L-tyrosine is a naturally occurring amino acid used by the brain to make neurotransmitters that improve mood, memory, and sense of well-being.*
L-tyrosine is a naturally occurring amino acid used by the brain to make stimulatory neurotransmitters that improve memory, mood, focus, libido, coping ability, and sense of well-being. L-tyrosine supplementation leaves people feeling refreshed after training or manual labor by mitigating some of the short-term stress caused by intensive work.*
NOTE: N-acetyl-L-tyrosine is a more water-soluble form of the amino acid L-tyrosine* Spike Shooter®, Spike® Hardcore Energy, and Spike® Double Shot formulas contain N-acetyl-L-tyrosine. Power Drive® powder contains L-tyrosine.
- Improves mood*
- Reduces common social anxiety*
- Boosts positive outlook*
- Improves memory and learning capacity*
- Improves analytical skills*
- Increases energy*
- Improves concentration*
- Reduces short-term stress*
L-tyrosine is an amino acid used by the brain to make the stimulatory neurotransmitters norepinephrine, epinephrine, and dopamine. And dopamine is involved in emotions, movement, and even the sensations of pleasure and pain.
L-tyrosine is a nootropic that improves memory, analytical skills, concentration, and confidence.
Athletes also find it leaves them feeling refreshed after training by mitigating some of the short-term stress caused by intense work.
- Owasoyo JO et al. Tyrosine and its potential use as a countermeasure to performance decrement in military sustained operations. Aviat Space Environ Med. 1992 May;63(5):364-9.
- Roelands B et al. The effects of acute dopamine reuptake inhibition on performance. Med Sci Sports Exerc. 2008 May;40(5):879-85. doi: 10.1249/MSS.0b013e3181659c4d.
- Shurtleff D et al. Tyrosine reverses cold-induced working memory deficit in humans. Pharmacol Biochem Behav. 1994 Apr;47(4):935-41. doi: 10.1016/0091-3057(94)90299-2.
- Struder HK et al. Influence of paroxetine, branched-chain amino acids and tyrosine on neuroendocrine system responses and fatigue in humans. Horm Metab Res. 1998 Apr;30(4):188-94. doi: 10.1055/s-2007-978864.
- Sutton EE et al. Ingestion of tyrosine: Effects on endurance, muscle strength, and anaerobic performance. Int. J. Sport Nutr. Exerc. Metab. 15:173– 185. doi: 10.1123/ijsnem.15.2.173.
- Tumilty L et al. Oral tyrosine supplementation improves exercise capacity in the heat. Eur J Appl Physiol. 2011 Dec;111(12):2941-50. doi: 10.1007/s00421-011-1921-4.
- Attipoe S et al. Tyrosine for Mitigating Stress and Enhancing Performance in Healthy Adult Humans, a Rapid Evidence Assessment of the Literature. Mil Med. 2015 Jul;180(7):754-65. doi: 10.7205/MILMED-D-14-00594.
- Jongkees BJ et al. Effect of tyrosine supplementation on clinical and healthy populations under stress or cognitive demands--A review. J Psychiatr Res. 2015 Nov;70:50-7. doi: 10.1016/j.jpsychires.2015.08.014.
- Rasmussen DD et al.Effects of tyrosine and tryptophan ingestion on plasma catecholamine and 3,4-dihydroxyphenylacetic acid concentrations. J Clin Endocrinol Metab. 1983 Oct;57(4):760-3. doi: 10.1210/jcem-57-4-760.
Products Containing L-Tyrosine
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.