and thats the best I found which explains why ..
"
Why is Aspartame Harmful to Your Health? To put it simply, aspartame is toxic to your nervous system. Enough exposure to aspartame can lead to nerve cell death.
Aspartame - also know as 1-aspartyl 1 phenylalanine methyl ester - is made up of the following components:
- Wood Alcohol (methanol) - about 10%
- Phenylalanine - about 50%
- Aspartic acid - about 40%
Problems with Wood Alcohol The United States Environmental Protective Agency says that the average person can consume 7.8 milligrams of wood alcohol per day without negative effects - some cans of diet soda have been found to have double this amount.
Although wood alcohol naturally occurs in some of the foods that we eat, it doesn't come naturally bound to amino acids as it does in aspartame. Rather, in nature, wood alcohol typically comes attached to fiber that allows it to pass through the digestive tract without being absorbed into the bloodstream.
Since wood alcohol that comes with aspartame doesn't have fiber to keep it out of your bloodstream, just about all of it gets absorbed into your blood, where it can spontaneously convert to formaldehyde, a poisonous substance that is an established carcinogen.
Metabolism of formaldehyde in your body can lead to the production of formate, a waste product that, if accumulated in large amounts, can cause metabolic acidosis and ensuing blindness, kidney damage, and even death. Clearly, this could only potentially happen if you consume extremely large quantities of aspartame and your body's buffering mechanisms fail to prevent metabolic acidosis."
"
Problems with Phenylalanine When exposed to high temperatures or simply stored for a long period of time, aspartame breaks down into a few different compounds, one of which is aspartylphenylalanine diketopiperazine (DKP).
There is
some evidence to suggest that DKP can undergo a nitrosation process in the stomach, which can lead to the production of a chemical that may cause brain tumors.
Since many food products and beverages are exposed to extremely high temperatures during distribution and storage, especially in areas of the world where the climate is hot year-round, the presence of and potential harmful effects of DKP become more worrisome in regions and countries that are closer to the equator.
Also, it's worth noting that whenever your body is exposed to a sudden surge in phenylalanine, the break down of phenylalanine to a larger-than-normal supply of neurotransmitters (L-dopa, norepinephrine, and epinephrine) may create imbalances in nerve signaling that may cause any number of symptoms, including:
- Anxiety attacks and nervousness
- Seizures
- Headaches
- Heart palpitations"
"
Problems with Aspartic Acid Like phenylalanine, aspartic acid is an amino acid that naturally occurs in foods. When your body obtains these amino acids along with other naturally occurring amino acids, enzymes, vitamins, and minerals, your cells can put phenylalanine and aspartic acid to use for normal metabolic activities.
When you introduce abnormally large amounts of phenylalanine and aspartic acid (synthetically bound together by an ester bond) into your bloodstream - which is exactly what happens whenever you drink a can of soda that is sweetened with aspartame - your cells can be overwhelmed.
Specifically, a surge in aspartic acid can lead to over-stimulation of nerve cells and sometimes even nerve cell death - this overstimulation is what Dr. Blaylock refers to as
excitotoxicity.
The risk of experiencing nerve cell death from ingesting too much aspartame is higher in people who smoke, have high blood pressure, or have diabetes, as all of these factors potentially increase the permeability of the blood-brain barrier that is supposed to protect your nerve cells against excitotoxins. It's safe to assume that the more your overall health is compromised, the more susceptible your nerve cells are to the toxic effects of aspartic acid.
Pregnant and nursing moms should know that babies in the womb and newborns are particularly susceptible to having aspartic acid cross the blood-brain barrier, so it's especially advisable to avoid aspartame during these times."