Meet Lizzie Velasquez, a 27 year old from Texas who was born with a super rare condition. It is called neonatal progeroid syndrom and among other things it causes her body to age faster and it makes her unable to gain any weight. As far as she knows, she said, there are only two other people in the world suffering from the exact same thing. So she is truly alone in this.
What this means is that Lizzie is really really thin. She could eat absolutely what she wants and she never gains any weight. In fact, in the last 27 years of her life, she never weighed more than 64 pounds.
Remarkably, Lizzie is an optimistic person that despite a horrible past finds many advantages in her disease.