L-Tyrosine 90 Caps — Thyroid, Adrenal & Cognitive Support Amino Acid
L-Tyrosine 90 caps provides pharmaceutical-grade free-form L-tyrosine — the versatile amino acid precursor to both thyroid hormones and the brain's key catecholamine neurotransmitters: dopamine, norepinephrine, and epinephrine (adrenaline).* Tyrosine bridges thyroid health, adrenal function, mood, and cognitive performance — making it one of the most functionally important amino acid supplements for individuals under chronic stress or with thyroid and adrenal concerns.*
Key Benefits
Precursor to dopamine and norepinephrine — supports focus, drive, and mood*
Supports thyroid hormone (T3, T4) synthesis — essential for metabolic rate*
Replenishes catecholamines depleted by chronic stress and adrenal fatigue*
Improves cognitive performance under acute stress in clinical studies*
Supports healthy adrenal function and cortisol response regulation*
Who Is This For?
L-Tyrosine is especially valuable for those with adrenal fatigue, hypothyroidism, chronic stress, low motivation or dopamine-related mood issues, and professionals or students who need peak cognitive performance under pressure. Recommended by Michelle Tonkin ND as part of thyroid and adrenal support protocols.
Frequently Asked Questions
Q: How does L-tyrosine support the thyroid?
A: Thyroid hormones T3 and T4 are synthesized from tyrosine and iodine. Adequate tyrosine is essential for normal thyroid hormone production — especially important in those with iodine adequacy but suboptimal tyrosine status.*
Q: When should I take L-tyrosine?
A: Best taken in the morning or early afternoon on an empty stomach for optimal absorption and cognitive benefits. Avoid taking close to bedtime as its stimulating effects may affect sleep.
Q: Is this the same formula as the 100-cap version?
A: Similar formula, slightly smaller bottle size. Both provide free-form pharmaceutical-grade L-tyrosine.
Best For
L is best for everyday wellness, nutritional gaps, and whole-body health support. It is especially well-suited for individuals seeking a professional, practitioner-vetted supplement as part of a holistic wellness routine.
How to Use
Take as directed on the label or by your healthcare practitioner. Always follow the label directions or guidance from your healthcare provider. Do not exceed the recommended dose.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.