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Anti-aging Research > L-Tyrosine
L-Tyrosine
Related Topics:
Specific Recommendations:
General Information:
-
L-Tyrosine
- Vitacost Health Library
-
L-Tyrosine for Weight Control
- Vitacost Health Library
- Tyrosine - The Natural
Pharmacist
-
Depression Protocol - Life Extension Foundation -
"Tyrosine is used by the body to
make the neurotransmitters dopamine, norepinephrine, and epinephrine, which
play a role in elevating mood and keeping us alert; 500 to 1500 mg a day is
recommended"
News & Research:
-
Hope
for muscle wasting disease - Science Daily, 11/22/11 -
"The amino acid
L-tyrosine had a "rapid and dramatic impact" on Nemaline Myopathy (NM) in
laboratory tests on mice, significantly improving symptoms of the muscle wasting
disease ... consuming L-tyrosine could significantly improve muscle strength and
mobility in NM, raising the possibility it also could be effective in a range of
other muscular dystrophies ... What's more, the rapid and dramatic impact of
L-tyrosine in NM mice also raises the possibility the supplement may be
beneficial for dystrophy patients and other muscle degenerative conditions"
-
Get the diet scoop: 6 promising supplements, 6 to avoid - CNN, 2/16/07 -
"promising ...
Caffeine ... EGCG
...
Chromium ... Conjugated
Linoleic Acid (CLA) ...
5-HTP ... L-dopa or
L-tyrosine"
-
L-Tyrosine Has No Effect On Endurance
- Intelihealth, 11/6/02
- The Essential Amino Acid Reader - Nutrition
Science News, 1/01
-
Catecholamines Kick Out the Demons of Depression - Life Enhancement
Magazine, 7/99 - "the amino acid
phenylalanine converts to tyrosine, which transforms to dopamine.
Dopamine is the immediate precursor of noradrenaline (see Figure 1).
Dopamine deficiency is implicated in some forms of psychosis and abnormal
movement disorders, such as Parkinson's disease ... when noradrenaline is
insufficiently present, a person's mood or energy levels may decline, even
bottom out - for example, in depression ... One way to ensure sufficient
levels of these essential neurotransmitters is by consuming their nutrient
precursors via supplementation. Phenylalanine can be taken as a nutrient
supplement and neurotransmitter precursor to noradrenaline. Tyrosine does
not provide the same uplifting benefits as phenylalanine, because the latter
is required for the production of a metabolite, PEA, whose mood-elevating
properties augment those of noradrenaline ... Most of the mental failings
that often accompany aging, such as loss of memory, loss of mental alertness
and energy, tendency toward depression, vulnerability to stress, and
Alzheimer's and Parkinson's diseases, are associated with reduced levels of
noradrenaline or dopamine ...
There is a growing body of both anecdotal evidence and clinical observations
showing that phenylalanine supplements can alleviate the symptoms of some
forms of depression. It can also boost various aspects of mental function in
healthy people who wish to maximize their ability to stay that way ... For
the replenishment of noradrenaline, a phenylalanine supplement would be
effective"
-
Natural Remedies for Depression - Nutrition Science News, 2/99
Abstracts:
-
N-acetyl-L-tyrosine as a tyrosine source in adult parenteral
nutrition - JPEN J Parenter Enteral Nutr. 2003
Nov-Dec;27(6):419-22
-
Reduction of Brain Dopamine Concentration With Dietary
Tyrosine Plus Phenylalanine Depletion - Am J
Psychiatry 160:1887-1889, October 2003 -
"Healthy male subjects
were scanned on two occasions: once after receiving a balanced amino acid
drink and once after receiving a drink mixture from which tyrosine
and phenylalanine were omitted ...
Dietary tyrosine and phenylalanine depletion increased [11C]raclopride
binding in the striatum by a mean of 6%. The change in [11C]raclopride
binding correlated significantly with the fall in the ratio of tyrosine and
phenylalanine to large neutral amino acids"
-
Effects of tyrosine, phentermine, caffeine D-amphetamine, and
placebo on cognitive and motor performance deficits during sleep deprivation
- Nutr Neurosci. 2003 Aug;6(4):237-46 -
"administered placebo, tyrosine 150 mg/kg, caffeine 300 mg/70 kg, phentermine 37.5 mg and
D-amphetamine 20 mg at 15.30 h following overnight sleep deprivation and
compare their effects on cognitive and motor performance in healthy young
men ... Although less effective than D-amphetamine, tyrosine improved
performance on several tests ... tyrosine may deserve further testing"
- See
iHerb
or
Vitacost
l-tyrosine products.
-
A comparison of tyrosine against placebo, phentermine,
caffeine, and D-amphetamine during sleep deprivation
- Nutr Neurosci. 2003 Aug;6(4):221-35
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