All ColumnsMineral Guide
BROMIDE

Bromide ion: Main Effects & Top 5

Published May 5, 2026·1min read

Bromide ion (Br⁻) is found alongside chloride in sea-derived springs. It is absorbed through the skin to calm nervous tension, bringing deep relaxation after bathing.

National maximum
17.6 mg/kg
@
Shijo Kawaramachi Onsen Soraniwa Terrace Kyoto Bettei
Table of Contents
  1. What is Bromide ion?
  2. Main Effects
  3. Bromide ion Top 5 Hot Springs

What is Bromide ion?

Bromide ion (Br⁻) is found alongside chloride in sea-derived springs. It is absorbed through the skin to calm nervous tension, bringing deep relaxation after bathing.

Main Effects

  • Calms nervous tension (transdermal absorption)
  • Deep relaxation after bathing
  • Often coexists with chloride

Bromide ion Top 5 Hot Springs

Top 5 hot springs registered on this site with the highest content.

* Top 5 among onsen analysis records registered in this app

References

Related Articles

Iodine-Containing Springs: Non-Volcanic Rarity with Cholesterol Benefits
SPRING TYPEMay 5, 2026· 1min read

Iodine-Containing Springs: Non-Volcanic Rarity with Cholesterol Benefits

Iodine-containing springs hold iodide ions (I⁻) at 10 mg/kg or more, mainly found in non-volcanic geological strata. Clear at first, they turn yellow when left to stand. Drinking is indicated for dyslipidemia. Note: persons with hyperthyroidism should be cautious.

MINERALMay 5, 2026· 1min read

Iodide ion: Main Effects & Top 5

Iodide ion (I⁻) at ≥ 10 mg/kg classifies the spring as an "iodine spring." Common in non-volcanic springs, it delivers antibacterial and cholesterol-lowering effects.