Flutterby™! : Milk & Mucus

Relationship between milk intake and mucus production in adult volunteers challenged with rhinovirus-2. Pinnock, Graham, Mylvaganam, and Douglas (1990(!)):

... Those who believe "milk makes mucus" or reduce milk intake with colds reported significantly more cough and congestion symptoms, but they did not produce higher levels of nasal secretions. We conclude that no statistically significant overall association can be detected between milk and dairy product intake and symptoms of mucus production in healthy adults, either asymptomatic or symptomatic, with rhinovirus infection.