Can eating donkey-hide gelatin improve yellow complexion?

I'm about your age, with a yellow complexion and poor constitution, but I feel much better after eating Ejiao, and I get angry more easily. But I don't eat much donkey-hide gelatin every time. I eat a little every morning (grinding it into powder and eating it with boiling water), so I won't get angry. I think this method is good, and it is not smelly and delicious with water and sugar. So are you.