L Tyrosine capsule

Tyrosine is not an essential amino acid since tyrosine can be made from the amino acid phenylalanine. Tyrosine can be converted into dopamine and norepinephrine. Supplementation with both tyrosine and phenylalanine leads to alertness and arousal.
   Phenylalanine and tyrosine are sometimes prescribed as antidepressants, usually in combination with other nutrients and herbs that have mood elevating properties. Some doctors also recommend these amino acids for appetite control. Phenylalanine may trigger the release of an appetite-suppressing hormone in the gut called cholecystokinin. Most individuals who take either of these amino acids notice improved alertness, mental arousal, and mood, and slight loss in appetite. Tyrosine-N-Acetyl is another option.
      A combination of hoodia, ginger, cinnamon, green tea extract, spirulina, acetyl-l-carnitine, choline, guggul, and several other herbs and nutrients, as found in Diet Rx, a very effective herbal diet pill for weight loss. Users of Diet Rx have lost several pounds within a week or two. Diet Rx does not have tyrosine.

Tyrosine 750 mg, Club Natural
L Tyrosine Supplement Facts
L Tyrosine - 750 mg

If you plan to take tyrosine, limit your dose initially to a third or half a capsule until you find out how tyrosine reacts in your system.

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Conversion of Tyrosine
Phenylalanine to Tyrosine to L Dopa to Norepinephrine to Epinephrine

L Tyrosine Questions
Q. I wanted to write to you about Tyrosine. I started taking 500 mgs. of Tyrosine once a day, after about 2 months, I noticed that a lymph node began to appear in my throat area, I discontinued using the Tyrosine, and the lymph node went away. When my fibromyalgia symptoms reappeared after about 1 year. I decided to try it again. I began the 500 mg dose again for another 2 months, and then one morning I awoke to a swollen neck on the right side. After months of tests to rule out everything from thyroid disease to Lymphoma, they could not find anything. But I remembered that the Tyrosine had caused the lymph node from before. Ever since then I discontinued it. Why would it seem like the Tyrosine caused these symptoms? Would a smaller dose be more beneficial because when I did use the Tyrosine, I did not suffer from any other symptoms, and it did help me feel better.
   A. Hi this is interesting, this is the first we have heard of this connection between tyrosine and lymph node enlargement.

Q. I have been taking 500mg a day of L-Tyrosine since June 2006 in combination with 500 mg of Para Thyrolate, and vitamin B (as prescribed by a nutritionist.) Also, I have high blood pressure and have been taking hydrocholorathiazide for the past two years. On Friday December 22 I had a Grand Mal Seizure followed by a second one 5 hours later. I have never had a seizure before in my life and I am 36 years old. The day of the seizure I had been feeling like I was coming down with a cold or flu and barely ate anything all day. I have been reading up on the side effects of L-Tyrosine and realized that I have been experiencing side-effects for quite some time; heart palpitations
and what appeared to be mini panic attacks. Has L- Tyrosine ever been documented to cause seizures? At the hospital they ran lots of tests and could not seem to find anything wrong with me so the seizure remains unexplained.
   A. Although we have not come across any published studies regarding the role of l tyrosine on seizure inducement, we can not rule out the possibility, that, in some people, it is possible that high doses of l tyrosine could reduce the threshold for a seizure to occur. This is just speculation since we have not seen actual research blaming l tyrosine supplement use and seizure occurrence.

Q. Can one over-dose on 500 mg. L-Tyrosine on a daily basis for one month or two? What side effects might be expected L-Tyrosine? Thank you. I've learned so much from your website already.
   A. Yes, tyrosine can cause heart rhythm problems.

Q. Is it safe to keep taking l tyrosine while on prescribed Remeron medication?
   A. Remeron is the product name for mirtazapine, an antidepressant that became available in 1997. Remeron is used for moderate or severe depression, for treating anxiety, motor retardation, and cognitive and sleep disturbances associated with depression. Remeron has a tetracyclic chemical structure that makes it different from other common antidepressants (SSRIs, MAOIs, and tricyclics). While stimulating norepinephrine and serotonin release, Remeron also blocks two specific serotonin receptors. When combining supplements and medications, potential side effects are mostly dependent on the dosage used and the person taking the supplement. Many factors are involved and what works for one person may not work for another. A low tyrosine dosage may cause no side effects, but a higher one could.

Q. Can L Tyrosine can be used in place of or in addition to Carbidopa for Parkinson's disease?
   A. L Tyrosine is not an effective supplement for those with Parkinson's disease. We have no experience using tyrosine as an add on to Carbidopa, so we don't know.

Q. Tyrosine even at 1200 mg doesn't do much for me (minor concentration boost) and I find that it puts more of a lid on my functioning if I take it for more then a day or two at a time, not to mention it only seems to help for about 2 hours. N-Acetyl Tyrosine has been said to be more potent (what dosage of regular Tyrosine compared to the Acetyl version) and marketing for it says that it is more stable, does that mean that it will stay in the blood stream longer?
   A. We have not seen scientific comparisons between acetyl tyrosine and regular tyrosine, but the dosage of acetyl tyrosine may be a third or quarter of the tyrosine dosage in many people. We don't find tyrosine to be as good a mind booster as some of the other supplements.

Q. I have often thought that I have hypothyroidism because it runs in my family. I have a lot of the symptoms too. So, I took L Tyrosine for a couple of days and I started getting hot flashes. So I stopped but the hot flashes continued and now it has been over 2 weeks. I was supposed to start menstruating around the same time but it hasn't happened yet. I'm wondering if I kick started my body into menopause by speeding up my thyroid. Have you heard of anything like that before? And, if so, should I start up the L Tyrosine again in smaller doses for the hypothyroid symptoms?
   A. Tyrosine can elevate body temperature but this should go away within a day or two or a few days after stopping it. We can't make recommendations whether to restart or not take the l tyrosine supplement since that is a decision you and your doctor would need to make.

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