What Foods Contain Silicon? Full List + Daily Intake Guide

Silicon is a trace mineral found mainly in plant-based foods such as whole grains, vegetables, fruits, and nuts. It plays a role in bone, skin, and connective tissue health. The richest dietary sources include oats, barley, green beans, bananas, and leafy greens.

The natural silicon contained in food is in the form of silicon dioxide (SiO₂). Silicon Dioxide is not only important for the normal development of bones, but also necessary for maintaining healthy skin, hair and nails. Plant foods contain high silicon content, such as cereals, which contain a large amount of SiO₂. On the other hand, the silicon oxide content of animal food is relatively low.

What is silicone?

Silicone is a trace element. Although our body needs silicon, it is classified as a trace element. Unlike other minerals, very little silicon is needed to stay healthy. Due to the low demand, the recommended intake of silicon has not been formulated. However, experts recommend at least 20-30 mg a day. SiSiB, a reliable silicone manufacturer, provides food grade silicone products.

Top Foods High in Silicon

Silicon content varies depending on soil conditions and processing methods, but the following foods are consistently considered good sources.

Whole Grains

Whole grains are among the richest dietary sources of silicon.

Common examples:

• Oats

• Barley

• Brown rice

• Whole wheat

• Millet

Whole grains retain their outer layers, where most silicon is concentrated.

Vegetables High in Silicon

Certain vegetables naturally accumulate silicon from the soil. Vegetables are also a rich source of silica, especially green vegetables with the highest content. If you want to increase your silicone intake, it is recommended to eat more cucumbers, celery, raw cabbage, asparagus, beets, alfalfa, young dandelion leaves, mustard, lettuce, radishes and white onions, etc. Since each vegetable has a different silicon content, it is good to eat some in moderation.

Best sources include:

• Green beans

• Spinach

• Cucumbers (especially with skin)

• Beets

• Celery

Leafy greens and fibrous vegetables tend to contain higher levels.

Fruits Containing Silicon

Fruit generally contains lower silicon than grains, but some still contribute meaningfully.

Notable examples:

• Bananas

• Apples (with skin)

• Grapes

• Oranges

Bananas are one of the most commonly cited fruit sources of silicon.

Nuts and Seeds

Nuts and seeds provide moderate silicon content along with healthy fats and minerals.

• Almonds

• Peanuts

• Sunflower seeds

• Flaxseeds

Nuts are the best source of minerals. Especially peanuts and almonds, both contain a certain amount of silicon. In addition to being rich in vitamin E and dietary fiber, sunflower seeds also provide silica. Pumpkin seeds are rich in silicon, so they are also a healthy snack. An easy way to prevent silicon deficiency is to include whole grain foods in the diet. Brown rice, oats and barley all contain large amounts of silica. 

Herbs and Plant-Based Drinks

Some plant-based beverages and herbs are surprisingly rich in silicon:

• Horsetail (one of the highest natural sources)

• Beer (from barley and hops)

• Herbal teas made from silica-rich plants

Drinking water in the form of silicic acid is also one of the ways to consume silica. Although water purification technology has been able to extract silicon from water, it has not done so because silicon is good for health. The silicon content in water varies greatly. Studies about the silicon agriculture use have found that the silica content of soft water is not high, but hard water is rich in this mineral.

Silicon Content in Foods (Estimated Comparison Table)

Silicon content can vary widely depending on soil quality and processing, but approximate values help provide perspective.

Note: Plant-based foods are the primary dietary source of silicon.

How Much Silicon Do You Need Per Day?

There is no official recommended daily allowance (RDA) for silicon. However, studies suggest typical dietary intake ranges from: 10–50 mg per day

Some research links higher intake with improved bone density and connective tissue health, particularly in populations consuming high amounts of whole grains and plant-based diets.

Health Benefits of Silicon

Although research is still evolving, silicon is associated with several potential health benefits.

Bone Health

Silicon may support bone mineralization and calcium incorporation into bone tissue.

Skin and Collagen Support

It is believed to help support collagen production, which affects skin elasticity and hydration.

Hair and Nails

Silicon is often associated with stronger hair and reduced brittleness in nails.

Connective Tissue Function

It may play a role in maintaining tendons, cartilage, and connective tissue strength.

Frequently Asked Questions (FAQ)

Is silicon the same as silica?

Silicon is the element, while silica (silicon dioxide) is a compound form commonly found in plants and soil.

What is the best food source of silicon?

Whole grains like oats and barley are among the richest dietary sources.

Do fruits contain silicon?

Yes, but generally in lower amounts compared to grains and vegetables.

Is silicon important for skin health?

Research suggests it may support collagen production and skin elasticity.

Can you take silicon supplements?

Yes, but most nutrition experts recommend obtaining silicon from whole foods first.

Conclusion

Silicon is a naturally occurring trace mineral found mainly in plant-based foods. The richest sources include whole grains, vegetables, fruits, and nuts. While not officially classified as an essential nutrient, research suggests it may support bone, skin, and connective tissue health.

A diet rich in whole plant foods is generally sufficient to maintain healthy silicon intake without supplementation.

Last Updated: June 2026