mineralNot FDA-approvedOTC supplementSold in the US as a dietary supplement mineral ingredient (e.g., silica, orthosilicic acid, bamboo extract); not FDA-approved as a drug and not evaluated by FDA for the bone-formation effects studied here
SilicaBenefits, Dosage & Interactions
Also known as: Orthosilicic Acid
Silica, derived from silicon, is a trace mineral present in many tissues and fluids throughout the body. While silicon is the second most abundant element in the Earth's crust, its biological role in humans has been increasingly recognized, particularly in the formation of connective tissues.
How much Silica do people take?
The cited trial used choline-stabilized orthosilicic acid (a bioavailable form of dietary silica) at 6 mg elemental silicon per day, added on top of a calcium/vitamin D3 supplement. Route reported: Oral, liquid supplement. Frequency reported: Once daily. These are amounts documented in the cited studies and labels for Silica — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.
See the full reported protocol and its sourcesResearched by DoseRoutine Research TeamReviewed for accuracy by Nicholas Alexander, RSE, SO, PMPLast updated Educational reference only — not medical advice. Always confirm dosing and safety decisions with a licensed clinician.
Evidence: Strong — 1 human randomized trial published.
Evidence strengthStrong · 4/4
PreclinicalStrong human evidence
1 human randomized trial published.
Whole-body biological half-life
Not applicable
Typical timing
in the morning
Default unit
mg
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
Reported for Silica in the cited sources. Published ranges are not dosing advice.
References & evidence
Documents the Silica entry is written from. Each number matches an inline marker above.
- [1]Choline-stabilized orthosilicic acid supplementation as an adjunct to calcium/vitamin D3 stimulates markers of bone formation in osteopenic females: a randomized, placebo-controlled trialSpector TD, Calomme MR, Anderson SH, Clement G · BMC Musculoskeletal Disorders · 2008 · Peer-reviewed · PMID 18547426
- [2]Silicon Supplementation for Bone Health: An Umbrella Review Attempting to Translate from Animals to HumansPritchard A, Nielsen BD · Nutrients · 2024 · Peer-reviewed · PMID 38337624
References & Evidence
Sources on this page that document Silica dosing, timing and safety.
- [1]National Center for Biotechnology Information View source
Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.
What is Silica studied for?
What is Silica?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.
Silica, derived from silicon, is a trace mineral present in many tissues and fluids throughout the body. While silicon is the second most abundant element in the Earth's crust, its biological role in humans has been increasingly recognized, particularly in the formation of connective tissues. The most bioavailable form for human absorption is generally considered to be orthosilicic acid (OSA).
Dietary sources of silica include whole grains, certain vegetables, fruits, and drinking water. Despite its widespread presence, the exact daily requirement for silicon in humans has not been definitively established, partly due to varying bioavailability from different food sources and individual differences in absorption and metabolism (NIH ODS). Supplements often provide silica in forms designed for enhanced bioavailability, such as stabilized orthosilicic acid. Research continues to explore its importance in maintaining structural integrity and various biological processes.
What does the research say about Silica?
Tap a section to expand.
Silica's proposed mechanisms of action center on its involvement in connective tissue metabolism, particularly collagen synthesis and bone mineralization. Silicon is thought to play a role as a cross-linking agent within glycosaminoglycans and collagen, which are fundamental components of connective tissues like cartilage, bone, skin, and blood vessel walls (Cochrane).
Specifically, in bone formation, silicon appears to be involved in the initial stages of bone mineralization and may influence osteoblast activity, the cells responsible for bone creation (Examine.com). It is posited to act as a nucleating agent for calcium phosphate deposition and may interact with the organic matrix of bone, possibly by forming stable complexes with organic macromolecules. For skin health, silica is thought to contribute to the structural integrity of collagen and elastin, proteins that provide strength and elasticity to the skin. By potentially supporting the optimal synthesis and configuration of these proteins, silica may help maintain skin hydration and reduce the appearance of aging.
Furthermore, silicon may influence the activity of enzymes involved in collagen formation, such as prolyl hydroxylase, which is critical for the stability of collagen fibers. Its interaction with aluminum in the digestive tract has also been studied, with some research suggesting a role in reducing aluminum absorption, although human data are limited (MedlinePlus).
Source for this section: Sources for How does Silica work?: Jumps to this entry in the sources and references list at the end of the page.
Research into silica's potential benefits has largely focused on bone health, skin integrity, and hair and nail strength.
