Below 100mSv, there is "no evidence" that exposure leads to any elevation of cancer risk. At levels covered by the article, ie 1000Bq/kg / 80000 Bq/mSv = 0.0125 mSv/kg.
In other words, you can eat 8 tons of those mush before there is any measurable increase in cancer risk.
And breating the air in Berlin for 1 year is MUCH more dangerous than eating those 8000 kg of mushrooms. (Not to speak about taking a single shot of covid vaccine.)
In other words, dispite being scientifically "true", the net effect of an article like this, is to mislead people into thinking that radiation is a lot more dangerous than it is in reality.
If nuclear were to be treated like other health hazards in our environment, the thresholds should be set somewhere between 10000-100000Bq/kg, depending on how much people would eat of that food in a year, not at 600Bq/kg.