Overview

Cesium is an element. In its natural state, cesium is not radioactive. However, it can be made radioactive in the laboratory. The US Food and Drug Administration (FDA) warns against the use of cesium as medicine due to concerns for severe heart toxicity and death.

Despite serious safety concerns, non-radioactive cesium is used for cancer. This is sometimes called "high pH therapy." According to people who promote high pH therapy, taking cesium chloride by mouth raises the pH of tumor cells. But there is no good scientific evidence to back up these claims or support this use.

Healthcare providers sometimes treat cancer patients with radioactive cesium (cesium-137).

In industry, radioactive cesium is used in instruments that measure thickness, moisture, and liquid flow.

How does it work ?

There isn't enough information to know how cesium might work. Some people who promote "high pH therapy" say cesium affects the pH (acidity) of cancer cells, but there's no scientific research to support this claim.

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