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Tyrosine side effects

Across 1,662 first-hand reports, people mentioned a side effect 76 times (about 5 per 100 reports). The most common: anxiety, headache, irritability. User reports show what people notice — they can't tell you whether Tyrosine is safe for you.

Reported side effects

anxiety19
headache15
irritability15
jitteriness12
insomnia12
joint pain1
inflammation1
anhedonia1

What got worse for some people

In their own words

“L-Tyrosine gives me nothing but the shakes that feel similar to a blood glucose crash.”
MixedRead the discussion ↗
“I tried so many things for depression like saffron rhodiola tyrosine omega 3 methylfolate B12 taurine theanine NAC inositol b complex magnesium nothing helps it.”
Didn't helpRead the discussion ↗
“despite taking it multiple times daily for about 4 years, I still seem to very consistently get strong positive effects from L-tyrosine...Light euphoria, motivation, energy, etc.”
HelpedRead the discussion ↗
“At first I thought L-Tyrosine was amazing. It seemed to keep my anxiety down and I was able to handle stress better.”
MixedRead the discussion ↗
“I eventually increased the Noopept NALT ALCAR dose to 2 capsules 3x daily for a week before running out and nothing.”
Didn't helpRead the discussion ↗
“L-Tyrosine | Gamechanger for me. Able to focus on only ONE thing at a time.”
MixedRead the discussion ↗

Is Tyrosine safe? What the research covers

AResearch: Strong2,190 meta-analyses · 1,766 randomized trials on PubMed
BMJ · 2025
Cardiovascular adverse events associated with epidermal growth factor receptor tyrosine kinase inhibitors in EGFR-mutated non-small cell lung cancer: systematic review and network meta-analysis

Conclusion: In patients with EGFR-mutated NSCLC, first and third generation EGFR tyrosine kinase inhibitors, as well as combination therapies with antiangiogenesis, were associated with increased risks of cardiovascular adverse events. Risks were significantly higher with third generation compared with first generation inhibitors.

Lancet Oncol · 2024
Efficacy and safety of immune checkpoint inhibitors for individuals with advanced EGFR-mutated non-small-cell lung cancer who progressed on EGFR tyrosine-kinase inhibitors: a systematic review, meta-analysis, and network meta-analysis

Conclusion: For individuals with advanced EGFR-mutated NSCLC who progressed on EGFR-TKIs, ICI-antiangio-chemo was identified as the optimal treatment option. The toxicity of this treatment was acceptable but needs careful attention. ICI-chemo showed appreciably greater efficacy than the standard-of-care chemotherapy. These findings clarified the roles of ICI-based treatment strategies in this difficult-to-treat refractory population, potentially complementing recent guidelines.

Cancer Immunol Immunother · 2024
Updated systematic review and network meta-analysis of first-line treatments for metastatic renal cell carcinoma with extended follow-up data

Conclusion: Further, OS benefits of ICI doublets were not inferior to those of ICI + tyrosine kinase inhibitor combinations. Recommendation of combination therapies with ICIs and/or tyrosine kinase inhibitors based on survival benefits and patient pretreatment risk classification will help advance personalized medicine for mRCC.

Tyrosine side effects: what 1,662 users report — PlainPill