sardines, and mackerel, which also offer anti-inflammatory omega-3 fatty acids.
Dairy:
Dairy products like milk, cottage cheese, and yogurt are excellent sources of phosphorus. Low-fat and non-fat dairy generally contain more phosphorus than their full-fat counterparts.
Eggs:
Eggs are a good source of phosphorus, with each egg containing around 86 milligrams.
Vegetables:
Beans, lentils, and peas are vegetable sources that provide a significant amount of phosphorus. A half-cup serving of cooked lentils provides about 178-180 mg of phosphorus, which is around 14% of the recommended daily intake.
Seeds and Grains:
Sunflower and pumpkin seeds are rich in phosphorus, providing around 332-341 mg per ounce. However, it's important to note that most of the phosphorus in seeds is in the form of phytic acid, which humans cannot digest. Ancient grains like amaranth and quinoa are also good sources of phosphorus, offering at least 20% of the DV per cooked cup. Additionally, whole grains such as wheat, oats, and rice contain phosphorus, with spelt having the highest amount.
While increasing phosphate intake through diet is generally safe, excessive phosphorus intake, especially from artificial additives, has been linked to potential health risks. It's always a good idea to consult with a healthcare professional before making significant dietary changes or if you have specific health concerns.
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Phosphate supplements: oral, intravenous, over-the-counter, prescription
Phosphate supplements are available in various forms, including oral, intravenous, over-the-counter, and prescription options. Here is a detailed overview of each type:
Oral Phosphate Supplements
Oral phosphate supplements are typically recommended when an individual's phosphate levels are only slightly low, and they are not experiencing any significant symptoms. These supplements are taken by mouth and are available in different forms, such as tablets, capsules, or powders. It is important to follow the instructions provided with the supplement. For example, tablets should be dissolved in water before consumption rather than being swallowed whole. Oral phosphate supplements may contain significant amounts of potassium and sodium, so individuals should consult their healthcare provider if they have any concerns or existing medical conditions.
Intravenous Phosphate Supplements
Intravenous (IV) phosphate supplements are generally recommended for individuals with very low phosphate levels. These supplements are administered directly into the bloodstream through an intravenous line. Potassium phosphate injections are a common form of intravenous phosphate replacement therapy and are used to treat or prevent hypophosphatemia (low phosphorus in the blood). This form of supplementation is often reserved for individuals who cannot take oral phosphate supplements or when rapid correction of phosphate levels is required. Intravenous phosphate supplementation should be administered under the supervision of a healthcare professional due to potential side effects and interactions with other medications.
Over-the-Counter Phosphate Supplements
Over-the-counter (OTC) phosphate supplements are readily available without a prescription. These supplements can be purchased at pharmacies or health stores. When taking OTC phosphate supplements, it is crucial to carefully read and follow the instructions and precautions on the label. Individuals should also disclose any allergies, medical conditions, or other medications they are taking to their healthcare provider before starting an OTC phosphate supplement regimen.
Prescription Phosphate Supplements
Prescription phosphate supplements are provided under the guidance of a healthcare professional and typically reserved for individuals with specific medical conditions or those who require close monitoring of their phosphate levels. These supplements may be recommended when an individual's phosphate levels are severely low or when there are underlying health issues that contribute to phosphate deficiency. Prescription phosphate supplements may come with specific instructions or dosage requirements based on an individual's medical history and current health status.
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Phosphate additives: phosphoric acid, sodium aluminium phosphate, polyphosphates
Phosphate additives are commonly found in processed foods and can account for up to 50% of an individual's daily phosphate consumption in Western countries. These additives include phosphoric acid, sodium aluminium phosphate, and polyphosphates.
Phosphoric Acid
Phosphoric acid (H3PO4) is a food additive used for pH control and flavour enhancement. It is commonly used by beverage manufacturers and food processors. It is a corrosive substance and requires proper ventilation, protective clothing, and chemical-resistant gloves for safe handling.
