L-Tyrosine

width=L-Tryrosine is another one of the few diet pill ingredients that is backed by considerable research. L-Tyrosine is an amino acid that helps cells to synthesize proteins. It is an important part of neurotransmitters (they relay, amplify, and modulate signals be cells and neurons).

Research

Research supports claims of the many benefits of L-Tyrosine. Some of those benefits include increased performance (exercise), weight loss (that’s due to stress), and help with stress levels. Some research references follow:

  • Mahoney CR, Castellani J, Kramer FM, Young A, Lieberman HR (2007). “Tyrosine supplementation mitigates working memory decrements during cold exposure”. Physiology and Behavior ((http://www.ncbi.nlm.nih.gov/pubmed/17585971?dopt=Abstract))
  • Deijen JB, Orlebeke JF (1994). “Effect of tyrosine on cognitive function and blood pressure under stress”. Brain Res. Bull. 33 (3): 319–23. ((http://www.ncbi.nlm.nih.gov/pubmed/8293316?dopt=Abstract))
  • Hao S, Avraham Y, Bonne O, Berry EM (2001). “Separation-induced body weight loss, impairment in alternation behavior, and autonomic tone: effects of tyrosine”. Pharmacol. Biochem. Behav. 68 (2): 273–81. ((http://www.ncbi.nlm.nih.gov/pubmed/11267632?dopt=Abstract))
  • Reinstein DK, Lehnert H, Wurtman RJ (1985). “Dietary tyrosine suppresses the rise in plasma corticosterone following acute stress in rats”. Life Sci. 37 (23): 2157–63. ((http://www.ncbi.nlm.nih.gov/pubmed/4068899?dopt=Abstract))

Conclusion

When an ingredient is backed by so much research (and there’s more than the few that I’ve posted here), it’s easy to approve of. It’s important to note that the amount of L-Tyrosine that is effective in the 500 mg to 1,500 mg per day range. Make sure that your diet pill isn’t just slipping a little in and flouting the Tyrosine name. L-Tyrosine should be an effective ingredient in addition to others in your weight loss pill (especially if exercise is a key part of your weight loss plan). Thumbs up from us.

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