
Attention Span.Net - The Site For the Informed Parent
Neurotransmitters are chemical messengers that transmit messages
between nerve cells. Neurotransmitters control a wide range of functions.
In addition to thoughts and memories, they control moods such as anger,
depression, and happiness. They also affect appetite, sex, sleep, and rate
of breathing. However, each neurotransmitter is quite specific in its job
and functions. At the beginning of the 1980s, scientists had only discovered
a few neurotransmitters. Now they have found over fifty! However, here we
will focus on the neurotransmitters that are involved with memory and mental
functioning.
Acetylcholine is one of the main neurotransmitters (brain
chemicals which carry messages between neurons). Neurotransmitters make
learning, memory and intelligence possible. The three main nutrients which
are necessary for adequate synthesis of acetylcholine are Choline (a B-vitamin),
Phosphatidyl Choline ("PC", the concentrated, bioactive ingredient
of lecithin), and DMAE (dimethylaminoethanol, the most biologically available
of the acetylcholine precursors). Acetycholine plays a key role in maximizing
mental ability as well as in preventing loss of memory in aging adults.
Acetylcholine
Acetylcholine is the primary neurotransmitter involved with thought and
memory. It is the chemical messenger that certain brain cells use to communicate
with each other. Choline is the basis for the formation of acetylcholine.
A lack of dietary choline will produce a corresponding decrease in memory.
Nutritional supplementation of choline or phosphatidyl choline (lecithin)
can help to restore the deficit.
DHA (Docosahexaenoic acid)
DHA is an omega-3 fatty acid found in eggs, red meats, fish, animal organ
meats and in microalgae. It is the primary building block of the brain and
the retina of the eye. The brain is 60% fat and DHA is the most abundant
fat in both the brain and the retina. It is essential for mental function
and vision. It is also the must abundant fatty acid in human breast milk.
There are well documented studies on the decreased mental and neurological
development of babies whose diet lacked DHA due to the fact that they were
not breastfed or that their formula feeding did not have DHA in it. Likewise,
DHA supplementation has been shown to be helpful in the treatment of ADHD.
John R. Burgess, PhD, of Purdue University, found significantly lower levels
of DHA in children with ADHD when compared to control subjects.
NOTE: DHEA is a steroid made by the adrenal glands and should not be confused
with DHA nor DMAE.
DMAE (Dimethylaminoethanol)
DMAE is basically a choline molecule with one methyl group missing from
the nitrogen. DMAE is more able to cross the blood-brain barrier than choline.
Once inside the brain, an enzyme performs a methylation that converts DMAE
into choline. So, taking DMAE increases the brain's potential to make neurotransmitters.
Dean and Morgenthaler's book, "Smart Drugs and Nutrients"
reports the following effects for DMAE: mood elevation, improvement of memory
and learning, intelligence increases, and increases in the life span of laboratory
animals.
DMAE enhances memory and intelligence. It is a source of choline for the production
of acetylcholine in the brain. DMAE is a naturally-occurring nutrient found
in seafood such as anchovies and sardines.
When 500 mg of DMAE was given to 74 children with learning problems, including
many who were hyperactive. These subjects were screened for neurological or
psychiatric illnesses beforehand. DMAE was given in a double-blind fashion
for 3 months. Testing was done before and after treatment for behavior, reaction
time, and a series of standard psychometric parameters. Not only was there
significant improvement overall but DMAE was shown to improve performance
in children with learning and behavior disorders.
Precautions: Overdosage can produce insomnia, dull headaches,
or tenseness in muscles (especially those of the jaws, neck, and legs). These
side effects disappear if the dosage is lowered slightly. No serious adverse
effects have ever been reported with DMAE. Patients with certain types of
epilepsy should be closely monitored by a physician. DMAE should not be used
by people who are manic because it can deepen the depressive phase.