Sodium Aluminium Phosphate
Sodium aluminium phosphate (SAlP) is an inorganic compound consisting of sodium salts of aluminium phosphates. It is commonly used in baking powders as a chemical leavening agent. When heated, it combines with baking soda to produce carbon dioxide, causing dough to rise. SAlP is also used to maintain freshness, alter texture, and stabilise processed foods.
Polyphosphates
Polyphosphates are commonly used as food additives, although specific information about their function in food was not readily available.
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Bone health: phosphorus and calcium work together to build strong bones
Phosphorus is an essential mineral used to build bones, create energy, and more. It is the second most abundant mineral in the body, with about 85% of the body's phosphorus found in bones and teeth. Phosphorus helps filter out waste in the kidneys and plays an essential role in how the body stores and uses energy. It is also needed for the growth, maintenance, and repair of all tissues and cells, and for the production of DNA and RNA.
Calcium, on the other hand, is a mineral that the body needs to form healthy bones. Bones are the main storage site of calcium in the body. The body cannot produce calcium on its own and relies solely on dietary sources or supplements to meet its needs. If your diet lacks calcium or your body does not absorb enough of it, your bones may weaken or fail to develop properly.
Phosphorus and calcium work together to maintain bone health. A balance between dietary calcium and phosphorus is necessary for proper bone density and the prevention of osteoporosis. When there is more phosphorus than calcium in the body, the body will use the calcium stored in the bones, potentially leading to osteoporosis and dental issues.
To increase phosphate in your diet, consume phosphate-rich foods such as dairy, meat, fish, eggs, and vegetables. Phosphate is also added to many processed foods, including fast food, sodas, spreadable cheeses, puddings, and sauces. However, excessive phosphorus intake has been linked to bone loss, so it is important to consume it in moderation.
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Kidney function: kidneys remove excess phosphorus, kidney disease affects this
Phosphorus is a mineral found in bones and is essential for building strong and healthy bones. It is also important for creating energy and other bodily functions. While phosphorus is naturally present in many foods, some processed foods also contain large amounts of phosphorus as additives.
When kidneys are functioning normally, they remove excess phosphorus from the blood. However, when an individual has chronic kidney disease (CKD), their kidneys cannot remove phosphorus effectively. This can lead to a build-up of phosphorus in the body, which can have adverse effects. High phosphorus levels can cause changes in the body that result in calcium being pulled out of the bones, making them weak. Additionally, high phosphorus and calcium levels can lead to dangerous calcium deposits in the blood vessels, lungs, eyes, and heart, increasing the risk of heart attack, stroke, or even death.
Therefore, for individuals with kidney disease, managing phosphorus intake becomes crucial. It is important to read labels and look for ingredients with "phosphate" or "phos" in their names, such as phosphoric acid, sodium aluminum phosphate, pyrophosphate, polyphosphates, and calcium phosphate. These additives are commonly found in processed meats, cola beverages, and baked goods. By limiting or avoiding these foods, individuals with kidney disease can help control their phosphorus intake.
Dialysis can also remove some phosphorus from the blood. Additionally, a doctor may prescribe a phosphate binder to be taken with meals and snacks, which helps control phosphorus absorption. Working with a renal dietitian can help individuals with kidney disease navigate a kidney-friendly food plan to maintain their mineral balance.
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Frequently asked questions
Phosphate is found naturally in dairy, meat, fish, eggs, and vegetables. It is also found in seeds and grains, but it is harder for the body to absorb phosphate from those foods. Phosphate is also added to many processed foods, including fast food, sodas, cheeses, puddings, and sauces.
Low phosphate levels can cause weakness, anemia, an increased risk of infection, and confusion. It can also lead to weak bones and muscle damage.
You can increase phosphate levels by consuming phosphate-rich foods and supplements. It is important to speak with your doctor to identify the root cause of low phosphate levels and determine the appropriate course of action.
