Nutrition and malnutrition: raw egg white and biotin: practice question

The best answer is A, Biotin. Avidin in raw egg white binds biotin tightly and prevents its absorption, so heavy raw-egg intake causes biotin deficiency.

Pyridoxine deficiency presents mainly with seizures and irritability.

Zinc deficiency gives a similar rash but not a link to egg white.

Niacin deficiency gives photosensitive dermatitis with diarrhoea and dementia.

It tests Nutrition and malnutrition: raw egg white and biotin in Pediatrics. Cooking denatures avidin. The picture of dermatitis, hair loss and hypotonia also occurs in biotinidase deficiency.

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

Memorise milestones and the vaccine schedule as tables and revise them often. Then use the flashcards and the other Pediatrics questions on this site to test what stuck.

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.