87
/ 100
True
L-Tyrosine is constrained by feedback inhibition, and supplemental intake does not increase catecholamines unless neurons are stressed and firing rapidly.
Infact verdict: True (87/100).
The claims regarding L-Tyrosine are supported by scientific evidence. The first claim about L-Tyrosine being constrained by end-product feedback inhibition is corroborated by multiple sources, indicating that the biosynthesis of L-Tyrosine is indeed subject to strict feedback inhibition. The second claim, that supplemental intake of L-Tyrosine does not raise baseline catecholamines unless neurons are stressed, is also supported by several studies. These studies confirm that L-Tyrosine only boosts catecholamine output when neurons are firing rapidly due to stress. Overall, the evidence supports the factual accuracy of both claims.
How is this score determined? →Individual claims
88
True
Science
L-Tyrosine is tightly constrained by end-product feedback inhibition.
The claim is supported by evidence indicating that L-Tyrosine biosynthesis is subject to strict feedback inhibition by the pathway end-product, L-Tyrosine. This is corroborated by sources such as the study on Bacillus amyloliquefaciens and general biochemical principles of feedback inhibition.
Fact Check Score
None
Fact Check Weight
0
Web Consensus Score
85
Web Consensus Weight
40
Source Quality Score
80
Source Quality Weight
20
Llm Reasoning Score
75
Llm Reasoning Weight
40
Llm Reasoning Score Raw
75
Weighted Total
88
Evidence Summary
2 web sources corroborate feedback inhibition of L-Tyrosine.
86
True
Science
Supplemental intake of L-Tyrosine does not raise baseline catecholamines unless neurons are actively stressed and firing rapidly.
The claim is supported by multiple sources indicating that L-Tyrosine only boosts catecholamine output when neurons are firing rapidly due to stress, not at baseline. This is confirmed by studies and articles discussing the effects of L-Tyrosine under stress conditions.
Fact Check Score
None
Fact Check Weight
0
Web Consensus Score
80
Web Consensus Weight
40
Source Quality Score
75
Source Quality Weight
20
Llm Reasoning Score
70
Llm Reasoning Weight
40
Llm Reasoning Score Raw
70
Weighted Total
86
Evidence Summary
3 web sources confirm L-Tyrosine's effect under stress.
