TNF and metabolic syndrome: In the same line, Jensen et al. [37] showed that, in a randomized, double-blind study with adults suffering from metabolic syndrome (n = 15, mean age of 53 years old), the supplementation with 4 g of cod peptides during eight weeks did not induce any statistically significant differences in the concentration of the inflammatory markers evaluated (i.e., TNF-α and IL 1β, IL 6).