Tyrosine | Buy Tyrosine | L-Tyrosine - Quest 500mg 30 capsules

	Good for: Regulation of mood, and combatting depression and reducing stress
	Things to be aware of:  Food supplements should not be used as a substitute for a varied diet. p&p from £2.50+VAT no matter how much you buy!

L-Tyrosine

Tyrosine is a nonessential amino acid that is synthesized in the body from phenylalanine. As a building block for several important brain chemicals, tyrosine is needed to make epinephrine, norepinephrine, serotonin, and dopamine, all of which work to regulate mood. Deficiencies in tyrosine, therefore, have been associated with depression. Tyrosine also aids in the production of melanin (pigment responsible for hair and skin color) and in the function of organs in the body responsible for making and regulating hormones, including the adrenal, thryroid, and pituitary glands. Tyrosine is also involved in the synthesis of enkephalins, substances that have pain-relieving effects in the body.

Low levels of tyrosine have been associated with low blood pressure, low body temperature, and an under active thyroid.

Stress
Human and animal research suggests that tyrosine acts as an adaptogen, helping the body adapt to and cope with the effects of physical or psychological stress by minimizing the symptoms brought on by stress. This is primarily due to the fact that tyrosine is a building block for norepinephine and epinephrine, the body's two main stress-related hormones. Taken ahead of time, tyrosine allows some people to avoid typical bodily reactions and feelings from stressful situations like surgery, emotional upset, and sleep deprivation.

Depression
Tyrosine levels are occasionally low in depressed patients. A number of studies conducted in the 1970s showed encouraging results regarding the use of tyrosine to ease symptoms of depression, especially when used together with another supplement known as 5-hydroxytryptophan (5-HTP). In one study from 1990, however, tyrosine failed to demonstrate any anti-depressant activity. More studies are needed in order to draw firm conclusions about the use of tyrosine to help treat mild to moderate depression.  

PMS                                                                                                                     Similarly, serotonin levels may be altered in women who have premenstrual syndrome (PMS). Because tyrosine stimulates the production of serotonin, some experts speculate that L-tyrosine supplements may improve serotonin levels and decrease PMS symptoms. This theory has yet to be proven.

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Dosage

Directions: One to four capsules daily on an empty stomach

Suitable for Vegetarians and Vegans
 
Nutritional Information 
Name                                Amount            R.D.A.
L-Tyrosine                           500 mg               0

Additional Ingredients:
Capsule Shell (Hydropropylmethylcellulose, Water), Bulking Agent: Microcrystalline Cellulose, Magnesium Stearate. 

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Does it work?

Clinical studies have shown that the removal of tyrosine can lead to depression and lowering of the mood.  

Neuropsychopharmacology (2000) 22 52-63.10.1038/sj.npp.1395410

Effects on Mood of Acute Phenylalanine/Tyrosine Depletion in Healthy Women

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