Strontium Mineral Database

Quick summary

Strontium is a naturally occurring element that is chemically similar to calcium. However, it is not established as an essential mineral nutrient for humans. Research has explored its role primarily in bone health when used in supplement forms, but current evidence remains limited and inconclusive.

What is it?

Strontium is a chemical element found naturally in the environment, including soil, rocks, and water. It shares some chemical properties with calcium, which allows it to be incorporated into bones. Despite this, strontium is not recognized as an essential nutrient for human health, meaning no biological functions require its presence to sustain life or normal physiological function.

Main functions in the body

There is no established biological function for strontium in the human body. Unlike essential minerals such as calcium, magnesium, or zinc, strontium does not have recognized roles in enzymatic reactions, cellular processes, or structural functions that are necessary for maintaining health.

Recommended intake and upper limit

Currently, there are no established Recommended Dietary Allowance (RDA) or Adequate Intake (AI) values for strontium, as it is not classified as essential. Similarly, no official upper intake levels (UL) have been set due to insufficient data regarding its safety and toxicity profile. Intake levels vary naturally depending on diet and environmental exposure.

Best food sources

There is no specific nutritional data defining foods as sources of strontium because it is not considered an essential nutrient. Trace amounts are commonly found in many types of food and drinking water, but typical diet does not aim to supply strontium for health purposes.

Deficiency: causes, symptoms and risk groups

There is no evidence of strontium deficiency in humans, and no conditions have been linked to insufficient strontium intake. Because it is not recognized as essential, deficiency states are not identified or clinically relevant.

Supplement forms

Various strontium compounds have been used in supplements, often in the context of bone health research. These include strontium ranelate (used mainly in Europe for osteoporosis treatment). However, data on absorption differences between supplement forms or their comparative efficacy remain limited. Due to regulatory restrictions and safety concerns, strontium ranelate supplements are not widely authorized or available in many countries.

Absorption and bioavailability

Detailed scientific data on the absorption, metabolism, and bioavailability of strontium in humans are lacking. It is known that strontium can be absorbed through the gastrointestinal tract to some extent, as it shares similarities with calcium, but precise factors influencing its uptake are not well characterized. There is no clear evidence on dietary enhancers or inhibitors of strontium absorption, nor definitive information on form differences.

Potential benefits: what does the evidence say?

• Bone health: Some clinical trials have investigated strontium compounds, particularly strontium ranelate, for effects on bone mineral density and osteoporosis treatment. Results indicate limited and mixed evidence. While some studies report modest benefits in reducing fracture risk or improving bone markers, these findings are not conclusive and involve specific pharmaceutical forms rather than general dietary intake or supplements. Strontium is not established as essential for normal bone health.

Overall, evidence supporting routine strontium supplementation for bone health in the general population or in people without diagnosed osteoporosis is insufficient.

Side effects and toxicity

There is a lack of comprehensive safety data and an official toxicity profile for strontium. No common side effects have been well-documented for typical dietary exposure. However, because no upper intake limits have been set, caution is advised with supplementation, especially at high doses.

Pharmaceutical forms such as strontium ranelate have been associated with rare but serious adverse effects (e.g., cardiovascular events), leading to regulatory restrictions in some countries. These risks highlight the importance of medical supervision before considering strontium-containing treatments.

Drug and nutrient interactions

Currently, no well-documented interactions between strontium and medications or other nutrients are established in the general population. Due to its chemical similarity to calcium, strontium could theoretically interfere with calcium metabolism, but clinical evidence is lacking.

Who should be careful?

People who are pregnant, breastfeeding, have medical conditions (including kidney or thyroid disease), iron overload disorders, or who use medications should consult a healthcare professional before using any strontium-containing supplements.

Given the uncertainties around safety, especially with pharmaceutical strontium compounds, patients with cardiovascular disease or risk factors should exercise particular caution and seek medical advice before treatment.

Frequently asked questions

• Is strontium an essential mineral? No, strontium is not recognized as an essential nutrient for humans.
• Can strontium supplements improve bone health? Some limited research has explored this, but evidence is mixed and inconclusive; strontium supplementation is not routinely recommended for bone health.
• Are there foods rich in strontium? Strontium occurs in small amounts in many foods but is not targeted nutritionally.
• Is it safe to take strontium supplements? Safety data are incomplete and upper intake levels are not established, so supplementation should be approached with caution, ideally under medical guidance.
• Does strontium interact with calcium? It shares similarities with calcium, but clinically relevant interaction data are limited.

Evidence limitations

• Lack of official dietary intake recommendations for strontium.
• No established essential nutrient status.
• Human evidence for supplementation benefits is insufficient.
• Incomplete safety and toxicity data.

References

Disclaimer: This page provides evidence-based information about strontium but does not offer medical advice or treatment recommendations. Individuals interested in strontium supplementation or with health concerns should consult a healthcare professional. This is especially important for pregnant or breastfeeding women, those with existing medical conditions, or those taking medications.

Last reviewed: June 2024