melanotic tongue A) Hairy black tongue. (B) Linea alba. (C) Oral macule. (D) tobacco-induced melanosis on dorsal surface

The lesion was not tender, did not blanch under pressure and was not fixed to the underlying mucosa

Whilst we found that ex vivo vehicle treated cells produced high levels of cytokines, including IL-5, IL-13, IL-9 ( Supplementary Figures 4BD ), and modest amounts of IL-10 and IL-6 ( Supplementary Figures 4E, F ), melatonin treatment greatly reduced the concentration of all cytokines analyzed ( Supplementary Figures 4B F )

An inadequate selenium supply impairs the synthesis of the mitochondrial envelope of sperm, which affects sperm motility and may lead to infertility (Wang et al., 2021)

But half-life and duration of effect are different things