Rare diseases · Sign or symptom
Decreased circulating vitamin B1 concentration
Vitamin B1 deficiency
HP:0100503
What it means
The concentration of vitamin B1 in the blood circulation is below the lower limit of normal.
Rare diseases that can present with this4
Very common80–99%
3The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Low levels of vitamin B1 · Reduced blood thiamine level
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.