Vitamins and minerals mnemonic

Features of pellagra

The mnemonic

The three Ds

What each word stands for

  • DermatitisPhotosensitive rash, Casal necklace
  • DiarrhoeaGastrointestinal mucosal involvement
  • DementiaNeuropsychiatric features

Why it matters clinically

Untreated niacin deficiency adds a fourth D, death. Suspect it in maize-based diets and Hartnup disease.

Where it stops being reliable

It does not capture the cause (niacin or tryptophan deficiency), only the presentation.

Teaching aid, still awaiting independent review. Confirm facts in a standard source.

More mnemonics

Common questions

What is the Vitamins and minerals mnemonic?

The three Ds. It helps you recall: Features of pellagra.

What does "Dermatitis" stand for?

Photosensitive rash, Casal necklace

What does "Diarrhoea" stand for?

Gastrointestinal mucosal involvement

What does "Dementia" stand for?

Neuropsychiatric features

What are all the parts of the The three Ds mnemonic?

Dermatitis: Photosensitive rash, Casal necklace; Diarrhoea: Gastrointestinal mucosal involvement; Dementia: Neuropsychiatric features.

Which topic does this mnemonic belong to?

It belongs to Vitamins and minerals in Biochemistry.

Where does this mnemonic stop being reliable?

It does not capture the cause (niacin or tryptophan deficiency), only the presentation.

How is this useful clinically?

Untreated niacin deficiency adds a fourth D, death. Suspect it in maize-based diets and Hartnup disease.

How do I make this mnemonic stick?

Say it aloud, write it from memory tomorrow, then again in a week. Then test yourself on a Biochemistry question about Vitamins and minerals.

Is this a standard mnemonic?

It is a teaching aid written or adapted by our team. Some resemble ones students share informally. Check any fact that matters in a standard source.