Homocysteine alone could not reliably identify burning mouth syndrome in this small study of 38 people. Researchers compared 21 people with burning mouth syndrome with 17 people without it. This condition causes lasting burning pain in the mouth without a clear cause. They measured Homocysteine, vitamin B6, and ACTH, a hormone involved in the body's stress response. Questionnaires measured Anxiety and Depression / Low Mood. There were no clear differences between groups for any of the three blood tests. The estimated middle difference for Homocysteine was just −0.13 µmol/L. Most people in both groups had levels within the usual range. Most also had enough vitamin B6 and usual resting ACTH levels. The more notable finding was how the blood results related to each other. Among people with burning mouth syndrome, higher Homocysteine strongly lined up with higher ACTH. The link scored 0.806, where 1 means a perfect match in ranking. In people without the condition, the score was only 0.204. Within the burning mouth group, higher levels of both also matched worse mood questionnaire scores. Vitamin B6 showed no clear link with those scores or the other blood tests. These findings show a pattern, not cause and effect. They do not show that lowering Homocysteine would ease mouth pain or mood symptoms. Larger studies need to check whether the pattern holds. For BioSocial members, this adds context to a single blood result. Tracking test dates alongside mood and mouth symptoms could help members compare notes. It would not turn one number into a test for this condition. What have you noticed when comparing your Homocysteine results with mood or mouth symptoms?