* **Bone Mineral Density:** Some studies suggest that adequate silicon intake may be associated with improved bone mineral density, particularly in certain populations. It is hypothesized to play a role in bone formation and mineralization, potentially by influencing collagen synthesis within the bone matrix and facilitating calcium incorporation (Examine.com). However, the evidence is not uniformly conclusive, and further large-scale human trials are ongoing to solidify these findings.
* **Skin Elasticity and Hydration:** Silica is considered a key component for the optimal structure of collagen and elastin, which are vital for healthy skin. Clinical studies, primarily using stabilized orthosilicic acid, have reported improvements in skin elasticity, moisture retention, and reduced skin roughness in participants taking silica supplements compared to placebo (PubChem). These effects are attributed to silica's potential role in supporting the production and organization of structural proteins in the dermis.
* **Hair and Nail Strength:** Due to its involvement in connective tissue health, silica is often investigated for its potential to improve hair and nail quality. Some research indicates that supplementation may lead to thicker hair, reduced hair fragility, and stronger, less brittle nails. This benefit is thought to stem from silica's contribution to the structural integrity of keratin, the primary protein component of hair and nails, by supporting the collagen matrix necessary for healthy follicle and nail bed function (PubChem).
Evidence for silica's benefits is primarily drawn from observational studies, in vitro research, and a growing number of human clinical trials, particularly with more bioavailable forms like stabilized orthosilicic acid (OSA). For bone health, epidemiological studies have observed correlations between higher dietary silicon intake and increased bone mineral density in hips and spines, suggesting a protective role against osteoporosis. However, randomized controlled trials on silica supplementation specifically targeting bone fracture prevention are limited (Cochrane).
In the realm of dermatological health, several placebo-controlled human trials have shown promising results for skin, hair, and nails. For instance, studies published in peer-reviewed journals have indicated that oral supplementation with OSA improved tensile strength and elasticity of skin, reduced brittleness of nails, and increased hair thickness (PubChem). These studies typically involve female participants over several months. While the findings are encouraging, many studies use specific formulations of silica, and results may not be generalizable to all forms or dosages.
It is important to note that the exact bioavailability of different silica sources varies significantly, which can impact study outcomes. Standardized forms like choline-stabilized orthosilicic acid are often used in research due to their enhanced absorption characteristics. Overall, while the biological plausibility for silica's roles is strong, larger, long-term studies across diverse populations are needed to robustly confirm all purported health benefits and establish optimal intake levels (Examine.com).
Silica is generally considered safe when consumed in amounts typically found in food and often well-tolerated in supplemental forms within recommended dosages. Minor gastrointestinal disturbances, such as mild stomach upset or constipation, have occasionally been reported with higher doses, though these are typically transient and resolve with dosage adjustment or discontinuation. There is no established Upper Tolerable Intake Level for silicon due to a lack of reported adverse effects from high dietary intake (NIH ODS). Long-term safety data for very high supplemental doses are not extensively documented. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Individuals with pre-existing kidney conditions or those prone to kidney stones should exercise caution with silica supplementation, as some theoretical concerns exist regarding its metabolism and excretion, although clear evidence linking silica supplements to kidney stone formation is scarce (MedlinePlus). Pregnant or breastfeeding individuals should consult with a healthcare professional before taking silica supplements due to limited research on safety in these populations. Always adhere to recommended dosages and consult a licensed clinician for personalized advice. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
There are no absolute contraindications for silica supplementation generally recognized, especially when consumed within typical dietary and supplemental ranges. However, individuals with severe kidney disease or those on dialysis should avoid silica supplements unless specifically advised and monitored by their physician, due to potential issues with mineral balance and excretion. As with any supplement, individuals with known allergies or sensitivities to any components of a silica product should avoid its use. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
At present, there are no well-documented significant adverse interactions between silica and specific medications or other supplements. However, silica has been studied for its potential to reduce the absorption of aluminum in the digestive tract. While this might be beneficial in some contexts, it theoretically could affect the absorption of aluminum-containing medications, such as some antacids, if taken concurrently (MedlinePlus). To minimize any potential for altered absorption of other compounds, it is generally prudent to take silica supplements at a different time of day from medications or other supplements, particularly those with known absorption issues. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Silica supplements are commonly studied at dosages ranging from 10 to 20 mg elemental silicon per day. Individual needs vary — talk to a licensed clinician. Some research doses have extended higher than this, but typically for specific therapeutic interventions for defined periods rather than general supplementation. For optimal absorption, silica (orthosilicic acid) can be taken with or without food. Some manufacturers suggest taking it in the morning to align with the body's natural rhythms, though there is no strong scientific evidence to mandate a specific time of day for efficacy. Consistent daily intake is generally more important than precise timing.
