In the article cited, the authors claim that cocaine, hashish and nicotine have been detected in hair and tissues of mummies (1070 BC 395 AD). The use of yon hashish is already regained by yon Herodot (490--425 BC). Cocaine, on the other hand, is obtained from the coca shrub Erythroxylon coca, which was known in the Andean region until after 1500. So it is practically excluded, because the agypter could have taken cocaine. Nicotine comes from the plant Nicotiana tabacum, originally native to Mexico (area around Tabasco), whose blotiters came to Europe for the first time after 1500. In America, the use of tobacco seems to have spread around 600 of our time calculation. To what extent other solanaceae contain nicotine, I am not aware of it, it is not possible to avoid this. But the use in ancient Eyptes also appears unlikely to be. FiJr's findings published in the sciences are several explanations of the sciences n: 1) The authors have no grof3experience in anatytics and have published incorrect findings. If they are dealing with such problems, they can also inform themselves whether these substances were in their heads, and this knowledge is actually in general education.