PURE L-Tyrosine Capsules

PURE L-Tyrosine Capsules

Edubily provides you with 300 mg of highly pure, optimally dosed L-tyrosine. This important amino acid plays a crucial role in the body, as it is the precursor to several essential neurotransmitters, such as dopamine, norepinephrine, and epinephrine. These neurotransmitters are vital for concentration, motivation, and stress management. In addition, tyrosine is involved in the synthesis of thyroid hormones, which regulate energy metabolism .

What is L-tyrosine, and where is it found?

L-tyrosine is a non-essential amino acid—which means the body can usually produce it on its own. It is one of the 20 proteinogenic amino acids that the body uses to build its own proteins. The name “tyrosine” is derived from the Greek word tyrós, meaning cheese, since the amino acid was first isolated from casein by Justus von Liebig in 1846.

Tyrosine is naturally found in many protein-rich foods—such as meat, poultry, fish, and dairy products like yogurt, cottage cheese, and cheese—as well as in plant-based sources such as soy products, pumpkin seeds, peanuts, sesame seeds, almonds, bananas, and avocados. One egg provides an average of about 250 mg of tyrosine, while a serving of lean meat can contain about 1 g.

Biological Functions of Tyrosine

Tyrosine performs various functions in the body:

• A building block for neurotransmitters: In the central nervous system, tyrosine is converted into L-DOPA through a series of enzymatic reactions—and from there, dopamine, norepinephrine, and epinephrine are produced. These so-called catecholamines are important neurotransmitters that regulate mood, attention, and responsiveness.

• Role in thyroid hormone production: Tyrosine is a precursor to the thyroid hormones triiodothyronine (T3) and thyroxine (T4), which are produced in the thyroid gland from tyrosine and iodine.

• The building block of melanin: Melanin, the skin pigment responsible for skin color and tanning, is also produced from tyrosine.

• A building block in energy metabolism: The benzoquinone structure in coenzyme Q10, which plays a central role in mitochondrial energy production, is synthesized from tyrosine, among other substances.

• Role in signal transduction: In many protein structures, tyrosine—due to its phenolic group—plays a crucial role in phosphorylation, a process necessary for the activation or inhibition of enzymes and signaling cascades in cells.

Tyrosine in Relation to Performance, Stress, and Cognition

Numerous studies—conducted on both animals and humans—have examined how tyrosine can affect physical and mental performance in certain exceptional situations. Under conditions such as stress, cold, sleep deprivation, or intense mental strain, tyrosine has, in some cases, been shown to positively influence concentration, working memory, and reaction time.

It is believed that tyrosine supports neurotransmitter balance through its role as a precursor to dopamine and norepinephrine—especially when the body’s own stores are under strain. Studies using stress models report reduced release of stress hormones as well as improved cognitive stability.

Under normal conditions, however, tyrosine appears to have little effect on mood or performance. It is argued, however, that it can stabilize working memory under high cognitive stress, which has earned tyrosine the nickname “the amino acid of creativity” or “the amino acid of drive” in some contexts.

* See the literature

PURE L-Tyrosine Capsules – Uncompromising Purity

Edubily’s PURE line stands for high-quality products free of unnecessary additives. The L-tyrosine capsules contain only pure L-tyrosine—no fillers, no magnesium stearate, or other additives. The vegan HPMC capsule shell makes the product suitable for a plant-based diet. With 300 mg of L-tyrosine per capsule, the product offers an ideal dosage for daily supplementation.

* See the bibliography:

Chinevere TD, Sawyer RD, Creer AR, Conlee RK, Parcell AC (November 2002). "Effects of L-tyrosine and carbohydrate ingestion on endurance exercise performance". Journal of Applied Physiology. 93 (5): 1590–7. 

Deijen JB, Wientjes CJ, Vullinghs HF, Cloin PA, Langefeld JJ (January 1999). "Tyrosine improves cognitive performance and reduces blood pressure in cadets after one week of a combat training course". Brain Research Bulletin. 48 (2): 203–9.

Deijen JB, Orlebeke JF (1994). "Effect of tyrosine on cognitive function and blood pressure under stress". Brain Research Bulletin. 33 (3): 319–23.

