10 Best Silica Supplements (2026) Reviewed
Silica (silicon dioxide) is a trace mineral essential for collagen production, connective tissue health, and maintaining strong hair, skin, and nails. As a key building block in your body’s structural proteins, silica plays a crucial role in everything from bone density to skin elasticity. While silica occurs naturally in foods like whole grains and leafy greens, modern diets often fall short of optimal intake—and our body’s ability to absorb silica declines with age.
Quality matters significantly when choosing a silica supplement. Bioavailability varies dramatically between forms—from poorly absorbed plant extracts to highly bioavailable orthosilicic acid. The source (bamboo, horsetail, red algae, or mineral-based), standardization levels, and delivery format all impact how effectively your body can utilize the silica you’re taking.
For this guide, we researched dozens of silica supplements, cross-referencing Amazon bestsellers with third-party review sites like Healthline and ConsumerLab. We verified product specifications, examined clinical research, and selected 10 products representing different formats, price points, and sourcing methods to help you find the right silica supplement for your needs.
Table of Contents
- Quick Comparison Table
- Best Silica by Form
- Individual Product Reviews
- Buying Guide
- How to Take Silica
- Potential Benefits
- Safety Considerations
- FAQ
- Bottom Line
Quick Comparison Table
| Product | Form | Serving Size | Key Differentiator | Best For | Winner |
|---|---|---|---|---|---|
| Orgono Living Silica | Liquid | 1 tbsp (15ml) | Clinically-studied high absorption | Overall best results | 🏆 TOP PICK |
| BioSil ch-OSA | Capsules | 2 capsules | Patented orthosilicic acid formula | Research-backed results | 🥇 Best Premium |
| NOW Bamboo Silica Beauty | Veg Capsules | 2 capsules | 70% standardized bamboo silica | Bamboo-source seekers | 🥇 Best Bamboo |
| Flora FloraSil | Veg Capsules | 1-3 capsules | Patented water extraction method | Horsetail enthusiasts | 🥇 Best Horsetail |
| NOW Silica Complex | Tablets | 1-3 tablets | Multi-mineral formula with zinc & boron | Comprehensive support | 🥇 Best Value |
| Solgar Oceanic Silica | Veg Capsules | 2 capsules | Marine-derived from red algae | Natural marine source | 🥇 Best Marine |
| Eidon Ionic Silica | Liquid Drops | 30 drops | Angstrom-sized ionic particles | Maximum absorption | 🥇 Best Ionic |
| Cellfood Essential Silica | Liquid | 15 drops 2x daily | Includes trace minerals & enzymes | Multi-mineral support | 🥇 Best Formula |
| Swanson Bamboo Extract | Veg Capsules | 1 capsule | 70% silica at low cost | Budget-conscious buyers | 🥇 Best Budget |
| Nutricost Bamboo Extract | Capsules | 2 capsules | 240 capsules for 120 servings | Long-term value | 🥇 Best Bulk Value |
Best Silica by Form
Liquid Silica
Liquid silica supplements offer potentially superior absorption since they bypass the digestion required for capsules and tablets. They’re ideal for those who have difficulty swallowing pills or want to maximize bioavailability. The trade-off is taste (some have a mineral or slightly metallic flavor) and the need to measure servings. Best picks: Orgono Living Silica for clinical backing, Eidon Ionic Silica for ionic delivery.
Capsules (Bamboo-Derived)
Bamboo extract contains approximately 70% silica by weight—significantly higher than horsetail (around 7%). Bamboo-derived capsules offer convenience and high silica concentration. The silica is bound in a plant matrix, which may affect absorption rates compared to liquid forms. Best picks: NOW Bamboo Silica Beauty for quality, Swanson Bamboo Extract for budget.
Capsules (Horsetail-Derived)
Horsetail (Equisetum arvense) is the traditional source of plant-based silica. While lower in silica content than bamboo, some research suggests horsetail’s bioflavonoids may enhance absorption. Quality varies significantly between products—look for water extraction methods that preserve co-factors. Best pick: Flora FloraSil for patented extraction.
