Why Silicon Matters After 50
Silicon for seniors is a topic that rarely appears on mainstream supplement lists, yet this trace element plays a meaningful structural role throughout the body. Silicon (as orthosilicic acid and its derivatives) is found in connective tissue, bone matrix, hair, and skin. As we age, dietary intake often falls and tissue concentrations gradually decline, making adults over 50 a group that may benefit from paying closer attention to this mineral.
Silicon is not the same as silicone (the synthetic polymer). Biologically relevant silicon appears primarily as orthosilicic acid (OSA) in foods such as oats, barley, and mineral water, and in supplemental forms including choline-stabilised orthosilicic acid (ch-OSA).
How Absorption Changes With Age
In younger adults, silicon is reasonably well absorbed from dietary sources, particularly cereal grains and certain mineral waters. After 50, several factors reduce effective intake:
- Reduced gastric acid secretion limits conversion of dietary silicon to absorbable orthosilicic acid.
- Fibre-rich diets, while beneficial overall, can partially bind silicon.
- Kidney filtration efficiency decreases, altering the balance of excretion and retention.
A clinical trial by Spector et al. (2008) evaluated ch-OSA supplementation in women and found it well tolerated and bioavailable, supporting the case for a supplemental form designed to survive gastrointestinal processing.
Bone Health: What the Evidence Shows
Silicon is associated with collagen synthesis and bone mineralisation. Observational data suggest that higher dietary silicon intake is associated with greater bone mineral density at the hip in men and premenopausal women (Jugdaohsingh et al., 2004). After menopause, when oestrogen-driven bone loss accelerates, dietary silicon intake shows a weaker protective association — this does not mean silicon becomes irrelevant, but it underlines that it works best as part of a broader bone-health strategy that includes calcium, vitamin D, and weight-bearing exercise.
For practical bone support, many people over 50 combine silicon sources with established products. OstroVit Vitamin D3 + K2 90 tabs and OstroVit Collagen + Vitamin C 400g are available at maxfit.ee and complement silicon's role in the bone-collagen matrix.
Connective Tissue, Hair, and Skin
Silicon is concentrated in tendons, ligaments, and cartilage. Supplemental ch-OSA has been studied for its effect on skin and hair in double-blind trials. Barel et al. (2005) found that women taking ch-OSA for 20 weeks showed improved skin surface and elasticity compared to placebo, alongside improved hair tensile strength. These are modest but real benefits, relevant for adults noticing the gradual connective-tissue changes that accompany ageing.
For those interested in complementary support, OstroVit Collagen + Vitamin C 400g Ananass provides hydrolysed collagen peptides alongside ascorbic acid, which is necessary for endogenous collagen synthesis.
Dose and Safety
There is no established EU or US recommended dietary allowance (RDA) for silicon. Typical supplemental doses of ch-OSA in clinical trials range from 6 to 10 mg of elemental silicon per day. Dietary intake from food for adults in Western Europe averages roughly 20–50 mg per day, with higher intakes in populations eating more wholegrains and drinking silicon-rich mineral water.
Silicon is considered low-risk at supplemental doses. There is no documented toxic threshold from oral organic silicon sources in healthy adults. The main safety caveat involves kidney disease: impaired kidney function reduces silicon clearance, so individuals with chronic kidney disease should consult their doctor before supplementing.
Interactions With Medication
Silicon has no well-documented clinically significant drug interactions at supplemental doses. However:
- Antacids and proton pump inhibitors (PPIs), commonly used by older adults, reduce gastric acid and may lower absorption of food-form silicon; choosing a bioavailable supplement form such as ch-OSA is more relevant than avoiding medication.
- Silicon should not be conflated with aluminium silicate or other silicate compounds; industrial silicon compounds carry different toxicity profiles entirely unrelated to dietary silicon.
If you take multiple medications for bone health or kidney conditions, mention any new supplement to your pharmacist.
When to Consider Supplementing
Silicon supplementation may be worth considering for adults over 50 who:
- Follow a low-wholegrains diet and consume little mineral water high in silicon.
- Are concerned about skin elasticity, hair quality, or connective tissue resilience.
- Want a complementary, evidence-informed addition to an existing bone-health regimen.
It is not a standalone treatment for osteoporosis or any disease. Used sensibly alongside a varied diet and established supplements such as vitamin D and calcium, silicon represents a low-risk, potentially supportive addition.
You can browse available bone and connective tissue supplements at maxfit.ee/en/category/luud-kohred-sidemed-liigesed.
References
- Jugdaohsingh, R., Anderson, S. H., Tucker, K. L., Elliott, H., Kiel, D. P., Thompson, R. P., & Powell, J. J. (2004). Dietary silicon intake and absorption. American Journal of Clinical Nutrition, 75(5), 887–893.
- Barel, A., Calomme, M., Timchenko, A., De Paepe, K., Paepe, K., Rogiers, V., & Vanden Berghe, D. (2005). Effect of oral intake of choline-stabilized orthosilicic acid on skin, nails and hair in women with photodamaged skin. Archives of Dermatological Research, 297(4), 147–153. https://pubmed.ncbi.nlm.nih.gov/16205932/
- Spector, T. D., Calomme, M. R., Anderson, S. H., Clement, G., Bevan, L., Demeester, N., & Powell, J. J. (2008). Choline-stabilized orthosilicic acid supplementation as an adjunct to calcium/vitamin D3 stimulates markers of bone formation in osteopenic females. BMC Musculoskeletal Disorders, 9, 85. https://pubmed.ncbi.nlm.nih.gov/18547426/
FAQ
Is silicon the same as silica or silicon dioxide?
No. Dietary silicon refers to bioavailable forms such as orthosilicic acid found in foods and supplements. Silicon dioxide (silica) appears as a food additive and flowing agent, while crystalline silica is an industrial hazard. None of these are equivalent to supplemental orthosilicic acid.
Can I get enough silicon from food alone after 50?
Possibly, if your diet is rich in oats, barley, mineral water, and green beans. However, reduced gastric acid production in older adults can lower conversion efficiency from food, making a bioavailable supplemental form a reasonable consideration.
Does silicon interact with osteoporosis medication?
No significant pharmacological interactions with bisphosphonates or other bone-density medications have been reported. Still, inform your prescribing doctor about all supplements you take.
