Sulis to various Indo-European words for "sun" (cf. Homeric Greek ηέλιος, Sanskrit "sūryah" "sun", from Proto-Indo-European "*suhlio-"). Sulis was the local goddess of the thermal springs that still feed the spa baths at Bath, which the Romans called "Aquae Sulis" ("the waters of Sulis"). Her name primarily appears on inscriptions discovered at Bath, with only a single instance outside of Britain at Alzey, Germany. This is not surprising, as Celtic deities often preserved their archaic localisation. They remained to the end associated with a specific place, often a cleft in the earth, a spring, pool or well. The Greeks referred to
Aphanizomenon flos-aquae samples exceeded the safety value of 1 µg microcystin per gram. University professor Daniel Dietrich warned parents not to let children consume "A. flos-aquae" products, since children are even more vulnerable to toxic effects, due to lower body weight, and the continuous intake might lead to accumulation of toxins. Dietrich also warned against quackery schemes selling these cyanobacteria as medicine against illnesses such as attention deficit hyperactivity disorder, causing people to omit their regular drugs. A Canadian study studying the effect of "A. flos-aquae" on the immune and endocrine systems, as well as on general blood physiology, found that eating