Final answer:
Consistently consuming raw egg whites can lead to a deficiency of biotin, a vitamin in the B-complex group. This can cause hair loss, greying of hair, and nervous system problems.
Step-by-step explanation:
Consistently consuming raw egg whites, as in a daily high-protein drink, can lead to a deficiency of biotin, also known as vitamin B-7. Raw egg whites contain a protein called avidin that binds to biotin and prevents its absorption, resulting in a deficiency. Symptoms of biotin deficiency can include hair loss (alopecia), greying of hair, and nervous system problems.