She recently lashed out at body shamers who accused her of taking drugs to stay thin, revealing her slim frame was due to a thyroid disease.
Gigi went on to explain what Hashimoto's disease is and how it affects a person's size.
At DVF, the label's creator, Diane von Furstenberg, introduced a new (and returning) designer - Nathan Jenden - and a new muse for the brand: her 18-year-old granddaughter, Talita von Furstenberg, who modeled an outfit from the new collection and pronounced it "really cool" to embark on her new role. According to a report from the Mayo Clinic, "the virus attacks the immune system as well as the thyroid gland".
The disease can result in multiple symptoms, including sluggishness, pale skin, brittle nails, hair loss and joint pain.
She explained that she has been "properly medicated" the past several years and also took part in a "holistic medical trial" that helped balance her thyroid. Now, her body only handles things differently.
She added: "I may be "too skinny" for u, honestly this skinny isn't what I want to be, but I feel healthier internally". "Use your energy to lift those that you admire rather than be cruel to those u don't", she finished.
"I will not further explain the way my body looks, just as anyone, with a body type that doesn't suit ur "beauty" expectation, shouldn't have to".
Pence raises prospect of US-NKorea talks, Seoul seeks to lower tensions
Moon met Kim Yo Jong and the North's ceremonial head of state Kim Yong Nam for talks and lunch at the Blue House today. North Korea has spent years developing its military, saying it needs to protect itself from USA aggression.
Gigi's post ended with a plea for social media users and fans to have more empathy with others rather than judging those they don't know.
We couldn't agree with that more.
Last month, Gigi posed naked on the cover of Vogue magazine with her sister Bella.
She complemented the look with the gown's pinstripe ruffle top and toughened up the all-black ensemble with a pair of light grey military-style boots.
Hadid first opened up about her health battles in 2016, telling ELLE magazine "my metabolism actually changed like insane this year".
It was back in late 2016 that Hadid first divulged her struggles with the Hashimoto's disease.
Earlier in the day she took to Twitter to address her health, calling out those who were 'so determined to come up with why my body has changed over the years'.