Palmitoylethanolamide: A Natural Body-Own Anti-Inflammatory Agent, Effective and Safe against Influenza and Common Cold

Table 1

Incidence of endpoints between both the PEA and the placebo groups.

Study (year)	PEA (𝑛)	Placebo (𝑛)	% Protection	Significance (𝑃)
Masek (1972a) [14]	223	221	45%	<0.05
Masek (1972b) [14]	436	463	32%	<0.0005
Kahlich (1973) [14]	436	465	34%	<0.0002
Kahlich (1974) [14]	411	199	52%	<0.002
Kahlich (1975) [14]	235	118	59%	<0.004
Plesnik (1977) [15]	196	224	16%	NS