
Silica, also known as silicon dioxide, is a natural compound composed of silicon and oxygen, the two most abundant elements in the Earth's crust. While silica is found in many foods, its role in the human body is not yet fully understood. However, growing evidence suggests that silica may be an important trace element for our health, particularly for bone formation and maintenance. Additionally, silica is believed to support hair, skin, and nail health by aiding collagen production. To increase your silica intake, consider consuming silica-rich foods such as green beans, leafy greens, bananas, strawberries, almonds, and oats. Alternatively, silica supplements are also available, but it is always recommended to consult with a healthcare professional before starting any new supplement regimen.
| Characteristics | Values |
|---|---|
| Silica-rich foods | Strawberries, mangoes, apples, oranges, honey, almonds, oats, green beans, raw cabbage, carrots, leeks, pumpkin, celery, cucumbers, asparagus, rhubarb, spinach, mustard greens, lettuce, endive, nettle, seafood, soybeans, tofu, beets, bell peppers, cherries, corn, eggplant, figs, fish, grapes, kelp, nuts, seeds, peanuts, sunflower seeds, flaxseeds, raisins, root vegetables, potatoes, sweet potatoes, fresh turmeric, onions, garlic, ginger, tomatoes, whole grains, brown rice, roti, lentils, beer, natural water, zeolite, alfalfa, bamboo, horsetail, and more |
| Silica supplements | MSM, horsetail extract, cellfood essential silica formula |
| Recommended silica intake | The FDA recommends no more than 10-30 grams, or 2% of your daily food intake (500-1,500 grams) per day |
| Average silica intake | The average American diet contains about 30 mg of silicon per day |
| Health benefits | Growing evidence suggests silica may improve bone formation and maintenance, increase bone mineral density, improve collagen production, and support hair, skin, nail, and overall health |
| Health risks | Inhaling small particles of silica can increase the risk of developing serious silica-related diseases such as lung disease; there is limited evidence on the effects of silica deficiency or excess |
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What You'll Learn
- Eat silica-rich foods like strawberries, mangoes, nuts, and seeds
- Drink silica-rich water, such as nakd water
- Take silica supplements like MSM, horsetail extract, or Cellfood Essential Silica Formula
- Consume more whole grains and cereals, especially oats and oat bran
- Include silica-rich vegetables in your diet, such as green beans, spinach, and root vegetables

Eat silica-rich foods like strawberries, mangoes, nuts, and seeds
Eating silica-rich foods is a great way to increase your silica intake. Silica, or silicon dioxide, is a chemical element composed of silicon and oxygen, the two most common elements in the Earth's crust. It is found naturally in many foods, especially those that grow underground, like potatoes and beets.
Strawberries, mangoes, nuts, and seeds are all excellent sources of silica. The highest concentration of silica in these fruits is found in the fibres emanating from the pit of the mango and the seeds of the strawberries.
Nuts and seeds, such as almonds, peanuts, sunflower seeds, and flaxseeds, are also rich in silica. These foods provide a good source of silica due to their high fibre content.
In addition to the above-mentioned foods, silica is also found in high concentrations in green beans, bananas, spinach, and oats. A cup of green beans contains about 7 milligrams of silica, while a medium-sized banana contains 4.77 milligrams of silicon dioxide. Two tablespoons of oat bran provide 3.27 milligrams of silica, and a 2-tablespoon serving of spinach contains 4.1 milligrams.
By incorporating these silica-rich foods into your diet, you can increase your silica intake and potentially enhance your overall health. However, it is important to note that the recommended daily intake of silica is between 10 and 30 grams, or 2% of your daily food intake (500-1,500 grams), as advised by the Food and Drug Administration (FDA).
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Drink silica-rich water, such as nakd water
Silica, or silicon dioxide, is a natural compound composed of silicon and oxygen, the two most common elements in the Earth's crust. It is found all around us in nature, including in granite, sand, quartz, and other types of rocks. Silica is also present in the human body and many common foods such as fruits, vegetables, and cereals.
While the function of silica in the human body is not yet fully understood, growing evidence suggests that it may be an important trace element for our health. Some people take silica supplements or consume silica-rich foods and beverages in the belief that it can strengthen bones and support hair, skin, and nail health.
One way to add silica to your diet is by drinking silica-rich water, such as nakd water. nakd water is sourced from the Bay of Plenty on New Zealand's North Island, one of the world's oldest and purest artesian water sources. The water undergoes at least 50 years of natural filtration through porous volcanic rock, which enriches it with minerals like silica. With a neutral pH of 7.0 and low levels of nitrates, nakd water is known for its soft, pure taste.
In addition to nakd water, there are several other brands of bottled water that are high in silica. These include Antipodes still water from New Zealand, with 73 mg/l of silica, and Three Bays Still Artesian Water from Australia, with 47 mg/l of silica. Waiakea Hawaiian Volcanic Water and Gerolsteiner Sparkling Mineral Water are also notable options, containing 44 mg/l and 40.2 mg/l of silica, respectively.
By drinking silica-rich water, you can increase your silica intake and potentially harness the health benefits associated with this essential mineral.