Capsules (Orthosilicic Acid)
Orthosilicic acid (OSA) is the biologically active form of silica that your body can directly utilize. Stabilized forms like ch-OSA (choline-stabilized orthosilicic acid) have the most clinical research supporting efficacy. These are typically more expensive but may deliver better results per milligram. Best pick: BioSil for research-backed ch-OSA.
Marine-Derived Capsules
Silica from red algae offers a unique marine source with naturally occurring calcium and trace minerals. This form may appeal to those seeking whole-food-based supplements. Best pick: Solgar Oceanic Silica.
Individual Product Reviews
Orgono Living Silica Collagen Booster — Best Overall
The most clinically-validated liquid silica with superior bioavailability claims and comprehensive collagen support.
Orgono Living Silica stands out as our top pick thanks to its proprietary formula developed by Dr. Loïc Le Ribault, a researcher who spent decades studying silica bioavailability. The brand claims independent UK clinical trials showed 375% greater absorption compared to other silica forms. Unlike plant-based silica that requires conversion, this mineral-based formula delivers silica in a readily absorbable form designed to activate collagen-producing cells directly.
The liquid format makes it versatile—add it to any beverage, hot or cold. Users consistently report improvements in hair thickness, nail strength, and skin texture within 4-8 weeks of daily use. The formula is vegan-friendly and free from common allergens including gluten, soy, dairy, and artificial ingredients.
Key Specifications:
- Form: Liquid (mineral-based)
- Serving: 1 tablespoon (15ml) daily
- Supply: 33 servings per bottle (16.9 fl oz)
- Certifications: Vegan, Non-GMO, Gluten-Free
Considerations: Higher price point than capsule options; taste may be slightly mineral-like for some users.
BioSil Collagen Booster — Best Research-Backed
The gold standard for clinically-proven collagen generation using patented ch-OSA technology.
BioSil’s ch-OSA (choline-stabilized orthosilicic acid) is the most extensively researched silica complex available. Multiple double-blind, placebo-controlled studies published in peer-reviewed journals have demonstrated its ability to reduce fine lines and wrinkles, improve skin elasticity, and strengthen hair and nails. The choline component serves dual purposes: it stabilizes the orthosilicic acid for optimal absorption and helps neutralize homocysteine, which can degrade collagen.
What sets BioSil apart is that it doesn’t just deliver silica—it activates your body’s collagen-producing cells. The formula has been approved by the European Food Safety Authority and Health Canada after rigorous safety and efficacy evaluation. For those prioritizing science-backed results over cost savings, BioSil represents the premium choice.
Key Specifications:
- Form: Vegetarian capsules
- Active: 5mg silicon (as ch-OSA) + 100mg choline per capsule
- Serving: 2 capsules daily
- Supply: 60 servings per bottle (120 capsules)
- Certifications: Vegan, Non-GMO, Gluten-Free
Considerations: Premium pricing; results may take 3-6 months to fully manifest.
NOW Foods Bamboo Silica Beauty — Best Bamboo-Based
High-potency bamboo extract standardized to 70% silica from a trusted supplement brand.
NOW Foods delivers a straightforward, high-quality bamboo silica supplement at a reasonable price. Each two-capsule serving provides 760mg of bamboo extract (Bambusa vulgaris) standardized to contain at least 70% silica—delivering over 500mg of actual silica per serving. Bamboo is nature’s richest source of plant silica, and NOW’s standardization ensures consistent potency batch to batch.
The formula reflects NOW’s commitment to clean ingredients: just bamboo extract in a cellulose capsule with minimal fillers. It’s manufactured in NOW’s GMP-certified facilities with in-house testing for identity, potency, and purity. For those who prefer plant-based silica sources and trust established supplement brands, this is an excellent choice.
