Tyrosine supplement, 500 mg each pill
30 Capsules
Increase alertness

Tyrosine 500 mg amino acid is a Dietary Supplement that helps increase alertness. *

L Tyrosine is not an essential amino acid since it can be made from the amino acid phenylalanine. It is converted into the catecholamines dopamine and norepinephrine which act as neurotransmitters. 

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Supplement Facts:
Serving Size: 1 Tyrosine Capsule
Servings Per Bottle: 30

Amount Per Serving:
Tyrosine - 500 mg *

Usage: Take 1/3 or 1/2 or a full tyrosine capsule preferably with juice a few minutes before breakfast or as directed by your qualified health consultant. Take no more than half a capsule if you are sensitive to amino acids or taking other supplements and medications.

* Daily value not established.

Q. I recently purchased several bottles of your L-Tyrosine supplement (500mg x 30caps), along with some other natural products. Since then, I've read that tyrosine supplementation may be more effective if it is taken as a multivitamin-mineral complex, mainly because vitamins B6, folic acid and the copper mineral help in its conversion.
  A. We do not think it is necessary to take other vitamins and minerals along with it since most people have plenty of these already in their body to convert this amino acid and metabolize it.

Q. Regarding L-Tyrosine dosage: I've read papers online that have studied plasma tyrosine concentration in regular subjects, and the dosage in the studies confirm 100mg/kg/day is a suitable dosage. Since my mass is 76kg, this would amount to 7.6g per day, which is approx. 15 x 500mg caps. I note however that the dosage instructions on the bottle state "As a dietary supplement take 1 capsule daily with or without meals" It seems to me there's a pretty big difference between 1 capsule per day and 15 capsules. Am I misunderstanding anything?
   A. Sometimes research studies miss obvious adverse reactions that people in real life settings experience. An amount greater than 500 mg often causes nervousness, increased heart rate and anxiety.

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Tyrosine Side Effects, safety, caution, danger, risk
Tyrosine side effects on high doses include rapid heart beat, palpitations, anxiety, restlessness or insomnia. Always start with a small portion of a capsule to see your reaction before proceeding to higher amounts. Consult your doctor before using tyrosine in you have a cardiovascular condition or are taking medicines. Adverse effects may be more prominent if this supplement is combined with SAM-e, St. John's wort, ginseng, sex enhancing herbs, phenylalanine amino acid, and any other nutrient or herb that has a stimulating nature. Tyrosine side effects could occur when this supplement is combined with antidepressant medication such as SSRIs, or amphetamini-like drugs.

Caffeine use
We suggest not drinking more than one cup of coffee if you take a tyrosine supplement. We don't recommend taking it together with caffeine pills.