Is it true that strontium is beneficial for bones?

Calcium (Ca), strontium (Sr), and barium (Ba) belong to the same group in the periodic table (alkaline earth metals). They have similar ionic structures and can partially replace each other in biological processes. However, such substitution is not an "equivalent replacement," but rather a forced measure by the organism in the case of a deficiency of the primary element.

Why this happens

Similarity of ions. The ions Ca²⁺, Sr²⁺, and Ba²⁺ have similar radius and charge, which allows them to be incorporated into the mineral matrix of bones and teeth instead of calcium.

Mineral matrix of bones. The hydroxyapatite of bones (Ca₁₀(PO₄)₆(OH)₂) can partially include strontium or barium in the absence of calcium. The organism "does not differentiate" between them at the lattice structure level, but the biochemical properties change.

What are the dangers

Strontium (Sr). In small doses (for example, strontium ranelate in medicine) it can enhance bone mineralization and reduce the risk of fractures. However, with prolonged calcium deficiency and accumulation of Sr instead of Ca, the strength of bones changes: they may become more brittle, and the structure may be compromised.

Barium (Ba). Barium is biologically active but toxic. When deposited in bones or soft tissues, it disrupts the functioning of the nervous system, muscles, and heart (as it interferes with the normal transmission of calcium signals).

Overall impact on the body:

• Bones may become less elastic and more brittle.
• Problems with neuromuscular conductivity may arise (as calcium is a key element in nerve impulse transmission).
• With the accumulation of barium - toxic effects (arrhythmias, muscle spasms, neurological disorders).

Thus, the replacement of calcium with strontium or barium is an "emergency mode" of the organism's functioning, which maintains the structure of bones but deteriorates their quality and overall health condition.