What is Phytic Acid?


Phytic acid is a compound found in many plant-based foods, including nuts, seeds, grains, and legumes. It is a natural substance that serves as a storage form of phosphorus in plants. Phytic acid is also known as inositol hexaphosphate or IP6.

Phytic acid has both positive and negative effects on human health. It can interfere with the absorption of minerals such as iron, calcium, and zinc, but it also has antioxidant and anti-cancer properties. In this article, we will explore the benefits and potential harms of phytic acid and how to reduce its amount in foods.

Foods with Phytic Acid

Phytic acid is found in a wide range of plant-based foods, including:

  • Nuts and seeds: almonds, walnuts, cashews, sesame seeds, sunflower seeds, and more.
  • Grains: wheat, rice, barley, oats, and others.
  • Legumes: soybeans, lentils, chickpeas, and others.
  • Vegetables: spinach, broccoli, carrots, and more.

Phytic acid is particularly concentrated in the bran and germ of grains and the outer layer of nuts and seeds. Foods that are high in phytic acid are often considered healthy because they are rich in fiber, vitamins, and minerals. However, phytic acid can also inhibit the absorption of these nutrients.

Phytic Acid Ratio in Foods

The amount of phytic acid in foods varies widely depending on several factors, including the plant species, the soil quality, and the processing methods. Phytic acid content can be influenced by the type of milling or cooking methods used, as well as soaking and fermenting techniques.

The phytic acid content is often expressed in terms of the phytic acid-to-mineral ratio (P/M ratio). The higher the P/M ratio, the more phytic acid is present relative to the minerals. A P/M ratio of 1 or less is considered desirable for optimal mineral absorption.

How to Reduce the Amount of Phytic Acid in Foods

Reducing the amount of phytic acid in foods can increase the bioavailability of nutrients such as iron, calcium, and zinc. Here are some methods that can be used to reduce phytic acid levels in foods:

  • Soaking: Soaking grains, legumes, and nuts in water for several hours or overnight can help break down phytic acid and make nutrients more accessible.
  • Sprouting: Sprouting grains, legumes, and seeds can reduce phytic acid levels and enhance nutrient availability.
  • Fermenting: Fermenting foods like bread, yogurt, and sauerkraut can help reduce phytic acid levels and enhance nutrient absorption.
  • Cooking: Cooking foods can reduce phytic acid levels, although the extent of reduction depends on the cooking method and temperature used.

Benefits of Phytic Acid for Skin

Phytic acid is a popular ingredient in skincare products due to its antioxidant and exfoliating properties. It has been shown to help improve skin texture, reduce fine lines and wrinkles, and even out skin tone.

Phytic acid works by exfoliating the skin and promoting cell turnover. It also has antioxidant properties that can help protect the skin from environmental damage and free radicals. Phytic acid is often used in combination with other skincare ingredients like glycolic acid, retinol, and vitamin C.

Excess of Phytic Acid and Health Problems

Consuming too much phytic acid can lead to mineral deficiencies and health problems. Phytic acid can bind to minerals in the digestive tract, making them less available for absorption. This can lead to deficiencies in iron, zinc, and calcium, which can have negative effects on bone health, immunity, and cognitive function.

  • Phytic acid can also inhibit the activity of digestive enzymes, which can lead to poor digestion and nutrient absorption.
  • Individuals who follow a plant-based diet may be at a higher risk of phytic acid-related mineral deficiencies, as they consume higher amounts of phytic acid-containing foods.
  • Some studies have suggested that consuming high levels of phytic acid may increase the risk of certain types of cancer, such as colon and breast cancer, although more research is needed in this area.
  • Phytic acid may have some positive health effects as well. It has been shown to have antioxidant properties, which can help protect against oxidative stress and inflammation in the body.
  • Some studies have also suggested that phytic acid may have anti-diabetic and cholesterol-lowering effects, although more research is needed in these areas as well.
  • It is important to note that the overall health effects of phytic acid may depend on a variety of factors, including an individual’s overall diet and nutrient status, as well as the amount and source of phytic acid consumed.

Overall, while phytic acid can have both positive and negative effects on human health, it is important to consume a balanced and varied diet that includes a mix of phytic acid-containing foods and foods that are rich in key minerals like iron, calcium, and zinc. Reducing the amount of phytic acid in foods through methods like soaking, sprouting, and fermenting can also be a helpful strategy for enhancing nutrient absorption.


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