It is also generally unethical (and often illegal) to conduct randomized experiments on the effects of substandard or harmful treatments, such as the effects of ingesting arsenic on human health.
Dǎɣ ashrut, eqal sajət ebaɗi ən taɣlək (war itətwəj agud) ye umaɣ ən iruman ajətnen fal ijitan ən issafaran ahuskatnen əndaratnen meɣ əkmanen, atamosan ijitan ən ashugəsh ən arseniə fal asseɣat nadinat.