Dosage: DMAE is used initially at low dosages, with a gradual
buildup to 500 mg or 1000 mg per day. This refers to pure DMAE and not DMAE
bitartrate, which contains only a percentage of DMAE. In some cases, lower
dosages can result in a good response. DMAE can take as long as three weeks
to take effect.
Norepinephrine
Norepinephrine (NE) is another neurotransmitter involved with thought and
memory. It is the chemical messenger that plays an important role in mental
functioning. It seems to be specifically involved with long-term memory. A
decrease in norepinephrine also produces a corresponding decrease in mental
acuity or mental sharpness.
Phosphatidlyserine (PS)
Evidence indicates that phosphatidlyserine helps improve memory and prevent
age-related memory loss. It actually resides in brain cell membranes where
it activates the release of acetylcholine and enhances the transmission of
nerve messages between brain cells.
According to Parris M. Kidd, PhD, oral supplementation with PS benefits cognitive
functions, particularly in adults of mature years. Some 23 human studies are
available on PS. Most involved subjects who had experienced measurable losses
in memory, judgment, abstract thought and other higher mental functions and
sometimes changes in personality and behavior. The PS dose was usually 100
mg. three times daily, initially.
Eleven double-blind, randomized, placebo-controlled trials conducted with
PS in the U.S. and Europe, indicate subjects were significantly improved on:
learning names, faces; recalling names, faces; recalling phone numbers; recalling
misplaced objects; paragraph recall; ability to concentrate. Benefits persisted
at least 4 weeks after PS was discontinued. For name-face acquisition, PS
"rolled back the clock" by about roughly 12 years; from an average
"cognitive age" of 64 to a cognitive age of 52. In other clinical
trials, PS benefited subjects with nerve transmitter deficiencies, mood disorders
and disturbances of their 24-hour daily "clock"-the circadian rhythm.
(Alt Med Rev 1996;1(2):70-84)
AMINO ACIDS
Amino acids are important protein constituents that serve as precursors for
neurotransmitters and enzymes, and as membrane stabilizers.
L-Pyroglutamic Acid is a remarkable partner to acetylcholine,
which may have benefits for memory function. It has also been associated with
increased release of GABA, a key calming neurotransmitter made and used in
the brain. L-Pyroglutamic Acid is a natural amino acid found in many foods,
and it passes the "Brain-Blood Barrier" easily.
Glutamine is the precursor for GABA manufacture in the brain, and it helps
prevent excess amounts of ammonia from damaging the brain.
Tyrosine is a precursor for Noradrenaline and Dopamine, two of the main neurotransmitters
which elevate mood, promote alertness, and increase arousal and motivation.
L-Phenylalanine is a precursor for Tyrosine, and can also be converted to
PEA-Phenlethylamine, a psycho-energizer naturally produced by the brain. Scientists
believe that the PEA found in chocolate is what makes people like it so much.
NOTE: 1 in 15,000 people cannot metabolize phenylalanine, this inability is
called phenylketonuria. These people should not take phenylalanine.
L-cysteine
Cysteine is a sulfur-containing, antioxidant amino acid. It is especially
good at protecting the sensitive cellular membranes of the brain from free
radical damage. It also protects the brain from damage due to alcohol and
cigarette smoke and is a general stimulant to the immune system.
Note: The letter L in front of the names of amino acids indicates the natural
form as found in nature rather than being synthetic. The L forms are more
biologically active.
L-glutamine
Glutamic acid is the brain's backup or emergency source of energy. Glucose
is the brain's primary source of energy. Whenever glucose is in short supply,
the brain utilizes glutamic acid to keep things going. However, glutamine
is the ingredient added to the brain/mind formulas, not glutamic acid. Glutamine
is much more effective at getting across the blood-brain barrier than glutamic
acid. Once in the brain, glutamine is converted into glutamic acid. L-glutamine
has also been effective in increasing the I.Q.s of mentally deficient children.
L-glutamine is also the precursor for the neurotransmitter GABA (gamma-aminobutyric
acid).
