L-Tyrosine is a non-essential amino acid the body synthesises from phenylalanine. However, this internal synthesis can fall short under intense stress, sleep deprivation, high mental workload or sustained athletic training — which is where extra L-Tyrosine helps maintain optimal levels of catecholamine neurotransmitters. Tyrosine is the precursor of three major neurotransmitters: dopamine (motivation, pleasure, reward — optimal levels support good focus and emotional wellbeing), noradrenaline (attention, alertness and the stress response, key to staying focused under pressure), and adrenaline (reactivity and physical performance, synthesised from noradrenaline). It also feeds into thyroid hormone synthesis (T3 and T4) and melanin production, and is one of the most studied amino acids in nutritional neuroscience.

Dynveo’s L-Tyrosine is produced by microbial fermentation on a plant substrate, with no chemical extraction or solvents — a process that guarantees the L- (levorotatory) form, the only biologically active one. Purity exceeds 98.5%, with every batch tested to confirm the absence of contaminants and the exact active-ingredient concentration. There are zero excipients — just pure L-Tyrosine and a pullulan (plant-based) capsule shell, with no magnesium stearate, silicon dioxide or maltodextrin — and the product is made in France under GMP quality control.

L-Tyrosine is especially sought after by students, professionals under high cognitive load, and athletes. As a dopamine precursor, it helps maintain motivation and mental clarity, especially when catecholamine reserves are heavily drawn on. Research conducted by the US military has shown that L-Tyrosine supplementation can help maintain cognitive performance under environmental stress (sleep deprivation, cold exposure, altitude) — findings that have made L-Tyrosine one of the most studied natural nootropics in the world. It’s also one of the two building blocks (with iodine) needed for thyroid hormone synthesis, contributing to normal thyroid function alongside adequate iodine and selenium intake.

Dose: 1 to 2 capsules a day (500–1,000 mg). Best taken in the morning on an empty stomach or 30 minutes before mental or physical exertion, with a glass of water. Suggested course: 1 to 3 months, renewable after a break. Pairs well with magnesium and vitamin B6 (P5P), which are cofactors in neurotransmitter synthesis, and with Rhodiola Rosea or Ashwagandha for a broader stress-resilience protocol.

Do not exceed the recommended daily dose. This food supplement is not a substitute for a varied, balanced diet and a healthy lifestyle. Keep out of reach of children.

What’s the difference between L-Tyrosine and N-Acetyl-L-Tyrosine (NALT)?

Free L-Tyrosine is the natural form directly usable by the body. NALT is more water-soluble but must be reconverted to L-Tyrosine by the body, with limited conversion efficiency. Most clinical studies use free L-Tyrosine — the reference form, and what Dynveo’s product provides.

Can L-Tyrosine be taken every day?

Yes, in courses of 1 to 3 months, with a 1–2 week break between courses.

Does L-Tyrosine help with exam focus?

Yes — as a precursor of dopamine and noradrenaline, it supports concentration, working memory and resistance to mental fatigue. A common combination is L-Tyrosine + magnesium bisglycinate + phosphatidylserine.

Is L-Tyrosine suitable for vegans?

Yes, 100% plant-based — an amino acid from bio-fermentation on a plant substrate, in a naturally derived pullulan capsule, with no animal-derived ingredients.

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.

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.