Cancer likely caused by a virus and lack of exercise
The studies say 50% of breast cancer mutations/inflammation damage occur on the virus immune system pathways before the cancer shows up after multiple mutations start replicating endlessly, suggesting that those are being manipulated by viruses and the immune system is attempting to defeat the causal agent with serious attacks, inflammation. The other half are probably bacteria, fungi, toxic chemicals, and genetic anomalies. The skin is constantly mutating, cancers can form from the solar radiation. Mostly, before cancer can form, the ATP energy cycle has to malfunction before you get cancerous cells … ATP through the mitochondria drives the functional aspects of the cell that normally limits the replication by monitoring the cell function and looking for errors and damage, once detected it will usually mark itself for apoptosis and the immune macrophages will tear the cell apart, leaving behind the DNA fragments that you see in lots of viral and bacteria infections. The regenerative capacity of cells and organs deteriorates with age. The “powerhouses” of cell function — called mitochondria — lose energy over time and prevent cells from regenerating as they once did. To boost the mitochondrial counts, literally the energy engines in the cell, requires exercise for the most part. There are a few boosters that are NAD+ and active co-q10. Some very good results for reversing the course of cancer are tied to the re-enabling the mitochondrial function, in cancerous cells. But to prevent it, exercise seems to be the best way to keep the mitochondrial counts high.
For most of your life, your immune system successfully fought cancerous cells, killing them as they developed. That’s its job. In fact, the only job Natural Killer cells have is to kill cancer cells and viruses.
For cancer to develop, your immune system must either be worn out, ineffective, unable to kill cancer cells as fast as they normally develop, or you must be exposed to a mass of cancer causing toxins, radiation or some such thing, that increase the rate of development of cancer cells to such an abnormally high level that your immune system can’t handle it.