Key Specifications:
- Form: Vegetarian capsules
- Active: 760mg bamboo extract (min. 70% silica) per serving
- Serving: 2 capsules daily
- Supply: 45 servings per bottle (90 capsules)
- Certifications: Vegan, Non-GMO, GMP Quality Assured
Considerations: Capsules are moderately sized; plant-based silica may have lower bioavailability than liquid forms.
Flora FloraSil — Best Horsetail-Based
Premium vegetal silica using a patented water extraction process for enhanced bioavailability.
Flora’s FloraSil uses a patented extraction method developed by Dr. Louis Kervran at the University of Paris. Unlike chemical extraction, this water-based process preserves the bioflavonoids that research suggests are necessary for effective silica absorption. The result is orthosilicic acid—the same bioavailable form your body naturally utilizes—derived from spring horsetail plants.
The gentle extraction also retains complementary minerals including calcium, potassium, magnesium, manganese, boron, iron, and phosphorus. Users appreciate that FloraSil comes in glass bottles, reflecting Flora’s commitment to product integrity. The brand has been producing this formula for decades with consistent positive feedback for hair, skin, and nail improvements.
Key Specifications:
- Form: Vegetarian capsules
- Active: 9mg silica (from horsetail extract) per capsule
- Serving: 1-3 capsules daily with meals
- Supply: 30-90 servings per bottle (90 capsules)
- Certifications: Vegan, Non-GMO, Gluten-Free
Considerations: Lower silica per capsule than bamboo sources; glass bottle requires careful handling during shipping.
NOW Foods Silica Complex — Best Value
A comprehensive multi-mineral silica formula delivering excellent value per serving.
NOW Silica Complex goes beyond standalone silica by combining horsetail extract with zinc, calcium, manganese, and boron—minerals that work synergistically to support connective tissue, bone health, and beauty from within. The formula provides 40mg of silica from horsetail along with supporting nutrients that may enhance its effectiveness.
With 180 tablets per bottle and a flexible dosing range (1-3 tablets daily), this represents exceptional value. NOW’s A-rated GMP certification and ISO-accredited in-house laboratories ensure consistent quality. For those seeking comprehensive mineral support rather than silica alone, this multi-nutrient approach offers the best bang for your buck.
Key Specifications:
- Form: Vegetarian tablets
- Active: 40mg silica + 50mg calcium + 8mg zinc + 1mg boron per tablet
- Serving: 1-3 tablets daily with food
- Supply: 60-180 servings per bottle (180 tablets)
- Certifications: Vegan, Non-GMO, Gluten-Free, GMP Quality Assured
Considerations: Contains horsetail, which some individuals may need to avoid; tablet form may be less convenient than capsules for some users.
Solgar Oceanic Silica — Best Marine-Based
Unique marine-derived silica from red algae with naturally occurring calcium.
Solgar’s Oceanic Silica offers a distinctive approach: sourcing silica from marine-derived red algae powder (Lithothamnion corallioides). This oceanic source provides silica in a natural mineral matrix along with calcium and other trace elements found in the algae. For those who prefer whole-food-derived supplements over isolated compounds, this marine origin offers an appealing alternative.
Solgar has maintained its reputation for quality since 1947, and this product reflects their “Gold Standard” commitment. The vegetable capsules are free from gluten, wheat, dairy, soy, and artificial ingredients. Users report positive effects on bone health and nail strength, with the added benefit of calcium intake.
Key Specifications:
- Form: Vegetarian capsules
- Active: 25mg silica + 200mg calcium (from red algae) per 2 capsules
- Serving: 2 capsules daily with meals
- Supply: 50 servings per bottle (100 capsules)
- Certifications: Vegan, Non-GMO, Gluten-Free, Kosher
Considerations: Lower silica content than bamboo-based options; best suited for those who prioritize natural marine sources.
Eidon Ionic Silica — Best Ionic Liquid
Ultra-small ionic silica particles designed for maximum cellular absorption.
Eidon takes a unique approach by creating angstrom-sized ionic silica particles suspended in ultra-pure deionized water. These electrically charged particles are designed to be absorbed directly at the cellular level without requiring digestion or conversion. The company uses proprietary technology to mimic natural mineral processes, creating what they describe as 100% bioavailable silica.
