More On Amino Acids
For Coping With Depression
Besides the above well-known amino acids like tryptophan, tyrosine and L-phenylalanine that are useful when coping with depression naturally, there are some other amino acids that may be helpful, as listed below.
If you are interested, you could read more about how amino acid imbalances can be a cause of depression.
Alanine – converts quickly to usable glucose and prolongs blood sugar stability (helpful for hypoglycemia, a possible cause of depression). Combined with high doses of B6, this amino acid can also help reverse immune deficiency (another contributor to depression) by producing lymphocytes .
Arginine – detoxifies excess ammonia (a waste product from the breakdown of worn-out proteins; contributes to muddled thinking and mental fogginess) from the brain. It also stimulates the immune system by enhancing the production of T cells. Note that it should be used with caution by those with schizophrenia and herpes. 
Aspartic Acid (Asparagine) – helps detoxify ammonia and promotes the uptake of trace minerals (of which deficiencies can contribute to depression) in the gut. It plays an important role in brain energy metabolism. It is often found to be low in levels in the brains of those with unipolar depression. 
Orthomolecular practitioners like Sheldon Hendler and Eric Braverman have observed low levels of this amino acid in the blood of their depressed patients .
Carnitine – helps combat fatigue and provide energy for tissues by increasing the oxidation of long-chain fatty acids, and as such can be useful for coping with depression. 
Citrulline – plays a role in ammonia detoxification, stimulates growth hormones and is a precursor of amino acids Arginine and Ornithine. 
Cysteine – helps tissue repair through acetaldehyde detoxification, promotes iron absorption (deficiency in iron can contribute to depression). 
GABA (Gamma-aminobutyric Acid) – induces calm and tranquility  and hence may benefit the anxious, irritable or bipolar depressive when coping with depression naturally. However, because too much of this natural tranquilizer can also trigger or worsen depression, the dosage of this amino acid should be built up slowly . This amino acid is also a neurotransmitter. 
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