Niacin (vitamin B3) deficiency causing dermatitis, diarrhea, and dementia
To support a rating at any level, medical records documenting a confirmed diagnosis of pellagra are the starting point. For the 10% level, records showing nonspecific symptoms — such as weight loss, poor appetite, abdominal discomfort, weakness, or difficulty concentrating — help establish the baseline picture.
For the 20% level, exam findings or clinical notes confirming stomatitis, achlorhydria, or diarrhea are relevant. Moving to 40% requires documentation of all three of those conditions together, along with evidence of symmetrical dermatitis, which a dermatology or primary care exam could capture. Photographs of skin findings can also be useful.
At 60%, mental health records or neuropsychiatric evaluations showing mental symptoms, combined with clinical findings of reduced physical strength or stamina, help show that level. For the 100% level, records reflecting marked mental deterioration, moist or weeping skin lesions, documented inability to retain food or nutrition, profound exhaustion, and cachexia — including weight measurements and nutritional assessments — speak directly to those criteria. Statements from you or people who observe you daily can also show how symptoms affect your ability to work and carry out normal activities.
Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.