Hello Helen
Aspirin is the conversion of salicyclic acid to acetylsalicyclic acid (ASA). I quote from an article about its over- and long-term use:
"Large doses cause acid-base imbalance and respiratory disturbances and can be fatal, especially in children. Acetaminophen (known by trade name Tylenol), which does not cause gastric irritation but does lower fever and relieve pain, is often substituted for Aspirin"]
I believe a lot of long-term users suffer from stomach and/or digestive problems such as ulcers, irritation, etc.
For the prevention and treatment of breast cancer, there is another natural and healthy product - flax hull lignans. They have been found to be very effective in reducing malignant and non-malignant tumours in breast cancers from tests done over the past 2 years.
Flax hull lignans contain secoisolariciresinol glucodise (SDG), high levels. Flax hull lignans is a phytonutrient and phytoestrogen. It is converted in the bowel of humans by good bacteria into mammalian lignans called enterodial (ED) and enterolactone (EL). ED and EL have been proven to be powerful antioxidants and free radical scavengers. They boost the immune system of the body greatly, especially taken with good probiotics that has lots of bifidum bacterium - colon/bowel bacteria.
Flax hull is very effective against a whole range of problems especially with breast, colon/bowel and prostate cancers. Check out these web links:
http://www.google.ca/search?q=cache:10tVAZCk9hAC:www.naturalovens.com/lib/pdf/betterhealth/History_of_Flax.PDF+secoisolariciresinol&hl=en&ie=UTF-8
http://www.renaisante.com/html/current_articles.html#Flaxseed%20Suppl
http://www.chiroweb.com/archives/21/02/14.html
http://www.principalhealthnews.com/topic/topic103411071
They are much better since they are naturally produced without any manufacturing or chemical processes. In addition there are no additivies,
preservatives , coloring or artificial ingredients addded. Great too as soluble and insoluble fibres for constipation provided a lot of water is taken during its use.
www.osumex.com