7 comments on âOcean Sunfish are the most useless animal (an epic rant)â. 1  Man alive, when are humans going to realize the world wasnât made for them? 2  So what if this animal grows as nothing more than a source of food for others.
The most important hormones affecting the health of skin, hair and nails are estrogen (especially in proportion to testosterone), thyroid hormones and cortisol. Estrogen: Not surprisingly, estrogen levels affect every part of the body, including hair, skin and nails.
1 Hair and nails are composed of keratinised cells. 2  Phases of the hair cycle are anagen, catagen and telogen. 3  Skin pH 5.5 is protective against microbial attack.  Skin colour depends on melanin and other pigments.