The liquid format allows versatile use—add drops to water, juice, or apply topically to skin. Eidon has been producing ionic minerals since 1996 and maintains strict quality control in their California facility. The formula contains only silica and purified water with no sugars, flavors, colors, or preservatives.
Key Specifications:
- Form: Liquid ionic concentrate
- Serving: 30 drops daily in any liquid
- Supply: Approximately 48 servings per bottle (2 oz)
- Certifications: Vegan, Gluten-Free, No Additives
Considerations: Smaller bottle requires more frequent reordering; concentration means precise measuring is important.
Cellfood Essential Silica — Best Multi-Mineral Formula
Comprehensive silica formula enhanced with trace minerals and the proprietary Cellfood delivery system.
Cellfood Essential Silica combines highly purified silica with the additional trace minerals your body needs to optimize its effectiveness—including boron, magnesium, manganese, potassium, iron, and phosphorus. The formula incorporates Cellfood’s proprietary blend of enzymes, amino acids, and electrolytes designed to enhance absorption at the cellular level.
The silica undergoes a unique proprietary process that creates pH-neutral, ionic molecules measuring less than 10 nanometers. This nano-sized particle technology, combined with the Cellfood delivery system, is designed to provide exceptional absorption. NuScience Corporation has manufactured Cellfood products for over 50 years in FDA-compliant, GMP-certified facilities.
Key Specifications:
- Form: Liquid formula
- Active: Silica + trace minerals + Cellfood proprietary blend
- Serving: 15 drops twice daily in water or juice
- Supply: 40 servings per bottle (4 fl oz)
- Certifications: Gluten-Free, Non-GMO
Considerations: More complex formula may not suit those wanting pure silica; higher price point for the bottle size.
Swanson Bamboo Extract — Best Budget
Affordable bamboo silica from a trusted brand delivering 70% standardized silica.
Swanson delivers excellent value with their Bamboo Extract, offering 300mg of 70% standardized bamboo silica per capsule at a fraction of premium brand prices. For nearly 50 years, Swanson has built a reputation for providing quality supplements at accessible prices, and this product exemplifies that mission.
The formula is simple and effective: bamboo shoot extract in a vegetable capsule with minimal additives. It’s manufactured in GMP-certified facilities with third-party testing for purity and potency. Users consistently report positive results for hair and nail growth comparable to more expensive options. For budget-conscious consumers who want proven bamboo silica without premium pricing, Swanson delivers.
Key Specifications:
- Form: Vegetarian capsules
- Active: 300mg bamboo extract (70% silica) per capsule
- Serving: 1 capsule daily
- Supply: 60 servings per bottle (60 capsules)
- Certifications: Vegan, Non-GMO, Gluten-Free, GMP Certified
Considerations: Single capsule serving provides less silica than some competitors; basic formula without additional synergistic nutrients.
Nutricost Bamboo Extract — Best Bulk Value
Maximum value with 240 capsules providing 4+ months of daily silica supplementation.
Nutricost’s Bamboo Extract offers the best long-term value for committed silica supplementation. With 240 capsules per bottle (120 two-capsule servings), you’re getting four months of supply at an exceptional per-serving cost. The formula provides 800mg of bamboo shoot extract standardized to 70% silica per serving.
Nutricost manufactures in NSF-certified, GMP-compliant facilities with third-party testing for quality assurance. The formula is clean: bamboo extract in a cellulose capsule with minimal additives. For those who’ve found silica beneficial and want to stock up without breaking the bank, Nutricost provides unbeatable value.
Key Specifications:
- Form: Vegan capsules
- Active: 800mg bamboo extract (70% silica) per 2 capsules
- Serving: 2 capsules daily
- Supply: 120 servings per bottle (240 capsules)
- Certifications: Vegan, Non-GMO, Gluten-Free, NSF Certified Facility
Considerations: Large bottle may exceed shelf life for infrequent users; some users report variation in capsule fill levels.
