Amino acids are the precursors of these neurotransmitters. In double-blind research, a group of alcoholics were treated with 1. This nutritional supplement regimen led to a significant reduction in withdrawal symptoms and decreased stress in alcoholics compared to the effects of placebo.
L-tyrosine is the direct precursor to L-dopa. Theoretically, supplementing L-tyrosine could be an alternative to L-dopa therapy; however, L-tyrosine should not be taken with L-dopa as it may interfere with the transport of L-dopa to the brain.
One small preliminary trial demonstrated that some people with Parkinson's disease who supplemented with L-tyrosine 45 mg per pound of body weight for three years had better clinical results and fewer side effects than did patients using L-dopa. Until these findings are confirmed, L-tyrosine should not be used as a replacement for, or in addition to, L-dopa.
Most people should not supplement with L-tyrosine. Some human research with people suffering from a variety of conditions used mg per 2. The appropriate amount to use in people with PKU is not known, therefore, the monitoring of blood levels by a physician is recommended. Dairy products, meats, fish, wheat, oats , and most other protein-containing foods contain tyrosine.
Some people affected by PKU are deficient in tyrosine. Tyrosine levels are occasionally low in depressed people. Vitamin B6 , folic acid , and copper are necessary for conversion of L-tyrosine into neurotransmitters.
L-tyrosine has not been reported to cause any serious side effects. However, it is not known whether long-term use of L-tyrosine, particularly in large amounts such as more than 1, mg per day is safe.
For that reason, long-term use of L-tyrosine should be monitored by a doctor. A multivariate analysis of red blood cell membrane transports and plasma levels of L-tyrosine and L-tryptophan in depressed patients before treatment and after clinical improvement. Neuropsychobiology ; Clinical results of long-term treatment with a low protein diet and a new amino acid preparation in patients with chronic uremia.
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Here are 14 foods and supplements to help you recover from an injury more…. Health Conditions Discover Plan Connect. Tyrosine is a popular dietary supplement used to improve alertness, attention and focus.
Share on Pinterest. Stress is something that everyone experiences. Summary Studies show that tyrosine can help maintain your mental capacity when taken before a stressful activity. However, there is no evidence that supplementing with it can improve your memory. Summary PKU is a serious condition that may cause tyrosine deficiency. Statements made on this website have not been evaluated by the U. Food and Drug Administration. Products sold on this website are not intended to diagnose, treat, cure, or prevent any disease.
Information provided by this website or this company is not a substitute for direct, individual medical treatment or advice. It is the responsibility of you and your healthcare providers to make all decisions regarding your health.
Bulletproof recommends that you consult with your healthcare providers regarding the diagnosis and treatment of any disease or condition. About Spencer Brooks. Spencer Brooks is a science writer with a background in psychopharmacology and nutrition. When he's not writing, he's cooking, studying winemaking, competing in Brazilian jiu jitsu, and rocking out to the greatest hits of the '80s. However, there is no proof that this claim is true or safe. Because tyrosine helps the body produce the mood-influencing chemical dopamine, and because people who are depressed often have low levels of tyrosine, researchers thought that tyrosine might help treat depression.
However, studies have found that it has no effect. Preliminary research suggests that tyrosine kinase inhibitors may play a role in the treatment of thyroid cancer. Other studies suggest tyrosine kinase inhibitors may help improve lung function among people who have lung cancer or pulminary fibrosis. Tyrosine is found in soy products, chicken, turkey, fish, peanuts, almonds, avocados, bananas, milk, cheese, yogurt, cottage cheese, lima beans, pumpkin seeds, and sesame seeds.
Take tyrosine supplements at least 30 minutes before meals, divided into 3 daily doses. Taking vitamins B6, B9 folate , and copper along with tyrosine helps the body convert tyrosine into important brain chemicals. Doses vary. Talk to your nutritionist or doctor about what dose is right for you. To treat symptoms of sleep deprivation, one study used mg per kilogram of body weight per day.
Because of the potential for side effects and interactions with medications, you should take dietary supplements only under the supervision of a knowledgeable health care provider. People who have migraine headaches should avoid tyrosine, as it can trigger migraine headaches and stomach upset. People with hyperthyroidism or Graves disease should avoid tyrosine supplements because tyrosine may increase levels of thyroid hormone.
If you are being treated with any of the following medications, you should not use tyrosine supplements without first talking to your health care provider. People taking MAOIs should avoid foods and supplements containing tyrosine.
MAOIs include:. Thyroid hormone -- Tyrosine is a precursor to thyroid hormone, so it might raise levels too high when taken with synthetic thyroid hormones. Levodopa L-dopa -- Tyrosine should not be taken at the same time as levodopa, a medication used to treat Parkinson's disease. Levodopa may interfere with the absorption of tyrosine. Carhill AA, et al.
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