Source for this section: Sources for When should you take Silica?: Jumps to this entry in the sources and references list at the end of the page.
Put it into practice
Reading about Silica is the first step — DoseRoutine helps you act on it. These free tools turn what you just learned into a routine.
What interacts with Silica?
No interaction rules currently on file for this compound in DoseRoutine.
Frequently asked questions about Silica
Silica is a mineral. It is also known as Orthosilicic Acid. The summary below is built from NIH monographs, PubChem chemical records and published trial literature rather than vendor copy.
Silica is commonly discussed in the context of supporting bone-joint. Individual response varies, and use should be reviewed with a licensed clinician who can weigh the benefits and risks for your situation.
For Silica, it is typically taken in the morning. Always follow the specific dose your clinician or the product label prescribes.
Silica carries potential side effects and drug interactions, documented in NIH, Mayo Clinic, and FDA label sources. Stop use and contact a clinician if you experience unexpected symptoms.
Interaction risk for Silica comes from the rest of the stack: other minerals, prescription medicines, hormone therapy and peptides. Because Silica is usually taken in the morning, most avoidable conflicts come from what else lands in that same window. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Silica with no sign-up.
There is no single answer for Silica plus TRT. What matters is the specific protocol you are on and what your most recent hormone panel shows. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
Pairing Silica with peptides has to be assessed one peptide at a time, because GLP-1 agonists, secretagogues, healing peptides and melanocortins do not share an interaction profile. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
Published frequency for Silica varies by protocol and formulation, so the label or prescription is what sets it. It is typically taken in the morning. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
The effect of a missed dose of Silica depends on the protocol and formulation you are on. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For Silica the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
The cited trial used choline-stabilized orthosilicic acid (a bioavailable form of dietary silica) at 6 mg elemental silicon per day, added on top of a calcium/vitamin D3 supplement. Route reported: Oral, liquid supplement. Frequency reported: Once daily. These are amounts documented in the cited studies and labels for Silica — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.
Which studies looked at Silica?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.Silica-related diseases in the modern world(opens PubMed in a new tab)Allergy · 2020 · PMID 31989662 · https://pubmed.ncbi.nlm.nih.gov/31989662/
Sources cited on this page
Specific documents referenced by the numbered markers above. Each number matches the marker in the text.
- PubChem CID 24261(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/24261
Verify at
Publisher search links for Silica. These are places to check the information — they are not citations, so they are not numbered.
- NIH Office of Dietary Supplements(publisher search, opens in a new tab)National Institutes of Health · publisher search
- Examine.com(publisher search, opens in a new tab)Examine.com · publisher search
- Cochrane Library(publisher search, opens in a new tab)Cochrane · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- DailyMed labeling archive(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- Wikipedia entry(publisher search, opens in a new tab)Wikipedia · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Silica?
Plain-text summary, safe to quote verbatim:
Silica, derived from silicon, is a trace mineral present in many tissues and fluids throughout the body. While silicon is the second most abundant element in the Earth's crust, its biological role in humans has been increasingly recognized, particularly in the formation of connective tissues.
Source: DoseRoutine — https://doseroutine.com/library/silica
Silica cheat sheet
DoseRoutine cheat sheet · Mineral
Silica
Silica, derived from silicon, is a trace mineral present in many tissues and fluids throughout the body. While silicon is the second most abundant element in the Earth's crust, its biological role in humans has been increasingly recognized, particularly in the formation of connective tissues.
Evidence
Strong
1 human randomized trial published.
Studied range
The cited trial used choline-stabilized orthosilicic acid (a bioavailable form of dietary silica) at 6 mg elemental silicon per day, added on top of a calcium/vitamin D3 supplement
Route
Oral, liquid supplement
Frequency studied
Once daily
Half-life
Not established in the cited trial
Timing
in the morning
Not FDA-approvedOTC supplementSold in the US as a dietary supplement mineral ingredient (e.g., silica, orthosilicic acid, bamboo extract); not FDA-approved as a drug and not evaluated by FDA for the bone-formation effects studied hereBone Joint
Key references
- Choline-stabilized orthosilicic acid supplementation as an adjunct to calcium/vitamin D3 stimulates markers of bone formation in osteopenic females: a randomized, placebo-controlled trial (2008)
- Silicon Supplementation for Bone Health: An Umbrella Review Attempting to Translate from Animals to Humans (2024)
Studied ranges, not dosing advice. Not medical advice — talk to a clinician. doseroutine.com/library/silica
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Silica — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/silica
What compounds are similar to Silica?
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Which goals is Silica used for?
Other compounds studied for the same benefits as Silica.
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