
Citric acid is a common food additive used to enhance flavour and preserve ingredients. It is also used in the pharmaceutical and cosmetic industries. While it is generally safe to consume, some people may experience irritation or allergic reactions. Citric acid is found naturally in citrus fruits such as lemons and limes, and it is also produced synthetically as an additive. Adding citric acid to your diet may offer benefits such as improved skin health, better mineral absorption, and protection against kidney stones. However, it is important to consult a healthcare professional before making any significant changes to your diet or taking citric acid supplements.
| Characteristics | Values |
|---|---|
| Natural Sources | Citrus fruits, berries and other fruits and vegetables |
| Additives | Food, cosmetics, supplements, cleaning agents |
| Benefits | Antioxidant, alkalizing, anti-inflammatory, improves skin health, fights kidney stones, improves endothelial functions |
| Taste | Pleasantly sweet and tart |
| State | Solid |
| pH | Low |
| Molecular Formula | C6H8O7 |
| Atoms | Six carbon, eight hydrogen, seven oxygen |
| Solubility | Dissolves easily in water |
| Use in Food | Boost acidity, enhance flavour, preserve ingredients |
| Use in Medicine | Stabilise and preserve active ingredients, enhance or mask taste of chewable and syrup-based medications |
| Use in Supplements | Enhance absorption of minerals |
| Use in Cosmetics | Form alpha hydroxy acid, smooth skin, increase shelf life |
| Use in Cleaning Products | Eat away at hard water buildup |
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What You'll Learn

Eat more citrus fruits, like lemons, limes, and berries
Citric acid is a natural ingredient found in many foods, including lemons, limes, and other citrus fruits, which are the predominant natural sources of citric acid. It is also found in berries, although in lesser amounts. The juice of lemons and limes is especially rich in citric acid.
Citrus fruits are an excellent source of natural citric acid, and increasing your intake of these fruits is a great way to add citric acid to your diet. Eating more citrus fruits, such as lemons, limes, and berries, can offer a range of health benefits due to the presence of citric acid. For example, citric acid can help prevent kidney stones by making your urine less favourable for the formation of stones. Consuming foods high in natural citric acid can provide similar benefits to taking citric acid supplements for preventing kidney stones.
Additionally, citric acid has antioxidant, alkalizing, and anti-inflammatory effects, and it can improve skin health. It also aids in energy metabolism and the absorption of minerals. The health benefits of citric acid make it a valuable component of a healthy diet.
To get the most juice out of your citrus fruits, try rolling them on a hard surface while pressing down with your palm. Alternatively, you can heat them for about 20 seconds in the microwave before cutting into them. This will help you maximise the amount of citric acid you get from each fruit.
Citrus fruits are a delicious and nutritious way to increase your intake of citric acid, offering a range of potential health benefits. By incorporating more of these fruits into your diet, you can enjoy the benefits of citric acid while also enjoying their refreshing taste.
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Try calcium citrate supplements to prevent kidney stones
Citric acid is a natural ingredient found in several fruits and vegetables, especially citrus fruits like lemons and limes. It is also produced synthetically and used as a common food additive. Citric acid has several benefits, including antioxidant, alkalizing, and anti-inflammatory effects, and it can help fight kidney stones.
Kidney stones, specifically calcium oxalate stones, are formed when urine contains more calcium and oxalate than the fluid can dilute. This causes the calcium and oxalate to form crystals, which can be prevented by citrate, a substance that stops the crystals from sticking together. Citric acid can be used to treat kidney stones, and consuming foods rich in this natural acid can help prevent them.
Calcium is an essential part of a healthy diet, particularly for bone health, regulating blood pressure, and aiding muscle function. However, calcium oxalate kidney stones are a common problem, and those with a history of these stones are often advised to avoid oxalate-rich foods. This can be challenging, as many foods, including fruits, vegetables, nuts, and chocolate, have high oxalate levels.
To address this issue, calcium citrate supplements are recommended for people at risk of kidney stone formation. These supplements help increase urinary citrate excretion, creating an environment that prevents the formation of kidney stones. The suggested dose is 200-400 mg if dietary calcium cannot be increased. It is important to note that calcium carbonate supplements should be taken with meals to reduce oxaluria, while taking them at bedtime will not have the same effect.
In addition to supplements, increasing fluid intake and consuming calcium-rich foods or beverages at each meal can help lower the risk of kidney stones. For those who cannot consume dairy products, calcium supplements or pills can be an alternative. It is always advisable to consult a healthcare provider before taking any supplements.
