on June 24, 2026
When it comes to osteoporosis, thoughts often immediately turn to calcium. For years, the dominant message has been simple: the more calcium we consume, the stronger our bones will be.
In recent years, however, research has revealed a more complex reality.
Bone health depends on a balance between bone remodeling, inflammatory status, physical activity, adequate protein intake, the availability of micronutrients, and a proper metabolic balance. Calcium remains important, but on its own, it is not a sufficient solution.
Bone is a biologically active tissue that is constantly renewed and requires a favorable metabolic environment to maintain its strength and quality over time.
Bone is alive: the continuous balance between formation and resorption
Bone tissue is constantly remodeled.
Osteoblasts build new matrix.
Osteoclasts remove older tissue, allowing for physiological renewal.
When this balance is disrupted and resorption exceeds formation, skeletal strength may gradually decrease, increasing the risk of fractures.
For this reason, bone mineral density is only one part of the assessment: matrix quality, metabolism, and systemic conditions also play a decisive role.
Calcium: essential, but not sufficient
Calcium is one of the fundamental components of bone, but today we know that supplementation alone does not automatically guarantee a reduced risk of fracture.
One of the largest clinical studies conducted on postmenopausal women found that calcium supplementation combined with vitamin D had modest effects on bone density and led to an increase in kidney stone cases in some patient groups.
This does not mean that calcium is harmful or useless.
It means that its use must be contextualized and personalized.
Before increasing intake, it is useful to assess overall diet, individual requirements, kidney function, and vitamin D status.
Vitamin D: more than a vitamin
Vitamin D is one of the central regulators of bone metabolism.
Biologically, it functions like a true hormonal system.
It is synthesized in the skin through sun exposure and subsequently activated by the liver and kidneys.
Among its main functions:
promoting intestinal calcium absorption
regulating parathyroid hormone
supporting bone remodeling
contributing to muscle function
A significant deficiency causes rickets in children and osteomalacia in adults.
In clinical practice, vitamin D deficiency is frequently observed, especially in older adults, individuals with limited sun exposure, and people at increased metabolic risk.
Guidelines suggest that any supplementation should be tailored to individual needs and blood levels.
Silicon and bone matrix: a micronutrient of biological interest
Silicon is among the micronutrients studied for supporting connective and bone tissue.
This mineral participates in the organization of the extracellular matrix and has been experimentally associated with collagen metabolism and mineralization.
Interest in plants naturally rich in silicon, such as Equisetum arvense, stems from this biological rationale.
To date, clinical evidence remains more limited than for vitamin D and physical activity, but the topic continues to be a subject of research.
Oxidative stress and bone health
Oxidative stress appears to contribute to the progressive loss of bone quality.
For this reason, several studies are exploring the role of substances with antioxidant activity.
These include:
fruit polyphenols
bioactive plant compounds
alpha-lipoic acid
Alpha-lipoic acid is studied for its ability to interact with cellular antioxidant systems and support energy metabolism.
Some preliminary data suggest potential benefits in protecting bone metabolism and reducing oxidative stress, especially in altered metabolic contexts.
However, further clinical studies are needed to establish clear practical indications.
Phytocompounds and bone metabolism: what the research suggests
An emerging area of research concerns the effects of standardized plant extracts.
A 28-day randomized clinical study in healthy postmenopausal women observed changes in gene expression associated with bone formation and resorption processes after using combinations of pomegranate polyphenols, grape seed, quercetin, and licorice.
The results suggest a possible modulation of pathways involved in osteoblastic and osteoclastic activity.
However, these are preliminary results and do not demonstrate clinical efficacy in preventing fractures.
Movement: the true foundation of treatment
If there is one strategy universally supported by evidence for bone health, it is movement.
Regular physical activity:
stimulates bone remodeling
improves muscle function
reduces the risk of falls
supports energy metabolism
Walking, moderate resistance exercises, aerobic activity, and adapted training are practical tools for maintaining skeletal quality over time.
No supplement or medication can fully replace the role of movement and a balanced diet.
A modern view of osteoporosis
Osteoporosis should not be interpreted simply as a calcium deficiency.
It is a multifactorial condition in which diet, sun exposure, metabolic status, physical activity, inflammation, and bone matrix quality continuously interact.
The goal is not to pursue a single nutrient.
The goal is to create a biological environment conducive to maintaining bone function over time.
Bibliography
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Bischoff-Ferrari HA et al. Vitamin D supplementation and musculoskeletal health outcomes. BMJ. 2016.
Jugdaohsingh R. Silicon and bone health. J Nutr Health Aging. 2007.
Lin Y, Kazlova V, Ramakrishnan S et al. Bone health nutraceuticals alter microarray mRNA gene expression. Phytomedicine. 2016;23(1):18–26.
Shay KP et al. Alpha-lipoic acid as a dietary supplement. Biochim Biophys Acta. 2009.
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Dietz BM, Hajirahimkhan A, Dunlap TL, Bolton JL. Botanicals and Their Bioactive Phytochemicals for Women’s Health. Pharmacol Rev. 2016.
