On Jun 17, 1:41*pm, Tegger wrote:
harry wrote :

Arsenic is a cumulative poison. There is no "safe" level. As with
lead, cadmium and mercury.

Scientifically, that's complete nonsense.

For /all/ substances there is a threshold below which exposure does not
carry physiological or neurological harm. The dose makes the poison,
remember.

--
Tegger

Radiation poisoning is cumulative too. Including X-rays.