Hao S, Avraham Y, Bonne O, Berry EM (February 2001). "Separation-induced body weight loss, impairment in alternation behavior, and autonomic tone: effects of tyrosine". Pharmacology, Biochemistry, and Behavior. 68 (2): 273–81. 

Leathwood PD, Pollet P (1982). "Diet-induced mood changes in normal populations". Journal of Psychiatric Research. 17 (2): 147–54. 

Lieberman HR, Corkin S, Spring BJ, Wurtman RJ, Growdon JH (August 1985). "The effects of dietary neurotransmitter precursors on human behavior". The American Journal of Clinical Nutrition. 42 (2): 366–70.

Magill RA, Waters WF, Bray GA, Volaufova J, Smith SR, Lieberman HR, et al. (August 2003). "Effects of tyrosine, phentermine, caffeine, D-amphetamine, and placebo on cognitive and motor performance deficits during sleep deprivation". Nutritional Neuroscience. 6 (4): 237–46.

Mahoney CR, Castellani J, Kramer FM, Young A, Lieberman HR (November 2007). "Tyrosine supplementation mitigates working memory deficits during cold exposure". Physiology & Behavior. 92 (4): 575–82.

Neri DF, Wiegmann D, Stanny RR, Shappell SA, McCardie A, McKay DL (April 1995). "The effects of tyrosine on cognitive performance during extended wakefulness". Aviation, Space, and Environmental Medicine. 66 (4): 313–9. 

Rasmussen DD, Ishizuka B, Quigley ME, Yen SS (October 1983). "Effects of tyrosine and tryptophan ingestion on plasma catecholamine and 3,4-dihydroxyphenylacetic acid concentrations". The Journal of Clinical Endocrinology and Metabolism. 57 (4): 760–3. 

Reinstein DK, Lehnert H, Wurtman RJ (December 1985). "Dietary tyrosine suppresses the rise in plasma corticosterone following acute stress in rats". Life Sciences. 37 (23): 2157–63.

Strüder HK, Hollmann W, Platen P, Donike M, Gotzmann A, Weber K (April 1998). "Influence of paroxetine, branched-chain amino acids, and tyrosine on neuroendocrine system responses and fatigue in humans". Hormone and Metabolic Research. 30 (4): 188–94.

Thomas JR, Lockwood PA, Singh A, Deuster PA (November 1999). "Tyrosine improves working memory in a multitasking environment". Pharmacology, Biochemistry, and Behavior. 64 (3): 495–500.

Frequently asked questions and answers from Edubily

Does the product contain fillers?

No, the capsules are part of the PURE line, which contains only pure L-tyrosine—with no additives or fillers.

Is the product vegan?

Yes, both the L-tyrosine it contains and the HPMC capsule shell are 100% vegan.

Who should not use this product?

L-tyrosine capsules are not suitable for pregnant or breastfeeding women.

 

Nutritional Information

Contents	per serving (= 1 capsule)
L-tyrosine	300 mg

Ingredients

L-tyrosine, hydroxypropyl methylcellulose (capsule shell).

Recommended use: Take 1 capsule daily with plenty of water.

Notes: Do not exceed the recommended daily dose. This product is not a substitute for a balanced and varied diet and a healthy lifestyle. Keep out of reach of small children. Store in a cool, dry place away from direct light.

This product is not recommended for pregnant or breastfeeding women.

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Quality and safety at the highest standard

Edubily attaches great importance to developing and manufacturing products on a scientifically sound basis. Its products are manufactured by experienced partners in Germany and Austria, who are regularly inspected without prior notice and are certified according to IFS Food and HACCP. Edubily thus meets strict hygiene and safety requirements. In addition, all products are checked again in independent laboratories for factors such as heavy metals, nutrient content, and possible contaminants. Edubily's goal is not simply to offer any old dietary supplements, but to provide safe and effective products that promote health and well-being through well-thought-out formulas and continuous development. This means that fitness athletes and health-conscious individuals can be sure that they are getting a high-quality and responsibly designed product.