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Take silica supplements like MSM, horsetail extract, or Cellfood Essential Silica Formula
Methylsulfonylmethane (MSM) is a chemical that occurs naturally in humans, green plants, and animals. It can also be made in a lab. While there is no recommended dietary allowance (RDA) for MSM, it is commonly used for osteoarthritis, as it can help reduce pain and swelling and improve function in people with this condition. MSM is also used for other conditions, such as poor circulation, ageing skin, and hay fever, although there is limited scientific evidence to support these uses.
Horsetail is a fern that contains silica and other beneficial compounds, including antioxidants. It has been used as an herbal remedy for thousands of years, and limited scientific evidence supports its potential health benefits. Horsetail is believed to aid bone healing and improve bone density, making it potentially useful for bone diseases such as osteoporosis. Additionally, horsetail has diuretic properties and has been studied for its potential therapeutic effects on kidney conditions and urinary issues. It also demonstrates anti-inflammatory, antimicrobial, and antioxidant activity in test-tube studies.
Cellfood Essential Silica Formula is a supplement that combines silica with Cellfood, a nutrient supplement. Silica supplementation is believed to provide foundational support for bones, joints, muscles, and connective tissue. As silica levels decrease with age, supplementation may be beneficial for maintaining healthy bones, joints, skin, nails, hair, teeth, and gums. Silica is also known for its anti-aging properties, as it can help form collagen and repair damaged skin.
When considering silica supplements, it is important to speak with a healthcare provider to determine the most suitable product and dosage for your specific needs and health circumstances.
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Consume more whole grains and cereals, especially oats and oat bran
Consuming silica-rich whole grains and cereals, especially oats and oat bran, is an excellent way to boost your silica intake. Silica, a chemical element found abundantly in the Earth's crust, is a natural compound composed of oxygen and silicon. It occurs naturally in many foods, including fruits, vegetables, cereals, and mineral water.
Oats and oat bran are particularly rich in silica. According to studies, oat bran has one of the highest silicon contents among cereal products, with 14.03 mg/100 g. Additionally, two tablespoons of oat bran provide 3.27 milligrams of silica. Whole grain and wholegrain products generally contain higher amounts of silicon than refined products.
To incorporate more oats and oat bran into your diet, consider the following:
- Start your day with a nutritious bowl of oatmeal. Use traditional rolled oats or opt for steel-cut oats for a chewier texture. Top it with fresh fruits, nuts, and a drizzle of honey for a well-rounded breakfast.
- Include oat bran in your baking recipes. Substitute a portion of the flour in cookies, muffins, or bread with oat bran to boost the silica content and add a nutty flavour to your baked goods.
- Experiment with overnight oats. Soak oats in milk or yoghurt and add your favourite toppings, such as berries, chia seeds, or cinnamon. This convenient option makes for a quick and tasty breakfast or snack.
- Create your own granola by mixing oats with nuts, seeds, and dried fruits. Granola can be enjoyed with milk or yoghurt, sprinkled over smoothies, or even as a crunchy topping for yoghurt parfaits.
By regularly including oats and oat bran in your meals and snacks, you can effectively increase your silica intake and potentially reap the associated health benefits. Remember to vary your sources of silica and consult with a healthcare professional if you have specific concerns or questions about your silica consumption.
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Include silica-rich vegetables in your diet, such as green beans, spinach, and root vegetables
Silica, or silicon dioxide, is a natural compound composed of silicon and oxygen, the two most common elements in the Earth's crust. It is found in many foods and is also added to numerous food products and supplements.
While silica is widely believed to be essential for human health, its specific function in the body is still unclear. Nevertheless, silica is thought to play a crucial role in bone formation and maintenance, potentially through its involvement in bone mineralisation. Additionally, silica may support collagen production, which is necessary for maintaining skin elasticity and providing structure to organs and joints.
If you're looking to add more silica to your diet, silica-rich vegetables are an excellent way to do so. Green beans are one of the most silica-rich vegetables, with one cup providing approximately 7 milligrams of silica, which equates to 25% to 35% of the average American's silica intake. Spinach is another leafy green vegetable that is high in silica, offering 4.1 milligrams in just two tablespoons.
Root vegetables, such as beets and carrots, are also good sources of silica. The highest concentration of silica is found in the skin or peel of these vegetables, so be sure to keep the skin on when preparing them. Other root vegetables that contain silica include garlic, ginger, onions, potatoes, and sweet potatoes. By incorporating these silica-rich vegetables into your meals, you can easily boost your silica intake through whole foods.
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Frequently asked questions
Silica, or silicon dioxide, is a natural compound made of two of the earth’s most abundant materials: silicon and oxygen. It is found in the Earth's crust and in commercial and industrial materials.
There is growing evidence that silica may play a key role in bone formation and maintenance. It is also believed to be an essential nutrient that our bodies need.
Silica is found naturally in many foods, including fruits, vegetables, cereals, and mineral water. Some silica-rich foods include green beans, bananas, spinach, lentils, beer, and oats.
While silica is generally well-tolerated and doesn't appear to have negative effects when consumed, inhaling small particles of it can increase the risk of developing serious silica-related diseases such as lung disease.









































