@drob31 I too got a fairly immediate hit from Tyrosine. If you try amino acids on your tongue you will usually respond within 10 minutes if it will affect you. It amped me up pretty good. However that pushed my poor functioning adrenals into a crash. I hope you are not headed for a crash and further damage. If you are feeling tired it would be wise to avoid this stimulant which could push you too far. Tread with caution.
Phenylalanine and tyrosine are precursors to the body's three "fight or flight" hormones,
dopamine, epinephrine (adrenaline) and norepinephrine.
Phenylalanine---converts to--->
Tyrosine---converts to--->
DOPA---converts to--->
Dopamine
Independent Supportive Research:
University of Nebraska at Lincoln
Indiana State University
Rensselaer Polytechnic Institute
Unfortunately it is not always the fix to supply what is missing to feel good. One can overload a system that the body has down-regulated because it cannot handle the load...something else may be in need of repair.
Julia Ross published a book on using amino acids for mood as certain amino acids are precursors to certain neurotransmitters and thus affect neurotransmitter deficiency. She posted a questionnaire which can help you figure out which amino acids might affect you. It certainly gives you a clue as too how your system is operating. See:
http://moodcure.com/take_the_mood_type_questionnaire.html
This article may also be of interest:
https://nootriment.com/l-tyrosine-for-anxiety/
"Tyrosine is a precursor to neurotransmitters and hormones
In dopaminergic cells in the
brain, tyrosine is converted to
L-DOPA by the
enzyme tyrosine hydroxylase (TH). TH is the
rate-limiting enzyme involved in the synthesis of the
neurotransmitter dopamine. Dopamine can then be converted into other
catecholamines, such as
norepinephrine (noradrenaline) and
epinephrine (adrenaline).
The
thyroid hormones
triiodothyronine (T3) and
thyroxine (T4) in the
colloid of the
thyroid also are derived from tyrosine.
Tyrosine is a precursor to
neurotransmitters and increases plasma neurotransmitter levels (particularly dopamine and norepinephrine),
[15] but has little if any effect on mood in normal subjects.
[16][17][18]"
https://en.wikipedia.org/wiki/Tyrosine
"It's rare to be deficient in tyrosine. Low levels have been associated with low blood pressure, low body temperature, and an underactive thyroid.
This does not mean, however, that taking tyrosine supplements will help any of these conditions."
http://www.umm.edu/health/medical/altmed/supplement/tyrosine
[PDF]
Neurotransmitter Deficiency and Cortisol Excess - The Mood Cure
https://www.moodcure.com/pdfs/Townsend-Letter-NNTI article.docx.pdf
... in response to a T.L. article, “The
Cortisol-Sleep ... and well to neurotransmitter precursors such as
GABA, tryptophan, and/or melatonin. Others ....
exacerbated by the use of the stimulating amino acid, l-tyrosine.
Repletion and balancing of amino acids:
https://www.drlam.com/blog/brain-boosting-supplements-and-afs-part-5/11234/
https://www.drlam.com/blog/biological-rhythm-disruptions-and-adrenal-fatigue-syndrome-part-2/11319/
http://amino-acid-therapy.com/neurotransmitters/proper-neurotransmitter-balance/
http://www.livestrong.com/article/431600-what-minerals-convert-amino-acids-to-dopamine-serotonin/
L-Tyrosine Deficiency Symptoms + Warning Signs of Low Dopamine
https://nootriment.com/l-tyrosine-deficiency/