And gentics. Some people/families are just more prone to cancer than others.
A long while ago i read about this and a link to wealth. Of those families with know genetic problems, the poor ones seems to have actively dealt with the issue internally after realizing the problem. They adopt, have fewer children, or use surrogacy. They cannot afford sickly kids. But wealthy families did not, the best examples being those royal families with known problems.
Personally, my cancer risks went way up when my heavy-smoker uncle died of throat cancer. Going from zero cancer in related family to "some" moved me up the charts.
There is an easy line to draw between the two. "Family history", which includes eating/smoking/drinking habits, follows habitation. Genetics follows blood. So differences between bloodlines easily stand apart from family trends.
Really no, not that many, 5-10% estimated. And I'd not be surprised if a lot of the "everyone in the family get cancers" aren't environmental either (factory next door, working in a field using chemicals, etc.)
No. This is 5-10% are from inherited genetic issues, not environment. And that is the canadian cancer society saying so, not a random website or drug company. 5-10% is a monumental number of cancers. If someone came out with a drug to reduce cancers across the board by 5-10% there would be talk at the Nobel commitee.
A long while ago i read about this and a link to wealth. Of those families with know genetic problems, the poor ones seems to have actively dealt with the issue internally after realizing the problem. They adopt, have fewer children, or use surrogacy. They cannot afford sickly kids. But wealthy families did not, the best examples being those royal families with known problems.
Personally, my cancer risks went way up when my heavy-smoker uncle died of throat cancer. Going from zero cancer in related family to "some" moved me up the charts.