It is said that Yang Guifei, [Seo Tae-hu], queens of the Royal Court in China, was glad to eat swallow nest soups.

A part of chickens-skins like swallow, wingtip or Peking duck, include much of collagens. Collagens are scleroproteins.

Especially, a part of wing tip includes much of linoleic acid, linolenic acid and cholesterols, so Yang Guifei liked it and was having this kind of fat content a lot.

Of course, Yang Guifei knew what would make her fat, but why she still had to have this kind of food is that her point was to excrete more of sebum.

Collagen will make your skin elastic, and what makes the excretion better is linoleic acid, linolenic acid and cholesterols what really are fat contents.

Excretion of sebum will be less to your ages. When the mount of sebum is 100% in the age of 20’s, it will be less than half in the age of 40’s.

Yang Guifei was eating wing tips, and she must had been preventing from getting lines on her.