Supplement reference
L-Tyrosine
A source-linked reference on L-Tyrosine, evidence, safety and product identity. Sources checked 6 September 2026.
Source and review status
Published sources checked
Sources checked on: 6 September 2026
Qualified clinical review: Pending. This page has not been clinically reviewed.
About this source check
AI-assisted editorial source checking covers the cited material and its stated limits. It is not a systematic review, verification of a supplied product, or clinical sign-off.
Editorial role: InfoAddict. Last material change: 6 September 2026. Next source review: 6 March 2027.
Ingredient and preparation
L-tyrosine is an amino acid used in protein synthesis and sold in isolated products.
Sources: National Library of Medicine, PubMed
Evidence and limits
A rapid evidence review of 10 randomised and 4 controlled trials found insufficient evidence for confident recommendations about tyrosine under physical or cognitive stress. Its mostly short, stress-condition studies do not establish a treatment for fatigue, thyroid disease or a general cognitive benefit.
Sources: National Library of Medicine, PubMed
Safety and a useful record
Tyrosine can be relevant to medicine and endocrine context. Do not add it to a routine to self-manage a persistent symptom without appropriate advice.
Sources: National Library of Medicine, PubMed, National Center for Complementary and Integrative Health
Record the reason for considering it, concurrent medicines and a clearly defined observation.
Sources: National Center for Complementary and Integrative Health
Published sources
- Tyrosine for Mitigating Stress and Enhancing Performance in Healthy Adult Humans, a Rapid Evidence Assessment of the Literature
National Library of Medicine, PubMed. Published 2015; accessed 6 September 2026.
Supports: Review of 10 randomised and 4 controlled trials found insufficient evidence for confident effectiveness recommendations under physical or cognitive stress.
- Safe Use of Complementary Health Products and Practices
National Center for Complementary and Integrative Health. Current NCCIH reference; accessed 6 September 2026.
Supports: General safety, interaction and contamination context. It does not establish ingredient-specific benefit.
Change history
| Date | Change | Clinical-review status |
|---|---|---|
| 6 September 2026 | Source-linked reference published | Pending |
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