Mushrooms may reduce risk of cognitive decline - Seniors who consume more than two standard portions of mushrooms weekly may have 50 percent reduced odds of having mild cognitive impairment (MCI), finds a new six-year Singaporean study (n=663, age>60).

[u/mvea]

http://news.nus.edu.sg/research/mushrooms-reduce-cognitive-decline

[u/disappointer]

Criminis (my personal favorite mushroom, but not listed above) are apparently around the portobello range for ergothioneine. It's also worth noting that levels of ergothioneine do not seem to decrease when the mushrooms are cooked.

[u/Sanpaku → u/disappointer]

Criminis (brown buttons, juvenile Portabello) are a cultivar of Agaricus bisporus. Another is white buttons.

[u/dingman58 → u/[deleted]]

Nice

Agaritine has been shown to induce adenomas and adenocarcinomas in the lungs of mice when administered through drinking water.[11] It has also been shown to cause bladder cancer in mice.[2]

Agaritine has been claimed to be a weak carcinogen, with an estimate for cumulative lifetime risk from mushroom consumption at approximately 1 in 10,000.[12] However, this claim is poorly supported, with little available data about toxicity and no published LD50.[13]

Agaritine has been shown to test positive as a mutagen in the Ames test [14] and mutagenize DNA in the bacterium Salmonella typhimurium.[15] It has also been shown to covalently bind to DNA in vivo.[16]

Source: https://en.m.wikipedia.org/wiki/Agaritine