Effects of L-Cystine and L-Theanine Supplementation on the Common Cold: A Randomized, Double-Blind, and Placebo-Controlled Trial

Table 2

Criteria of laboratory-defined colds.

Incidence of each main symptom
Nasal	Total score/day ≧ 3/6
Throat
Pain
Febrile	Total score/day ≧ 2/4
Incidence of colds
Number of the positive main symptom ≧ 3/day
or
Body temperature ≧ 37^∘C and number of the cold symptom score
of 2 ≧ 2/day