Silicon Dioxide

Safe Flow AgentNatural

Silicon Dioxide is a naturally derived flow agent used in dietary supplements. Safety rating: Safe. It is widely considered safe at typical supplement doses. Found in 20 supplements in the GoodSupp database. A naturally occurring mineral used as an anti-caking agent.

20 Products use this
Safe Safety rating
Flow Agent Category
Yes Natural origin

Safety Verdict: Safe

This ingredient is rated safe for use in dietary supplements.

What is Silicon Dioxide?

A naturally occurring mineral used as an anti-caking agent.

Common Names Silicon Dioxide, silica,SiO2
Type Flow Agent
Origin Natural / Plant-derived
Safety Rating Safe

Why is Silicon Dioxide used in supplements?

Prevents clumping and ensures consistent dosing.

Role in supplements: Flow agent — prevents powder clumping and ensures uniform filling of capsules.

Should you be concerned about Silicon Dioxide?

No. Silicon Dioxide is widely regarded as safe for use in dietary supplements at typical levels. It has a long history of use and is accepted by major regulatory bodies.

No action needed. This ingredient is safe at amounts used in supplements.

Top-rated products containing Silicon Dioxide

These 20 highest-scoring supplements in our database use Silicon Dioxide.

NOW Chewable Vitamin D-3 25 mcg (1000 IU)
NOW Chewable Vitamin D-3 25 mcg (1000 IU)
Product 100 Brand N/A
Thorne Creatine 5.15 g
Thorne Creatine 5.15 g
Product 100 Brand N/A
Youtheory Men Shilajit 250 mg
Youtheory Men Shilajit 250 mg
Product 100 Brand N/A
ALLMAX Essentials Ashwagandha KSM-66 300 mg
ALLMAX Essentials Ashwagandha KSM-66 300 mg
Product 100 Brand N/A
NOW Taurine, 500 mg, 100 Veg Capsules
NOW Taurine, 500 mg, 100 Veg Capsules
Product 100 Brand N/A
Thorne Zinc Picolinate, 30 mg
Thorne Zinc Picolinate, 30 mg
Product 100 Brand N/A
Thorne Zinc Picolinate, 30 mg
Thorne Zinc Picolinate, 30 mg
Product 100 Brand N/A
Thorne Vitamin B12 Methylcobalamin 1 mg Capsules
Thorne Vitamin B12 Methylcobalamin 1 mg Capsules
Product 100 Brand N/A
Thorne Riboflavin 5' Phosphate, 36.5 mg
Thorne Riboflavin 5' Phosphate, 36.5 mg
Product 100 Brand N/A
Amazing Nutrition Riboflavin, 400 mg
Amazing Nutrition Riboflavin, 400 mg
Product 100 Brand N/A
BlueBonnet Chelated Calcium Magnesium, 120 Caplets
BlueBonnet Chelated Calcium Magnesium, 120 Caplets
Product 100 Brand N/A
BlueBonnet Calcium Citrate & Vitamin D3
BlueBonnet Calcium Citrate & Vitamin D3
Product 100 Brand N/A
Carlson Magnesium Glycinate, 200 mg
Carlson Magnesium Glycinate, 200 mg
Product 100 Brand N/A
Micro Ingredients Magnesium Glycinate 175 mg
Micro Ingredients Magnesium Glycinate 175 mg
Product 100 Brand N/A
NutriCology Zinc Picolinate 25 mg Vegetarian Capsules
NutriCology Zinc Picolinate 25 mg Vegetarian Capsules
Product 100 Brand N/A
Mason Natural Chelated Zinc Gluconate, 100 mg
Mason Natural Chelated Zinc Gluconate, 100 mg
Product 100 Brand N/A
Doctor's Best L-Theanine AlphaWave® 200 mg
Doctor's Best L-Theanine AlphaWave® 200 mg
Product 100 Brand N/A
Force Factor L-Theanine 200 mg
Force Factor L-Theanine 200 mg
Product 100 Brand N/A
Real Mushrooms Lion's Mane, Mushroom Extract Powder
Real Mushrooms Lion's Mane, Mushroom Extract Powder
Product 100 Brand N/A
Force Factor Fundamentals, Cordyceps
Force Factor Fundamentals, Cordyceps
Product 100 Brand N/A
Related Ingredients
Calcium Silicate Safe Colloidal Silicon Dioxide Generally Safe Colloidal Silicon Dioxide and Magnesium Stearate Generally Safe Hydrated Silica Generally Safe Magnesium Silicate Generally Safe Magnesium Stearate (Vegetable Source) and Silica Generally Safe Modified Cellulose Gum and Magnesium Stearate Generally Safe Organic Rice Concentrate Generally Safe
Frequently Asked Questions
Is Silicon Dioxide safe in supplements?

Yes. Silicon Dioxide is rated safe for use in dietary supplements at typical levels. This rating is based on regulatory assessments, published safety research, and its long history of use in the supplement industry. It is widely accepted by major regulatory bodies including the FDA and EFSA. In GoodSupp's database, 20 products contain this ingredient. Consult your healthcare provider if you have specific concerns.

What is Silicon Dioxide and why is it in my supplement?

A naturally occurring mineral used as an anti-caking agent. As a flow agent, it prevents powder ingredients from clumping and ensures uniform filling of capsules during manufacturing. It appears in 20 products in the GoodSupp database.

Is Silicon Dioxide natural or synthetic?

Silicon Dioxide is naturally derived, meaning it comes from natural sources such as plants, minerals, or animal products rather than being chemically synthesized. Natural-origin ingredients are preferred by many consumers, though it's important to note that 'natural' does not automatically mean 'safer' — safety depends on the specific substance, its purity, and the amount used. The safety rating assigned by GoodSupp is based on the ingredient's actual safety profile, not its origin.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.