Buy L-Tyrosine: an amino acid for mental performance
L-Tyrosine 500 mg by Doctor’s Best provides a pure, free form of this key amino acid, a direct precursor to the neurotransmitters behind motivation and focus. Available at our Paris shop, with Click & Collect and delivery across France and Europe.
What is L-Tyrosine?
L-Tyrosine is a non-essential amino acid the body can make from phenylalanine. Under conditions of stress, intense fatigue or sleep deprivation, tyrosine needs can outpace the body’s own production. Supplementation provides the raw material the body uses to produce neurotransmitters such as dopamine and noradrenaline.
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Tyrosine and neurotransmitter synthesis
L-Tyrosine is the direct precursor of the catecholamine family — dopamine, noradrenaline and adrenaline. Tyrosine is first converted to L-DOPA, then to dopamine, which can go on to become noradrenaline and then adrenaline. Dopamine is linked to motivation, pleasure and learning; noradrenaline to attention, alertness and the stress response; adrenaline to the emergency response and energy mobilisation.
An alternative in the same family: L-Tyrosine 500mg by Dynveo.
Tyrosine and thyroid function
Beyond neurotransmitter synthesis, tyrosine is also a building block of thyroid hormones: the thyroid uses tyrosine and iodine to produce T4 and T3, which regulate basal metabolism, body heat, heart rate and many other functions. Adequate tyrosine intake, alongside sufficient iodine, selenium and zinc, supports normal thyroid metabolism. Supplementation does not replace medical follow-up for a diagnosed thyroid condition.
How to use & precautions
Take 1 to 2 capsules per day, ideally on an empty stomach or between meals for optimal absorption — this avoids competition with dietary amino acids sharing the same intestinal transporters. The bottle of 120 capsules provides 2 to 4 months of use depending on dosage.
Food supplement. Not a substitute for a varied, balanced diet and a healthy lifestyle. Do not exceed the recommended daily dose. We recommend seeking advice from a healthcare professional before starting supplementation.
Frequently asked questions
What are the benefits of L-Tyrosine?
L-Tyrosine is an amino-acid precursor to dopamine, noradrenaline and thyroid hormones. It supports concentration, motivation, stress resilience and alertness, and is particularly useful during periods of intense stress, fatigue or sleep deprivation to help maintain cognitive performance.
How do I take L-Tyrosine 500mg Doctor’s Best?
Take 1 to 2 capsules per day, ideally on an empty stomach or between meals to optimise absorption. The bottle contains 120 capsules, 2 to 4 months’ worth.
Where can I buy L-Tyrosine in Paris?
L-Tyrosine 500mg by Doctor’s Best is available at Herba Barona, 10 rue Théophile Roussel, Paris 12. You can also order online with delivery across France and Europe.
Why buy from Herba Barona?
Herba Barona is an independent specialist supplement shop in the heart of Paris — established in 2006. What you order is genuinely on our shelves: we ship from our own stock, with no dropshipping and no long waits.
Visit us at 10 rue Théophile Roussel, Paris 12 — or use Click & Collect and pick up your order in-store. We also deliver across France and Europe. Friendly, expert advice in English from our team.
Delivery & collection
Where is the shop?
Herba Barona is at 10 rue Théophile Roussel, 75012 Paris — a two-minute walk from Ledru-Rollin (line 8), close to Bastille. Open Tuesday to Saturday, 9:30 am–6:30 pm.
Can I order online or collect in store?
Yes. We ship across France and Europe under the same conditions as our French store, or choose Click & Collect to pick up your order for free at our Paris shop.
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Food supplement. Does not replace a varied, balanced diet or a healthy lifestyle. Do not exceed the recommended daily dose. Keep out of reach of children.
