Extremely low-frequency magnetic field decreased calcium, zinc and magnesium levels in costa of rat.
Level 5 - mechanism / opinion, no new human data
Animal experimental study without human data.
PubMed 20872091 · doi:10.1007/s12011-010-8855-2
What was done
Rats were exposed to extremely low-frequency magnetic fields (ELF-MF) at 100 μT or 500 μT (public and occupational exposure limits), or sham conditions, for 2 hours daily over 10 months. Rib (costa) bone samples were collected post-exposure, and elemental concentrations of Ca, Mg, Zn, P, Cu, and Fe were quantified using atomic absorption spectrophotometry and ultraviolet spectrophotometry.
What was found
The abstract reports statistical significance without providing numeric baseline or endpoint values: - Ca levels significantly decreased in the 500 μT group compared to the sham group (p < 0.05). - Mg levels significantly decreased in the 500 μT group compared to both the sham and 100 μT groups (p < 0.05). - Zn levels were significantly lower in the 500 μT group compared to both the sham and 100 μT groups (p < 0.05). - No statistically significant differences were observed among groups for P, Cu, or Fe levels.
Why it matters
This study indicates that prolonged exposure to high ELF-MF (500 μT) can alter the trace element and mineral profile of rodent bone tissue, suggesting a potential biochemical pathway for EMF-induced alterations in bone metabolism.
Limits
The abstract does not report the sample size (n), baseline data, exact numerical concentrations, or variance. Findings are derived from a rodent model and limited to a single skeletal site (costa) without biomechanical testing, limiting direct translation to humans.
Cited by
- partial Exposure to electromagnetic frequencies increases the body's depletion of magnesium.