• Pure L-Tyrosine
  • Precursor of bioactive bodily substances
  • Essential amino acid
  • Brain, nerves & energy
  • 500 mg per capsule
  • 120 vegetable capsules
Out of stock
EUR 18.35
  • Shipping within 3 days
  • Questions about this product? Call +3124 - 663 53 66 or chat with us

L-Tyrosine by Doctor's Best

L-Tyrosine is a semi-essential amino acid with several important functions throughout the body. It is a building block for the formation of signaling substances in the brain and nervous system, such as the neurotransmitters adrenaline, norepinephrine and dopamine, and for the formation of Coenzyme Q10.

Essential in some situations

L-tyrosine is synthesized in the body from the amino acid phenylalanine, but supplementation with L-tyrosine may be helpful in some cases. The non-essential amino acid L-tyrosine under certain conditions becomes semi-, or conditionally, essential.


  • Semi-essential organic amino acid
  • Precursor of bioactive substances in the body
  • Gets you moving
  • Does not contain gluten and GMO-free

High bioavailability

Tyrosine comes in an L shape and a D shape. Our body only recognizes the natural L, or left-turning, shape. The mirrored D-shape is the synthetic shape that is not found in living material. Doctor's Best L-Tyrosine contains only the natural L-form and therefore has a very high bioavailability.

Amino Acids Competition

The larger amino acids such as L-tyrosine, L-tryptophan, phenylalanine, methionine and the BCAA's leucine, isoleucine and valine all use the same so-called enzyme transport system for efficient absorption. In order to obtain maximum benefit from L-tyrosine, always separate Doctor's Best L-tyrosine from other amino acids or proteins. Carbohydrates can be taken together with L-tyrosine.

About Doctor's Best

Doctor's Best was founded in 1990 by a physician interested in wholesome nutrition answering to scientific perspectives. The company has produced already over 200 state-of-the-art nutritional supplements. All products contain branded raw materials and are thoroughly tested at every step of the production process, from raw material to finished product. during the manufacture of products the company comprehensively applies Guidelines for Current Good Manufacturing Practice (cGMP). Doctor's Best collaborates with nutrition scientists around the world to find superior ingredients that have been well researched. This leads to high-quality end products reflecting the latest scientific insights.

Standardized brand products

In its products Doctor's Best almost exclusively uses proprietary and standardized brand materials of official trademarks that have been extensively researched. The authenticity of these ingredients is guaranteed in all products. Doctor's Best never uses alternatives. This results in a qualitatively superior line of supplements with exceptionally high bioavailability.

More Information
Product Name
Doctors Best
120 capsules
User Instructions

Take 1 capsule daily between meals, or more as recommended by a healthcare practitioner.

Ingredients per Serving

500 mg tyrosine (L-tyrosine).

EU Norm
*RDA = Recommended Daily Allowance
Other Ingredients

Modified cellulose (vegetable capsule).

Storage: see label. Keep out of the reach of children. Consult an expert before use in case of pregnancy, breastfeeding, illness or medication.
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