l carnitine causes anxiety Revisiting the Role of in Heart Disease Through the Lens of the Gut Microbiota Best Time to Take L-Carnitine:
Description
Reproduction 141 , 139150 (2011)

In a retrospective, observational, database-based study, acetyl-l-carnitine acted synergistically with pregabalin in patients with nerve compression neuropathies [49]

High plasma TMAO concentrations were associated with increased incidence of all-cause mortality (14 studies for 16 cohorts enrolling 15,662 subjects, hazard ratio: 1.91
Taking creatine may slightly improve muscle strength in people with fibromyalgia, but it doesn't appear to improve other symptoms such as pain or sleep quality