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Use citric acid to smooth your skin and treat acne
Citric acid is an alpha-hydroxy acid (AHA) that is naturally found in citrus fruits such as lemons, grapefruits, limes, and oranges. It is a common ingredient in cosmetics and skincare products due to its ability to act as a chemical exfoliant and provide antioxidant benefits. When used in skincare, citric acid helps to dissolve the bonds that keep dead skin cells stuck to the surface of the skin, promoting cell turnover and unclogging pores. This makes it particularly beneficial for those with oily and acne-prone skin, as it gently removes excess oil and dirt without stripping away essential oils or depleting skin moisture levels.
To incorporate citric acid into your skincare routine, look for products that contain this ingredient, such as cleansers, toners, or masks. For example, Face Reality offers an Antioxidant Scrub that contains citric acid, witch hazel, green tea, and panthenol, which is beneficial for acne-prone skin. You can also find citric acid in SkinCeuticals' Blemish + Age Defense formula, which treats acne while targeting signs of ageing. When introducing citric acid to your routine, it is recommended to start slowly and use products containing this ingredient two to three times per week.
If you prefer a more natural approach, you can create a DIY remedy by diluting citric acid with water and milk, which can be particularly effective for acne-prone skin. However, it is important to exercise caution when handling pure citric acid crystals, as they can be irritating to the skin.
While citric acid is generally considered safe for all skin types, those with known allergies, sensitive skin, or citrus allergies should be cautious. In rare cases, mould residues from the manufacturing process may trigger allergies, and there have been reports of adverse reactions to the additive, including joint pain, muscular and stomach pain, and shortness of breath. Therefore, it is always recommended to perform a patch test before incorporating a new product into your skincare routine.
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Citric acid can be used as a disinfectant and preservative
Citric acid is a natural ingredient in many foods, particularly citrus fruits like lemons and limes. It is also produced synthetically as an additive. Citric acid is odourless and colourless, and has a sweet and tart taste.
Citric acid is widely used as a disinfectant and preservative. Its antibacterial qualities make it an effective disinfectant, killing bacteria, mould, and mildew. It is also anti-fungal. It can be used as a natural alternative to bleach, and is often used to disinfect stainless steel, butcher block, and laminate counters, as well as electronic screens. A solution of citric acid and water can be used to clean surfaces, and it can also be used to descale, removing soap scum, hard water stains, and lime.
Citric acid is also used as a preservative in the food industry. It is added to canned fruits and vegetables to protect against botulism, a serious illness caused by the Clostridium botulinum bacterium. It is also added to sodas, juices, powdered beverages, candies, frozen foods, and some dairy products to boost acidity, enhance flavour, and preserve ingredients. In addition, citric acid is used as a preservative in the pharmaceutical industry, helping to stabilise and preserve the active ingredients in medicines.
Citric acid is generally recognised as safe by the Food and Drug Administration (FDA) and the U.S. Environmental Protection Agency (EPA). However, there have been reports of allergic reactions and irritation to the skin, eyes, nose, and throat. Therefore, it is important to protect the skin and eyes and ensure proper ventilation when working with citric acid.
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Drink lemon juice or vinegar to add citric acid to your diet
Drinking lemon juice or vinegar is an easy way to add citric acid to your diet. Lemon juice is naturally rich in citric acid, and vinegar can be used as a substitute for citric acid powder.
Lemon juice has a pH of about 2 or 3, and it is a good source of vitamin C and fiber. It is also thought to have acne-fighting properties. Lemon juice is also believed to have alkalizing effects in the body, which some sources attribute to its potential health benefits.
However, it is important to consume citric acid in moderation. Excessive consumption can wear away tooth enamel, making teeth more sensitive and prone to cavities. It can also cause nausea or vomiting if taken with certain medications. To minimize these risks, it is recommended to rinse your mouth after consuming acidic foods or drinks, use a straw, and include less acidic foods in your diet.
Citric acid is also found in other citrus fruits and their juices, such as limes, oranges, and grapefruit. It is a common food additive, used to enhance flavor, preserve ingredients, and boost acidity. It is estimated that the food and beverage industry utilizes about 70% of manufactured citric acid.
In addition to its use in the food industry, citric acid is also used in pharmaceuticals, dietary supplements, and cleaning agents. It has antioxidant, alkalizing, and anti-inflammatory properties, and it can help protect against kidney stones.
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Frequently asked questions
Citric acid is a type of alpha hydroxy acid (AHA) that is found naturally in citrus fruits. It is also produced synthetically as a common food additive.
Citric acid has antioxidant, alkalizing, and anti-inflammatory effects. It can also help improve skin health, fight kidney stones, and enhance the absorption of minerals.
Citric acid is found naturally in citrus fruits and their juices, such as lemons, limes, and berries. It is also added to processed foods such as sodas, juices, candies, frozen foods, and some dairy products.


















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