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Amino Acid - L-Tyrosine 500 mg Caps (90 Count)

Availability: In stock
Stock Number :AAP-125-SC-090
  • Bone, Joint, and Musculoskeletal
  • Mood and Stress
  • Weight Management
  • Quick Notes:

    • Tyrosine is a direct precursor to several important neurotransmitters including norepinephrine and dopamine. These neurotransmitters can affect and improve mood and improve mental wellbeing. Norepinephrine and dopamine also modulate stress response, satiety, and sex drive.

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    List Price: $22.67

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    Product Information

    Quick Notes:

    • Tyrosine is a direct precursor to several important neurotransmitters including norepinephrine and dopamine. These neurotransmitters can affect and improve mood and improve mental wellbeing. Norepinephrine and dopamine also modulate stress response, satiety, and sex drive.
    • Tyrosine is essential for thyroid hormone synthesis including thyroxine and melanin. Thyroxine is an essential hormone for proper management of the metabolism.
    • This formula uses the L form of Tyrosine because it is closer to that which is manufactured by the body.
    • Tyrosine is important for proper adrenal and pituitary function.
    • Helps support energy levels!
    • May support a healthy mood!
    • Free form amino acid.
    • Convenient, easy to swallow capsule.


    This formula uses the L form of Tyrosine because it is structurally similar to tyrosine manufactured by the body A conditionally essential amino acid, L-Tyrosine is one of the most important elements in maintaining neurotransmitter balance in the brain. L-tyrosine is a precursor of adrenaline, norepinephrine, dopamine, and thyroid hormones. Tyrosine also promotes the healthy functioning of the adrenal and pituitary glands. Since the adrenal gland regulates stress hormones, requirements of tyrosine increase during times of elevated stress. Recent studies indicate that tyrosine supplementation may reduce the effects of stress. Researchers theorize that this is because tyrosine is the precursor for epinephrine, a neurotransmitter that helps manage the body’s response to stress. Tyrosine was found to be effective in alleviating stress and increasing mental alertness in a study conducted on U.S. Marines who were sleep deprived.

    Research indicates:

    • May support a healthy mood
    • Important to the production of norepinephrine, a neurotransmitter that helps maintain a healthy appetite.
    • May support healthy brain function
    • Important to the production of dopamine
    • Important component of the thyroid hormones


    Amino Acids


    Suggested Use: Take 1 capsule daily with food.

    Storage: Keep in a cool, dry place.

    Allergy Warnings:

    This product is contraindicated for individuals with hypersensitivity to any of its ingredients.


    • Everyone has unique body chemistry. All patients should be aware of potential drug and supplement interaction. You are encouraged to consult with your primary health care professional before taking any supplement product.

    • If you are taking any antidepressant medications please consult with your primary health care professional before taking this product.

    • In some cases high doses of L-Tyrosine may cause nausea, diarrhea and/or vomiting. If you experience these symptoms, discontinue use and consult a health care practitioner immediately.

    Pregnancy Warning:

    If you are pregnant, nursing, have any health condition, or are taking any medications please consult with your health care practitioner before using this product.

    Keep out of reach of children.


    • The following scientific literature references, articles, and statements have not been evaluated by the Food and Drug Administration (FDA).
    • This product is not intended to treat, cure or prevent any disease.
    • Information about this product is intended for your general knowledge only and is not a substitute for professional medical advice or treatment.
    1. Sutton EE, Coill MR, Deuster PA, et al. Ingestion of tyrosine: effects on endurance, muscle strength, and anaerobic performance. Int J Sport Nutr Exerc Metab.2005;15:173-85.

    2. Deijen JB, Wientjes CJ, Vullinghs HF, et al. Tyrosine improves cognitive performance and reduces blood pressure in cadets after one week of a combat training course. Brain Res Bull. 1999;48:203-209.

    3. Neri DF, Wiegmann D, Stanny RR, et al. The effects of tyrosine on cognitive performance during extended wakefulness. Avit Space Environ Med. 1995;66:313-319.

    4. Gelenberg AJ, Wojcik JD, Falk WE, et al. Tyrosine for depression: a double-blind trial. J Affect Disord. 1990; 19:125-132.

    5. Reimherr FW, Wender PH, Wood RD, et al. An open trial of L-tyrosine in the treatment of attention deficit disorder, residual type. Am J Psychiatry. 1987;144:1071-1073.

    6. Wood RD, Reimherr FW, Wender PH, et al. Amino acid precursors for the treatment of attention deficit disorder, residual type. Psychopharmacol Bull. 1985;21:146-149.


    Frequently Asked Questions - Amino Acids

    • What are amino acids?