Buying Guide: What to Look for in a Silica Supplement
Bioavailability Form
The form of silica significantly impacts absorption. Orthosilicic acid (especially stabilized forms like ch-OSA) has the most research supporting bioavailability. Liquid ionic silica may absorb quickly. Plant-based silica from bamboo or horsetail requires conversion in the body but offers natural sourcing. Choose based on your priorities: research backing, absorption speed, or natural origin.
Standardization
For bamboo products, look for 70% silica standardization—this ensures consistent potency. Horsetail products should specify silica content per serving. Avoid products that don’t disclose silica amounts, as actual content can vary widely.
Third-Party Testing
Quality silica supplements should be manufactured in GMP-certified facilities with third-party testing for purity and potency. Look for brands that disclose their testing protocols and certifications.
Complementary Nutrients
Some formulas include synergistic nutrients like vitamin C, zinc, biotin, or other minerals that may enhance silica’s effects on collagen production and connective tissue health. Consider whether you prefer a pure silica product or a comprehensive formula.
Red Flags to Avoid
- Products that don’t specify silica content or standardization
- Excessive fillers and additives
- No third-party testing or quality certifications
- Unrealistic claims about reversing hair loss or curing conditions
- Extremely low prices that suggest quality compromises
How to Take Silica Supplements
Recommended Dosage
Most research on silica supplementation uses 5-10mg of elemental silicon daily, though many supplements provide higher amounts from plant extracts. Follow the manufacturer’s dosing instructions, as formulations vary significantly in concentration and bioavailability.
Best Time to Take
Silica is generally well-tolerated and can be taken with or without food. However, some products recommend taking with meals to reduce the chance of digestive discomfort. Liquid silica can be added to water, juice, or other beverages. Consistency matters more than timing—choose a time that helps you remember to take it daily.
Form-Specific Instructions
- Liquid silica: Measure carefully using the provided dropper or tablespoon. Add to any beverage and drink immediately.
- Capsules/tablets: Take with a full glass of water. Some products recommend splitting doses between morning and evening.
- Ionic drops: Add specified drops to purified water or juice. Some users also apply topically.
Duration and Cycling
Results from silica supplementation typically become noticeable after 4-12 weeks of consistent use, with optimal benefits often reported around 3-6 months. Some practitioners recommend cycling (taking breaks every few months), though continuous use is also common. Consult your healthcare provider for personalized guidance.
Potential Benefits of Silica Supplementation
Hair Health
Research suggests silica may support hair strand strength and thickness by delivering nutrients to hair follicles. A 2007 study found women taking silicon supplements for 9 months showed improved hair strand strength. Silica’s role in collagen production may help maintain the scalp’s connective tissue that supports hair follicles.
Skin Support
Silica is essential for collagen synthesis, and collagen provides skin structure and elasticity. A double-blind study published in the Archives of Dermatological Research found women taking ch-OSA for 20 weeks showed reduced skin roughness and improved elasticity. Silica may help maintain skin hydration and reduce the appearance of fine lines.
Nail Strength
Silica helps deliver orthosilicic acid—a compound that supports nail keratin formation. Users frequently report reduced nail brittleness and improved growth when supplementing with silica.
Bone and Joint Support
Silicon plays a role in bone mineralization and collagen formation in cartilage. Research suggests adequate silicon intake may support bone density, particularly in premenopausal women. Silica may also support the connective tissues in joints.
Collagen Production
As a key cofactor in collagen synthesis, silica helps activate the enzymes that produce collagen, keratin, and elastin. This foundational role makes silica relevant for any tissue where these proteins provide structure.
Safety Considerations
Potential Side Effects
Silica supplements are generally well-tolerated. Some users report mild digestive effects when starting supplementation. Start with a lower dose and increase gradually if you experience any discomfort.
