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

Table 1

Components of each tablet.

	Cystine/Theanine	Placebo
L-Cystine	175	—
L-Theanine	70	—
Glycine	—	245
Microcrystalline cellulose	100	100
Dextrin	114	115
Micronized silicon dioxide	2.5	10
Glycerine fatty acid ester	32.5	25
Aspartame	1	—
Vanilla flavor	5	5
Total	500	500