L-methionine
Methionine is another sulfur-containing, antioxidant amino acid that protects
brain cells from damage. Methionine also prevents toxic heavy metals such
as mercury and cadmium from accumulating in and damaging the brain. It plays
an essential role in the production of neurotransmitters and energy production.
Taurine
Taurine is major stabilizing ingredient of brain cell membranes, keeping electrical
currents from spreading out of control throughout the brain.
Chromium
Chromium is essential for the metabolism of glucose and the production of
energy.
Folic Acid
Folic Acid is selectively concentrated in the brain and spinal fluid and is
essential to the functioning of the brain.
Inositol
Inositol is a membrane stabilizer found in high concentrations in the cellular
tissue of the brain. It reportedly promotes an anti-anxiety or calming effect.
Magnesium
Magnesium, in particular, seems to have a profound effect on dementias of
various types. Dr. J. Leslie Glick of the Bionix Corporation reviewed the
effects of 1000mg of magnesium in patients with Alzheimer's disease and other
dementias. He reports that magnesium in these doses "may improve memory
and alleviate other symptoms in patients with Alzheimer's". Magnesium
has been reported to enhance cognitive abilities. Additionally, causes vascular
dilation and is known to have anti-anxiety effects.
Potassium
Potassium is responsible for transmitting electrical impulses. It is highly
active in the tissues of the brain and nervous system.
Selenium
Selenium is one of the most important nutritional discoveries of the twentieth
century. It is a nutrient that no individual can afford to overlook. Every
one of the sixty trillion cells in your body needs a small amount of selenium
in order to be protected and function properly. Toxic metals affect the brain
and nervous system before they affect the other organs of the body, just as
many nutritional deficiencies do. Selenium is one of the most powerful detoxifiers
of poisonous heavy metals.
Vitamin B-1 (Thiamine)
Thiamine is essential for the health of brain and nerve tissue. It is also
involved in the chemical reactions that cause the release of acetylcholine
in the brain.
Vitamin B-2 (Riboflavin)
Riboflavin functions as an antioxidant cofactor, taking part in the antioxidant
reactions involving both superoxide dismutase (SOD) and glutathione peroxidase.
Vitamin B-3 (Niacin)
A deficiency of niacin produces memory failure. It functions in over fifty
metabolic reactions, especially those producing energy. Niacin has two forms,
nicotinic acid and niacinamide. Either or both forms can be utilized in nutritional
formulations.
Vitamin B-5 (Pantothenic Acid)
Vitamin B-5 acts as an antioxidant. It is also required for the conversion
of choline to acetylcholine.
Vitamin B-6 (Pyridoxine)
Vitamin B-6 acts as an antioxidant. It is required for the conversion of amino
acids into neurotransmitters in the brain. For example, the conversion of
phenylalanine to norepinephrine requires Vitamin B-6.
Vitamin B-12 (Cobalamin)
Vitamin B-12 is a coenzyme that is particularly important in the brain and
nerve tissues. It is necessary for the synthesis of DNA and RNA; it enhances
the action of Vitamin C and several amino acids; and it is required to build
the walls of brain cells.
Vitamin C (Ascorbic Acid)
Vitamin C is a major antioxidant. It is precursor for the production of the
neurotransmitters norepinephrine, epinephrine, and serotonin. For example,
the production of norepinephrine has been shown to be severely inhibited in
Vitamin C-deficient subjects.
Vitamin E
Vitamin E is a powerful lipid membrane antioxidant that protects brain cells
from free radical damage.
Zinc
The brain contains substantial concentrations of zinc.
It is a necessary cofactor in over twenty different enzymatic reactions and
is essential for the production of the antioxidant enzyme SOD. It also helps
prevent the accumulation of lead that is toxic to the brain.
Important Disclaimer- Please Read This: The following information
in this web site is not intended to provide any type of professional advice
nor diagnostic service. If you have any concerns about ADHD or other health
issues, please consult a qualified health care professional in your community.