Who Should Avoid Silica Supplements
- Individuals with kidney disease or impaired kidney function (silica is excreted through kidneys)
- Those with liver conditions should consult their healthcare provider before using horsetail-based products
- Pregnant or breastfeeding women should consult their healthcare provider
- Anyone taking diuretic medications (may increase silica excretion)
Drug Interactions
Silica may interact with certain medications. Horsetail-based silica products may have diuretic effects and should be used cautiously with diuretic medications. Consult your healthcare provider if you take prescription medications, particularly for heart, kidney, or liver conditions.
Quality Concerns with Horsetail
Some horsetail products may contain thiaminase, an enzyme that breaks down vitamin B1. Quality manufacturers use processing methods that eliminate thiaminase. Look for products labeled “thiaminase-free” if using horsetail-based silica long-term.
When to Consult a Healthcare Provider
Consult your doctor before starting silica supplementation if you have any chronic health conditions, take prescription medications, are pregnant or nursing, or plan to use silica supplements long-term.
Frequently Asked Questions
What is the difference between silica and silicon?
Silicon is the element (Si on the periodic table), while silica is silicon dioxide (SiO2)—silicon combined with oxygen. In supplements, “silica” typically refers to various silicon-containing compounds. Your body utilizes silicon, which it obtains from silica-containing sources.
Which form of silica is best absorbed?
Orthosilicic acid, particularly when stabilized (like ch-OSA), has the strongest research supporting bioavailability. Liquid ionic forms may also absorb well. Plant-based silica from bamboo or horsetail requires conversion to orthosilicic acid in the body, which may reduce effective absorption.
How long until I see results from silica supplements?
Most users report initial improvements in nail strength within 4-6 weeks. Hair and skin changes typically become noticeable around 8-12 weeks. Optimal results often require 3-6 months of consistent supplementation due to natural growth and renewal cycles.
Can I take silica with collagen supplements?
Yes, silica and collagen supplements can be taken together and may complement each other. Silica helps your body produce its own collagen, while collagen supplements provide amino acids. They work through different mechanisms.
Is bamboo silica better than horsetail silica?
Bamboo contains approximately 70% silica by weight compared to horsetail’s roughly 7%, making it more concentrated. However, some research suggests horsetail’s bioflavonoids may enhance silica absorption. Both can be effective—quality and bioavailability matter more than the source.
Can silica supplements regrow hair?
Silica may support hair strength and reduce breakage, but there’s no scientific evidence it can reverse pattern baldness or regrow hair in areas that have stopped producing hair. It’s best used to support overall hair health rather than as a hair loss treatment.
Are there foods high in silica?
Yes, silica occurs naturally in whole grains (oats, barley, wheat), leafy greens, bananas, green beans, and beer. However, modern food processing and soil depletion have reduced silica content in many foods, which is why supplementation has become popular.
Is silica safe for long-term use?
For healthy adults, silica supplements appear safe for long-term use at recommended doses. However, long-term studies are limited. Some practitioners recommend periodic breaks. Consult your healthcare provider for personalized guidance on duration.
Can I take too much silica?
While silica has a good safety profile, excessive intake could theoretically stress the kidneys since silica is excreted through urine. Stick to recommended doses and avoid stacking multiple silica-containing supplements.
Why is my silica supplement causing digestive issues?
Some individuals experience mild digestive effects when starting silica, especially with higher doses. Try taking with food, reducing the dose initially, or switching forms (some tolerate liquid better than tablets, or vice versa).
Bottom Line
For most people: Orgono Living Silica offers the best combination of bioavailability, clinical backing, and user-reported results in a versatile liquid format.
For research-backed results: BioSil ch-OSA provides the most clinically-studied form of silica with extensive evidence supporting its effectiveness for skin, hair, and nails.
For budget-conscious buyers: Swanson Bamboo Extract delivers quality 70% standardized bamboo silica at an accessible price point.
For maximum value: Nutricost Bamboo Extract offers four months of supply in one bottle at an unbeatable cost per serving.
For comprehensive mineral support: NOW Silica Complex combines silica with zinc, calcium, and boron for synergistic benefits.