      Amino acids are the building blocks of protein and are critical for the body to function properly. Protein has an important job in building and rebuilding body tissue and providing the body with nitrogen, an essential element for all living beings. They are absolutely vital and have wide-ranging roles, including the repair and maintenance of muscles, organs, ligaments, connective tissues, glands, nails, hair, skin, etc.  Amino acids are considered the building blocks of life a deficiency in even one of them can have detrimental effects on one’s health and well-being.


      There are both essential and nonessential amino acids. Essential amino acids must be obtained from the diet while nonessential amino acids are made by the body.

       The following is a list of the essential and nonessential amino acids:















      Aspartic acid

      Cystine (cysteine)

      Glutamic acid








    • What is the difference between essential and non-essential amino acids?

      Generally speaking, there are twenty critical amino acids used by cells in protein biosynthesis. Nine of these amino acids are termed “essential” and need to be acquired from dietary sources; the body cannot produce them. “Nonessential” amino acids, on the other hand, are produced in the body from other amino acids when given an adequate supply of nitrogen, carbon, hydrogen and oxygen.  Nevertheless, in certain life stages or during certain situations even some of these nonessential amino acids are required in such substantial quantities they are considered “conditionally essential”.

    • Are the amino acids in Amino Acid Complex “free form”?

      Yes, they are in free form.

    • Why is there an “L” in front of the amino acids on the label?

      Amino acids are by definition any molecule that contains both amine (amino) and carboxyl functional groups.  All amino acids share this common chemical "backbone" that consists of a carbon atom to which four substituent groups are bonded: a nitrogen-containing amino group (NH2), a carboxyl group (COOH), a hydrogen (H+) atom and an "R" group. 

      The "R" group or side chain varies in electric charge, size, structure and solubility in water, giving each amino acid its distinct chemical properties.  Since all amino acids (except glycine) contain at least one asymmetrical chiral carbon atom, which produces a stereoisomers (mirror image), they exist in nature as two forms (stereoisomers).  The forms are designated as either D- or L-, depending on their structural relationship to a right- or left-handed reference point.  While both forms are found in biological systems, all amino acids constituting proteins are composed of the L-form. DL-amino acids are a 50/50 mixture of both the D- and L- form of the molecule.

    • Is 5-HTP fat soluble?

      5-HTP is an amino acid and the absorption of amino acids in the intestine depends on transporter molecules, so solubility in fat or water is not instrumental for absorption. In addition, the research shows that 5-HTP is effective whether you take it with or without meals.

    • What is the difference between L-Carnitine and Acetyl L-Carnitine?

      L-Carnitine is a naturally occurring substance produced by the body, made up of the amino acids lysine and methionine and requires iron, vitamin B6, vitamin B12 and C for production. Acetyl L-Carnitine is this substance bound to acetic acid, an important co-factor in the production of acetyl CoA, a precursor to the neurotransmitter acetylcholine. In the brain, acetylcholine is involved in learning and memory and stimulates muscle tissue.

    • What is the source of amino acids used in your products?

      - Amino Acid Complex - from whey protein (milk/ dairy)
      - L-Arginine 500 mg - Poultry
      - L-Tyrosine 500 mg - Poultry
      - N-Acetyl Cysteine 600 mg - Poultry
      - L-Glutamine 500 mg - Fermentation from yeast (Tapioca)
      - L-Carnitine 500 mg – Synthesized, nature identical
      - Acetyl L-Carnitine 500 mg – Synthesized, nature identical
      - L-Theanine 200 mg - Green tea leaves
      - 5-HTP 100 mg - from seeds of Griffonia simplicifolia (shrub)
      - L-Lysine 500 mg – Synthesized, nature identical

    • What are the most popular forms of branched chain amino acids (BCAAs)?

      The most popular form of branched chain amino acids or BCAAs are valine, leucine, and isoleucine. These three essential amino acids make up one third of muscle protein, and are responsible for: rebuilding stressed muscles, promoting quick recovery, and preventing muscles from breaking down.

    • How do regular amino acids and branched chain amino acids differ?

      Branched chain amino acids, also called BCAAs, are the combination of three essential amino acids—valine, leucine, and isoleucine. Because they make up one third of muscle protein, branched chain amino acids are particularly important for anyone who lifts weights. Branched chain amino acids differ from amino acids because they are metabolized in the muscle, rather than in the liver. This means that after digestion occurs, BCAAs can be burned as energy-producing fuel, or they can be used to build new proteins. BCAAs rebuild are ideal for athletes who participate in endurance activities as well as bodybuilders dieting for a show, as they rebuild stressed muscles, promote quick recovery, give you extra energy, and prevent muscles from breaking down.

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