How long have we known this? Since 1931. That’s right. 84 years.
In 1931 Dr. Otto Warburg won the Nobel Prize for showing that cancer thrives in anaerobic (without oxygen), or acidic, conditions. In other words, the main cause for cancer is acidity of the human body.
Also, the presence of high acidity is also a sign that there may be cancer in the body. Otto Warburg was awarded the Nobel prize for his discovery that cancer is caused by weakened cell respiration due to lack of oxygen at the cellular level. According to Warburg, damaged cell respiration causes fermentation, resulting in low pH (acidity) at the cellular level